About
Dr Ardalan Armin is a member of the Physics Department at Swansea University.
Professor Ardalan Armin
Associate Professor,
Physics
Telephone number
+44 (0) 1792
Research Links
Areas Of Expertise
- Physics
- Optoelectronics
- Physical chemistry
Publications
Research Highlights
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Zeiske, S., Sandberg, O., Kurpiers, J., Shoaee, S., Meredith, P., & Armin, A. (2022). Probing Charge Generation Efficiency in Thin-Film Solar Cells by Integral-Mode Transient Charge Extraction. ACS Photonics, 9(4), 1188-1195.
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Riley, D., Sandberg, O., Li, W., Meredith, P., & Armin, A. (2022). Quasi-Steady-State Measurement of Exciton Diffusion Lengths in Organic Semiconductors. Physical Review Applied, 17(2)
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Perdigón‐Toro, L., Phuong, L., Eller, F., Freychet, G., Saglamkaya, E., Khan, J., Wei, Q., Zeiske, S., Kroh, D., Wedler, S., Köhler, A., Armin, A., Laquai, F., Herzig, E., Zou, Y., Shoaee, S., & Neher, D. (2022). Understanding the Role of Order in Y‐Series Non‐Fullerene Solar Cells to Realize High Open‐Circuit Voltages. Advanced Energy Materials, 12(12), 2103422
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Warby, J., Zu, F., Zeiske, S., Gutierrez‐Partida, E., Frohloff, L., Kahmann, S., Frohna, K., Mosconi, E., Radicchi, E., Lang, F., Shah, S., Peña‐Camargo, F., Hempel, H., Unold, T., Koch, N., Armin, A., Angelis, F., Stranks, S., Neher, D., & Stolterfoht, M. (2022). Understanding Performance Limiting Interfacial Recombination in pin Perovskite Solar Cells. Advanced Energy Materials, 12(12), 2103567
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Li, W., Zeiske, S., Sandberg, O., Riley, D., Meredith, P., & Armin, A. (2021). Organic solar cells with near-unity charge generation yield. Energy & Environmental Science, 14(12), 6484-6493.
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Alqahtani, O., Hosseini, S., Ferron, T., Murcia, V., McAfee, T., Vixie, K., Huang, F., Armin, A., Shoaee, S., & Collins, B. (2021). Evidence That Sharp Interfaces Suppress Recombination in Thick Organic Solar Cells. ACS Applied Materials & Interfaces, 13(47), 56394-56403.
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Wang, P., Li, W., Sandberg, O., Guo, C., Sun, R., Wang, H., Li, D., Zhang, H., Cheng, S., Liu, D., Min, J., Armin, A., & Wang, T. (2021). Tuning of the Interconnecting Layer for Monolithic Perovskite/Organic Tandem Solar Cells with Record Efficiency Exceeding 21%. Nano Letters, 21(18), 7845-7854.
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Zeiske, S., Sandberg, O., Zarrabi, N., Li, W., Meredith, P., & Armin, A. (2021). Direct observation of trap-assisted recombination in organic photovoltaic devices. Nature Communications, 12(1)
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Kaiser, C., Sandberg, O., Zarrabi, N., Li, W., Meredith, P., & Armin, A. (2021). A universal Urbach rule for disordered organic semiconductors. Nature Communications, 12(1)
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Riley, D., Sandberg, O., Wilson, N., Li, W., Zeiske, S., Zarrabi, N., Meredith, P., Österbacka, R., & Armin, A. (2021). Direct Quantification of Quasi-Fermi-Level Splitting in Organic Semiconductor Devices. Physical Review Applied, 15(6)
All Research
Journal Articles
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Zeiske, S., Sandberg, O., Kurpiers, J., Shoaee, S., Meredith, P., & Armin, A. (2022). Probing Charge Generation Efficiency in Thin-Film Solar Cells by Integral-Mode Transient Charge Extraction. ACS Photonics, 9(4), 1188-1195.
