TY - JOUR
T1 - Semitransparent Perovskite Solar Cells with an Evaporated Ultra‐Thin Perovskite Absorber
AU - Zhang, Zongbao
AU - Ji, Ran
AU - Jia, Xiangkun
AU - Wang, Shu‐Jen
AU - Deconinck, Marielle
AU - Siliavka, Elena
AU - Vaynzof, Yana
N1 - Z.Z. and R.J. are grateful for the financial support by the China Scholarship Council (Scholarship#201806750012 and #201806070145, respectively). Z.Z thanks short-term scholarship from the Graduate Academy of Technische Universität Dresden and the Dresden Center for Nanoanalysis (DCN) for providing access to the SEM measurement. Z.Z appreciates Prof. Alexey Chernikov and Prof. Karl Leo for providing the facility for AFM measurement and transparent electrode evaporation, respectively. Z.Z also thanks Dr. Martin Kroll, Anna-Lena Hofmann, Shaoling Bai, Dr. Juanzi Shi, Dr. Rongjuan Huang, Dr. Fabian Paulus, and Sophia Terres for their insightful and fruitful discussions. S.-J.W. acknowledges funding from DFG Project, WA 4719/2-1 and support from the Hector Fellow Academy. This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (ERC Grant Agreement n° 714067, ENERGYMAPS) and the Deutsche Forschungsgemeinschaft (DFG) in the framework of the Special Priority Program (SPP 2196) project PERFECT PVs (#424216076).
Publisher Copyright:
© 2023 The Authors. Advanced Functional Materials published by Wiley-VCH GmbH.
PY - 2023/10/29
Y1 - 2023/10/29
N2 - Metal halide perovskites are of great interest for application in semitransparent solar cells due to their tunable bandgap and high performance. However, fabricating high‐efficiency perovskite semitransparent devices with high average visible transmittance (AVT) is challenging because of their high absorption coefficient. Here, a co‐evaporation process is adopted to fabricate ultra‐thin CsPbI3 perovskite films. The smooth surface and orientated crystal growth of the evaporated perovskite films make it possible to achieve 10 nm thin films with compact and continuous morphology without pinholes. When integrated into a p‐i‐n device structure of glass/ITO/PTAA/perovskite/PCBM/BCP/Al/Ag with an optimized transparent electrode, these ultra‐thin layers result in an impressive open‐circuit voltage (VOC) of 1.08 V and a fill factor (FF) of 80%. Consequently, a power conversion efficiency (PCE) of 3.6% with an AVT above 50% is demonstrated, which is the first report for a perovskite device of a 10 nm active layer thickness with high VOC, FF and AVT. These findings demonstrate that deposition by thermal evaporation makes it possible to form compact ultra‐thin perovskite films, which are of great interest for future smart windows, light‐emitting diodes, and tandem device applications.
AB - Metal halide perovskites are of great interest for application in semitransparent solar cells due to their tunable bandgap and high performance. However, fabricating high‐efficiency perovskite semitransparent devices with high average visible transmittance (AVT) is challenging because of their high absorption coefficient. Here, a co‐evaporation process is adopted to fabricate ultra‐thin CsPbI3 perovskite films. The smooth surface and orientated crystal growth of the evaporated perovskite films make it possible to achieve 10 nm thin films with compact and continuous morphology without pinholes. When integrated into a p‐i‐n device structure of glass/ITO/PTAA/perovskite/PCBM/BCP/Al/Ag with an optimized transparent electrode, these ultra‐thin layers result in an impressive open‐circuit voltage (VOC) of 1.08 V and a fill factor (FF) of 80%. Consequently, a power conversion efficiency (PCE) of 3.6% with an AVT above 50% is demonstrated, which is the first report for a perovskite device of a 10 nm active layer thickness with high VOC, FF and AVT. These findings demonstrate that deposition by thermal evaporation makes it possible to form compact ultra‐thin perovskite films, which are of great interest for future smart windows, light‐emitting diodes, and tandem device applications.
KW - co-evaporation process
KW - CsPbI3
KW - semitransparent perovskite solar cells
KW - transparent electrodes
KW - ultra-thin perovskites
UR - http://www.scopus.com/inward/record.url?scp=85175026247&partnerID=8YFLogxK
U2 - 10.1002/adfm.202307471
DO - 10.1002/adfm.202307471
M3 - Journal article
SN - 1616-301X
JO - Advanced Functional Materials
JF - Advanced Functional Materials
M1 - 2307471
ER -
