Upscaling Flexible Semitransparent FAPbBr3-based Perovskite Devices: Optimizing Processing Window to Increase Average Visible Transmittance

Farshad Jafarzadeh^a, Jessica Barichello^a, Luigi Angelo Castriotta^a, Francesca De Rossi^a, Francesco Di Giacomo^a, Aldo Di Carlo^a^,^b, Francesca Brunetti^a, Fabio Matteocci^a

^aCHOSE (Centre for Hybrid and Organic Solar Energy), Department of Electronic Engineering, University of Rome Tor Vergata, Roma 00133, Italy

^bCNR-ISM Istituto di Struttura della Materia, via del Fosso del Cavaliere 100, 00133 Rome, Italy

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV23)

London, United Kingdom, 2023 June 12th - 14th

Organizers: Tracey Clarke, James Durrant and Trystan Watson

Poster, Farshad Jafarzadeh, 194
Publication date: 30th March 2023

Semitransparent photovoltaics (ST-PVs) are ideal for building integrated applications because of increased energy efficiency and improved buildings' sustainability. Hybrid organic-inorganic perovskites are promising STPV candidates due to their high efficiency, low cost, and tunable band gap [1]. In addition, perovskites are applicable on flexible substrates that facilitate the integration and deployment of ST-PVs. ST perovskite solar cells (ST-PSCs) have obtained almost 20% efficiency [2, 3] but the narrow bandgap perovskite limits the average visible transparency (AVT) of these solar cells, which is an obstacle to integration with windows. In contrast, wide-bandgap perovskites, such as FAPbBr₃, have high AVT and light utilization efficiency (LUE) [4], making them an ideal choice for windows integration.

Here, we report flexible ST-SCs with PET/ITO/SnO₂/FAPbBr₃/PTAA/ITO architecture. By eliminating the dimethylformamide (DMF) and using dimethyl sulfoxide (DMSO) as solvent, the processing window increased and the AVT of the devices improved. Flexible devices showed up to 60% AVT and delivered the maximum power conversion efficiency (PCE) of 4.5%. In addition, ST perovskite modules with 3 cm² active area were fabricated and 4% PCE is obtained which is the first ever reported flexible FAPbBr₃ modules to the best of our knowledge. The next step will be development of flexible FAPbBr₃ devices using blade coating [4].

References:

[1] Lou, J; Feng, J; Liu S F; Qin, Y. Semitransparent Perovskite Solar Cells for Photovoltaic Application. Sol. RRL 2023, 7, 2200708.

[2] Yang, D; Zhang, X ; Hou, Y; Wang, K; Ye, T; Yoon, J; Wu, C; Sanghadasa, M; Liu, S F; Priya, S. 28.3%-efficiency perovskite/silicon tandem solar cell by optimal transparent electrode for high efficient semitransparent top cell. Nano Energy 84 (2021) 105934.

[3] Almora, O.; Baran, D.; Bazan, G. C.; Cabrera, C. I.; Erten-Ela, S.; Forberich, K.; Guo, F.; Hauch, J.; Ho-Baillie, A. W. Y.; Jacobsson, T. J.; Janssen, R. A. J.; Kirchartz, T.; Kopidakis, N.; Loi, M. A.; Lunt, R. R.; Mathew, X.; McGehee, M. D.; Min, J.; Mitzi, D. B.; Nazeeruddin, M. K.; Nelson, J.; Nogueira, A. F.; Paetzold, U. W.; Rand, B. P.; Rau, U.; Snaith, H. J.; Unger, E.; Vaillant-Roca, L.; Yang, C.; Yip, H.-L.; Brabec, C. J. Device Performance of Emerging Photovoltaic Materials (Version 3). Adv. Energy Mater. 2023, 13, 2203313.

[4] Barichello, J; Di Girolamo, D; Nonni, E; Paci, B; Generosi, A; Kim, M; Levtchenko, A; Cacovich, S; Di Carlo, A; Matteocci, F. Semi-Transparent Blade-Coated FAPbBr3 Perovskite Solar Cells: A Scalable Low-Temperature Manufacturing Process under Ambient Condition. Sol. RRL 2022, 2200739.

Acknowledgements:

Authors would like to acknowledge the European Union’s Horizon 2020 Research and Innovation Program under grant agreement no. 763989 APOLO and no. 101007084 CITYSOLAR. The financial support of Lazio Region through ISIS@MACH (IR approved by Giunta Regionale n. G10795, 7 August 2019 published by BURL n. 69 27 August 2019).

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