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Perdigón‐Toro, L., Phuong, L., Eller, F., Freychet, G., Saglamkaya, E., Khan, J., Wei, Q., Zeiske, S., Kroh, D., Wedler, S., Köhler, A., Armin, A., Laquai, F., Herzig, E., Zou, Y., Shoaee, S., & Neher, D. (2022). Understanding the Role of Order in Y‐Series Non‐Fullerene Solar Cells to Realize High Open‐Circuit Voltages. Advanced Energy Materials, 12(12), 2103422
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Riley, D., Sandberg, O., Li, W., Meredith, P., & Armin, A. (2022). Quasi-Steady-State Measurement of Exciton Diffusion Lengths in Organic Semiconductors. Physical Review Applied, 17(2)
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Warby, J., Zu, F., Zeiske, S., Gutierrez‐Partida, E., Frohloff, L., Kahmann, S., Frohna, K., Mosconi, E., Radicchi, E., Lang, F., Shah, S., Peña‐Camargo, F., Hempel, H., Unold, T., Koch, N., Armin, A., Angelis, F., Stranks, S., Neher, D., & Stolterfoht, M. (2022). Understanding Performance Limiting Interfacial Recombination in pin Perovskite Solar Cells. Advanced Energy Materials, 12(12), 2103567
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Alqahtani, O., Hosseini, S., Ferron, T., Murcia, V., McAfee, T., Vixie, K., Huang, F., Armin, A., Shoaee, S., & Collins, B. (2021). Evidence That Sharp Interfaces Suppress Recombination in Thick Organic Solar Cells. ACS Applied Materials & Interfaces, 13(47), 56394-56403.
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Li, W., Zeiske, S., Sandberg, O., Riley, D., Meredith, P., & Armin, A. (2021). Organic solar cells with near-unity charge generation yield. Energy & Environmental Science, 14(12), 6484-6493.
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Wang, P., Li, W., Sandberg, O., Guo, C., Sun, R., Wang, H., Li, D., Zhang, H., Cheng, S., Liu, D., Min, J., Armin, A., & Wang, T. (2021). Tuning of the Interconnecting Layer for Monolithic Perovskite/Organic Tandem Solar Cells with Record Efficiency Exceeding 21%. Nano Letters, 21(18), 7845-7854.
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Sandberg, O. & Armin, A. (2021). Energetics and Kinetics Requirements for Organic Solar Cells to Break the 20% Power Conversion Efficiency Barrier. The Journal of Physical Chemistry C, 125(28), 15590-15598.
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Kaiser, C., Sandberg, O., Zarrabi, N., Li, W., Meredith, P., & Armin, A. (2021). A universal Urbach rule for disordered organic semiconductors. Nature Communications, 12(1)
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Riley, D., Sandberg, O., Wilson, N., Li, W., Zeiske, S., Zarrabi, N., Meredith, P., Österbacka, R., & Armin, A. (2021). Direct Quantification of Quasi-Fermi-Level Splitting in Organic Semiconductor Devices. Physical Review Applied, 15(6)
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Zeiske, S., Sandberg, O., Zarrabi, N., Li, W., Meredith, P., & Armin, A. (2021). Direct observation of trap-assisted recombination in organic photovoltaic devices. Nature Communications, 12(1)
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Burwell, G., Burridge, N., Bond, E., Li, W., Meredith, P., & Armin, A. (2021). Parameterization of Metallic Grids on Transparent Conductive Electrodes for the Scaling of Organic Solar Cells. Advanced Electronic Materials, 7(6), 2100192
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Nyman, M., Sandberg, O., Li, W., Zeiske, S., Kerremans, R., Meredith, P., & Armin, A. (2021). Requirements for Making Thick Junctions of Organic Solar Cells based on Nonfullerene Acceptors. Solar RRL, 5(5), 2100018
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Perdigón-Toro, L., Phuong, L., Zeiske, S., Vandewal, K., Armin, A., Shoaee, S., & Neher, D. (2021). Excitons Dominate the Emission from PM6:Y6 Solar Cells, but This Does Not Help the Open-Circuit Voltage of the Device. ACS Energy Letters, 6(2), 557-564.
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Zarrabi, N., Sandberg, O., Kaiser, C., Subbiah, J., Jones, D., Meredith, P., & Armin, A. (2020). Experimental Evidence Relating Charge-Transfer-State Kinetics and Strongly Reduced Bimolecular Recombination in Organic Solar Cells. The Journal of Physical Chemistry Letters, 11(24), 10519-10525.
