Premium
Low‐Temperature Solution‐Processed CuCrO 2 Hole‐Transporting Layer for Efficient and Photostable Perovskite Solar Cells
Author(s) -
Zhang Hua,
Wang Huan,
Zhu Hongmei,
Chueh ChuChen,
Chen Wei,
Yang Shihe,
Jen Alex K.Y.
Publication year - 2018
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201702762
Subject(s) - materials science , perovskite (structure) , non blocking i/o , optoelectronics , photoactive layer , energy conversion efficiency , indium tin oxide , layer (electronics) , indium , nanocrystal , nanotechnology , chemical engineering , polymer solar cell , catalysis , engineering , biochemistry , chemistry
Organic–inorganic hybrid perovskite solar cells (PVSCs) have become the front‐running photovoltaic technology nowadays and are expected to profoundly impact society in the near future. However, their practical applications are currently hampered by the challenges of realizing high performance and long‐term stability simultaneously. Herein, the development of inverted PVSCs is reported based on low temperature solution‐processed CuCrO 2 nanocrystals as a hole‐transporting layer (HTL), to replace the extensively studied NiO x counterpart due to its suitable electronic structure and charge carrier transporting properties. A ≈45 nm thick compact CuCrO 2 layer is incorporated into an inverted planar configuration of indium tin oxides (ITO)/c‐CuCrO 2 /perovskite/[6,6]‐phenyl‐C61‐butyric acid methyl ester (PCBM)/bathocuproine (BCP)/Ag, to result in the high steady‐state power conversion efficiency of 19.0% versus 17.1% for the typical low temperature solution‐processed NiO x ‐based devices. More importantly, the optimized CuCrO 2 ‐based device exhibits a much enhanced photostability than the reference device due to the greater UV light‐harvesting of the CuCrO 2 layer, which can efficiently prevent the perovskite film from intense UV light exposure to avoid associated degradation. The results demonstrate the promising potential of CuCrO 2 nanocrystals as an efficient HTL for realizing high‐performance and photostable inverted PVSCs.