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Zarrabi, N., Sandberg, O., Zeiske, S., Li, W., Riley, D., Meredith, P., & Armin, A. (2020). Charge-generating mid-gap trap states define the thermodynamic limit of organic photovoltaic devices. Nature Communications, 11(1)
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Burwell, G., Burridge, N., Sandberg, O., Bond, E., Li, W., Meredith, P., & Armin, A. (2020). Metal Grid Structures for Enhancing the Stability and Performance of Solution‐Processed Organic Light‐Emitting Diodes. Advanced Electronic Materials, 6(12), 2000732
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Gielen, S., KAISER, C., Verstraeten, F., Kublitski, J., Benduhn, J., Spoltore, D., Verstappen, P., Maes, W., Meredith, P., Armin, A., & Vandewal, K. (2020). Intrinsic Detectivity Limits of Organic Near‐Infrared Photodetectors. Advanced Materials, 32(47), 2003818
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Armin, A., Zarrabi, N., Sandberg, O., Kaiser, C., Zeiske, S., Li, W., & Meredith, P. (2020). Limitations of Charge Transfer State Parameterization Using Photovoltaic External Quantum Efficiency. Advanced Energy Materials, 10(41), 2001828
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Meredith, P., Li, W., & Armin, A. (2020). Nonfullerene Acceptors: A Renaissance in Organic Photovoltaics?. Advanced Energy Materials, 10(33), 2001788
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Armin, A., Caprioglio, P., Wolff, C., Sandberg, O., Armin, A., Rech, B., Albrecht, S., Neher, D., & Stolterfoht, M. (2020). On the Origin of the Ideality Factor in Perovskite Solar Cells. Advanced Energy Materials, 10(27), 2000502
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Sandberg, O., Zeiske, S., Zarrabi, N., Meredith, P., & Armin, A. (2020). Charge Carrier Transport and Generation via Trap-Mediated Optical Release in Organic Semiconductor Devices. Physical Review Letters, 124(12)
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Schwarz, K., Geraghty, P., Mitchell, V., Khan, S., Sandberg, O., Zarrabi, N., Kudisch, B., Subbiah, J., Smith, T., Rand, B., Armin, A., Scholes, G., Jones, D., & Ghiggino, K. (2020). Reduced Recombination and Capacitor-like Charge Buildup in an Organic Heterojunction. Journal of the American Chemical Society, 142(5), 2562-2571.
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Hao, M., Bai, Y., Zeiske, S., Ren, L., Liu, J., Yuan, Y., Zarrabi, N., Cheng, N., Ghasemi, M., Chen, P., Lyu, M., He, D., Yun, J., Du, Y., Wang, Y., Ding, S., Armin, A., Meredith, P., Liu, G...., & Wang, L. (2020). Ligand-assisted cation-exchange engineering for high-efficiency colloidal Cs1−xFAxPbI3 quantum dot solar cells with reduced phase segregation. Nature Energy, 5(1), 79-88.
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Zeiske, S., Kaiser, C., Meredith, P., & Armin, A. (2020). Sensitivity of Sub-Bandgap External Quantum Efficiency Measurements of Solar Cells under Electrical and Light Bias. ACS Photonics, 7(1), 256-264.
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Kaiser, C., Zeiske, S., Meredith, P., & Armin, A. (2020). Determining Ultralow Absorption Coefficients of Organic Semiconductors from the Sub‐Bandgap Photovoltaic External Quantum Efficiency. Advanced Optical Materials, 8(1), 1901542
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Fang, Y., Armin, A., Meredith, P., & Huang, J. (2019). Accurate characterization of next-generation thin-film photodetectors. Nature Photonics, 13(1), 1-4.
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Shoaee, S., Armin, A., Stolterfoht, M., Hosseini, S., Kurpiers, J., & Neher, D. (2019). Decoding Charge Recombination through Charge Generation in Organic Solar Cells. Solar RRL, 3(11), 1900184
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Sandberg, O. & Armin, A. (2019). On the effect of surface recombination in thin film solar cells, light emitting diodes and photodetectors. Synthetic Metals, 254, 114-121.
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Sandberg, O. & Armin, A. (2019). On the effect of surface recombination in thin film solar cells, light emitting diodes and photodetectors. Synthetic Metals, 254, 114-121.
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Kerremans, R., Sandberg, O., Meroni, S., Watson, T., Armin, A., & Meredith, P. (2019). On the Electro‐Optics of Carbon Stack Perovskite Solar Cells. Solar RRL, 4(2), 1900221
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Hood, S., Zarrabi, N., Meredith, P., Kassal, I., & Armin, A. (2019). Measuring Energetic Disorder in Organic Semiconductors Using the Photogenerated Charge-Separation Efficiency. The Journal of Physical Chemistry Letters, 3863-3870.
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Sandberg, O., Tvingstedt, K., Meredith, P., & Armin, A. (2019). Theoretical Perspective on Transient Photovoltage and Charge Extraction Techniques. The Journal of Physical Chemistry C, 123(23), 14261-14271.
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Hosseini, S., Roland, S., Kurpiers, J., Chen, Z., Zhang, K., Huang, F., Armin, A., Neher, D., & Shoaee, S. (2019). Impact of Bimolecular Recombination on the Fill Factor of Fullerene and Nonfullerene-Based Solar Cells: A Comparative Study of Charge Generation and Extraction. The Journal of Physical Chemistry C, 123(11), 6823-6830.
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Basiri Esfahani, S., Armin, A., Forstner, S., & Bowen, W. (2019). Precision ultrasound sensing on a chip. Nature Communications, 10(1)
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Meredith, P. & Armin, A. (2018). Scaling of next generation solution processed organic and perovskite solar cells. Nature Communications, 9(1)
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Meredith, P., Armin, A., & Meredith, P. (2018). LED technology breaks performance barrier. Nature, 562(7726), 197-198.
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Zarrabi, N., Yazmaciyan, A., Meredith, P., Kassal, I., & Armin, A. (2018). Anomalous Exciton Quenching in Organic Semiconductors in the Low-Yield Limit. The Journal of Physical Chemistry Letters, 9(20), 6144-6148.
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Yazmaciyan, A., Stolterfoht, M., Burn, P., Lin, Q., Meredith, P., & Armin, A. (2018). Recombination Losses Above and Below the Transport Percolation Threshold in Bulk Heterojunction Organic Solar Cells. Advanced Energy Materials, 1703339
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Zhang, S., Stolterfoht, M., Armin, A., Lin, Q., Zu, F., Sobus, J., Jin, H., Koch, N., Meredith, P., Burn, P., & Neher, D. (2018). Interface Engineering of Solution-Processed Hybrid Organohalide Perovskite Solar Cells. ACS Applied Materials & Interfaces, 10(25), 21681-21687.
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Armin, A., Chen, Z., Jin, Y., Zhang, K., Huang, F., & Shoaee, S. (2018). A Shockley-Type Polymer: Fullerene Solar Cell. Advanced Energy Materials, 8(7), 1701450
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Zhang, K., Chen, Z., Armin, A., Dong, S., Xia, R., Yip, H., Shoaee, S., Huang, F., & Cao, Y. (2018). Efficient Large Area Organic Solar Cells Processed by Blade-Coating With Single-Component Green Solvent. Solar RRL, 2(1), 1700169
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Armin, A., Durrant, J., & Shoaee, S. (2017). Interplay Between Triplet-, Singlet-Charge Transfer States and Free Charge Carriers Defining Bimolecular Recombination Rate Constant of Organic Solar Cells. The Journal of Physical Chemistry C, 121(25), 13969-13976.
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Armin, A., Shoaee, S., Lin, Q., Burn, P., & Meredith, P. (2017). On the unipolarity of charge transport in methanofullerene diodes. npj Flexible Electronics, 1(1)
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Armin, A., Stoltzfus, D., Donaghey, J., Clulow, A., Nagiri, R., Burn, P., Gentle, I., & Meredith, P. (2017). Engineering dielectric constants in organic semiconductors. Journal of Materials Chemistry C, 5(15), 3736-3747.
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Stolterfoht, M., Shoaee, S., Armin, A., Jin, H., Kassal, I., Jiang, W., Burn, P., & Meredith, P. (2017). Electric Field and Mobility Dependent First-Order Recombination Losses in Organic Solar Cells. Advanced Energy Materials, 7(4), 1601379
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Gendron, D., Maasoumi, F., Armin, A., Pattison, K., Burn, P., Meredith, P., Namdas, E., & Powell, B. (2017). A thiocarbonyl-containing small molecule for optoelectronics. RSC Advances, 7(17), 10316-10322.
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García de Arquer, F., Armin, A., Meredith, P., & Sargent, E. (2017). Solution-processed semiconductors for next-generation photodetectors. Nature Reviews Materials, 2, 16100
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Schneider, T., Limberg, F., Yao, K., Armin, A., Jürgensen, N., Czolk, J., Ebenhoch, B., Friederich, P., Wenzel, W., Behrends, J., Krüger, H., & Colsmann, A. (2017). p-Doping of polystyrene polymers with attached functional side-groups from solution. Journal of Materials Chemistry C, 5(3), 770-776.
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Lin, Q., Armin, A., Burn, P., & Meredith, P. (2016). Organohalide Perovskites for Solar Energy Conversion. Accounts of Chemical Research, 49(3), 545-553.
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Armin, A., Subbiah, J., Stolterfoht, M., Shoaee, S., Xiao, Z., Lu, S., Jones, D., & Meredith, P. (2016). Reduced Recombination in High Efficiency Molecular Nematic Liquid Crystalline: Fullerene Solar Cells. Advanced Energy Materials, 6(22), 1600939
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Lin, Q., Armin, A., Burn, P., & Meredith, P. (2016). Near infrared photodetectors based on sub-gap absorption in organohalide perovskite single crystals. Laser & Photonics Reviews, 10(6), 1047-1053.
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Stolterfoht, M., Armin, A., Philippa, B., & Neher, D. (2016). The Role of Space Charge Effects on the Competition between Recombination and Extraction in Solar Cells with Low-Mobility Photoactive Layers. The Journal of Physical Chemistry Letters, 7(22), 4716-4721.
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Stoltzfus, D., Donaghey, J., Armin, A., Shaw, P., Burn, P., & Meredith, P. (2016). Charge Generation Pathways in Organic Solar Cells: Assessing the Contribution from the Electron Acceptor. Chemical Reviews, 116(21), 12920-12955.
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Stolterfoht, M., Armin, A., Shoaee, S., Kassal, I., Burn, P., & Meredith, P. (2016). Slower carriers limit charge generation in organic semiconductor light-harvesting systems. Nature Communications, 7(1), 11944
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Hambsch, M., Lin, Q., Armin, A., Burn, P., & Meredith, P. (2016). Efficient, monolithic large area organohalide perovskite solar cells. Journal of Materials Chemistry A, 4(36), 13830-13836.
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Vuuren, R., Armin, A., Pandey, A., Burn, P., & Meredith, P. (2016). Organic Photodiodes: The Future of Full Color Detection and Image Sensing. Advanced Materials, 28(24), 4766-4802.
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Lin, Q., Stoltzfus, D., Armin, A., Burn, P., & Meredith, P. (2016). An Hydrophilic Anode Interlayer for Solution Processed Organohalide Perovskite Solar Cells. Advanced Materials Interfaces, 3(2), 1500420
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Lin, Q., Armin, A., Nagiri, R., Burn, P., & Meredith, P. (2015). Electro-optics of perovskite solar cells. Nature Photonics, 9(2), 106-112.
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Lin, Q., Armin, A., Burn, P., & Meredith, P. (2015). Filterless narrowband visible photodetectors. Nature Photonics, 9(10), 687-694.
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Basiri-Esfahani, S., Myers, C., Armin, A., Combes, J., Milburn, G., & Basiri Esfahani, S. (2015). Integrated quantum photonic sensor based on Hong-Ou-Mandel interference. Optics Express, 23(12), 16008
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Armin, A., Vuuren, R., Kopidakis, N., Burn, P., & Meredith, P. (2015). Narrowband light detection via internal quantum efficiency manipulation of organic photodiodes. Nature Communications, 6, 6343
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Lin, Q., Armin, A., Lyons, D., Burn, P., & Meredith, P. (2015). Low Noise, IR-Blind Organohalide Perovskite Photodiodes for Visible Light Detection and Imaging. Advanced Materials, 27(12), 2060-2064.
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Armin, A., Kassal, I., Shaw, P., Hambsch, M., Stolterfoht, M., Lyons, D., Li, J., Shi, Z., Burn, P., & Meredith, P. (2014). Spectral Dependence of the Internal Quantum Efficiency of Organic Solar Cells: Effect of Charge Generation Pathways. Journal of the American Chemical Society, 136(32), 11465-11472.
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Armin, A., Zhang, Y., Burn, P., Meredith, P., Pivrikas, A., Meredith, P., & Armin, A. (2013). Measuring internal quantum efficiency to demonstrate hot exciton dissociation. Nature Materials, 12(7), 593-593.
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Kerremans, R., Kaiser, C., Li, W., Zarrabi, N., Meredith, P., & Armin, A. (n.d.) The Optical Constants of Solution‐Processed Semiconductors—New Challenges with Perovskites and Non‐Fullerene Acceptors. Advanced Optical Materials, 2000319
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Yazmaciyan, A., Meredith, P., & Armin, A. (n.d.) Cavity Enhanced Organic Photodiodes with Charge Collection Narrowing. Advanced Optical Materials, 1801543
Supervision
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Glass as an Advanced Optoelectronic Interface (current)
PhDOther supervisor: Prof Paul Meredith -
Suppressing Rayleigh Scatter in Levitated Optomechanics (current)
PhDOther supervisor: Dr James Bateman -
Bayesian Inference and Optimal Estimation in Levitated Optomechanics (current)
PhDOther supervisor: Dr James Bateman -
Charge Generation and Recombination Processes in Organic and Perovskite Semiconductors (current)
PhDOther supervisor: Prof Paul MeredithOther supervisor: Dr Oskar Sandberg -
Advanced Functional Coatings for Integrative Semiconductor Materials and Devices. (current)
PhDOther supervisor: Dr Gregory BurwellOther supervisor: Dr Matthew ElwinOther supervisor: Prof Paul Meredith -
Probing the charge generation and recombination in thin-film, optoelectronic devices (awarded 2022)
PhDOther supervisor: Prof Paul Meredith -
Understanding and Engineering of Sub-gap States in Photodetection (awarded 2022)
PhDOther supervisor: Prof Paul Meredith -
Excitation dynamics and losses in solution processed disordered semiconductors (awarded 2021)
PhDOther supervisor: Prof Kenith MeissnerOther supervisor: Prof Paul Meredith -
Opto-Electrical Interactions in Next Generation Semiconductor Thin Films and Devices (awarded 2021)
PhDOther supervisor: Prof Kenith MeissnerOther supervisor: Prof Paul Meredith -
The Thermodynamics of Indoor Photovoltaics (current)
MScOther supervisor: Prof Paul Meredith -
Development of planar high-performance transparent conductive electrodes for optoelectronic applications (awarded 2022)
MScOther supervisor: Prof Paul Meredith -
Area Scaling of Thin Film Organic Solar Cells (awarded 2020)
MScOther supervisor: Prof Paul Meredith
Taught Modules
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PH-300 Semiconductor Device Physics
This module covers semiconductor device physics with the emphasis on the "next generation" solar cells made of disordered semiconductors.
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SC-M02 Next Generation Semiconductor Applications
We interact with semiconductor devices hundreds of times a day as we connect with the world and with each other. The internet of things (IoT) is connecting more and more devices, creating smart networks for individuals, companies and communities. Semiconductor devices are at the heart of all new technology from smart devices, electric cars and 5G and are vital for the next generation of technologies. This module will discuss the latest device technology and the roadmap to even smaller devices. We will look at applications of these devices in photonics and communications, AI, Energy. The second part of the course will focus on applications of semiconductors and semiconductor technologies for energy generation and storage, transmission and distribution, transport and healthcare.
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SC-M04 Semiconductor Device Physics
This module covers semiconductor device physics with the emphasis on the "next generation" solar cells made of disordered semiconductors.