Affiliation:
1. Key Laboratory for Material Chemistry of Energy Conversion and Storage Ministry of Education Hubei Key Laboratory of Material Chemistry and Service Failure School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan 430074 P. R. China
2. Department of Chemistry City University of Hong Kong Kowloon 999077 Hong Kong
3. Center for Advanced Material Diagnostic Technology and College of Engineering Physics Shenzhen Technology University Shenzhen 518118 P. R. China
4. Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518000 P. R. China
Abstract
AbstractNiOx is one of the promising inorganic hole transporting materials in inverted perovskite solar cells (PSCs), however, its device efficiency and stability are still limited by the energy level mismatch, low intrinsic conductivity, high interface defect density, and complex active species. Herein, the use of an imide‐based donor–acceptor type semiconductor (BTF14) as the interlayer between perovskite and NiOx is proposed, which facilitates the hole extraction and transfer, reduces the defect density at interface and in perovskite film bulk, and further reduces the concentration of Ni>3+ species to stabilize the heterointerface. As a result, the power conversion efficiency of inverted PSCs can be significantly boosted from 22.11% of NiOx to 24.20% of NiOx/BTF14. Moreover, NiOx/BTF14 based devices also exhibit negligible hysteresis and excellent long‐term stability, with over 77% of their initial efficiency remaining after continuous operation at 60 °C for 1000 h under 1 sun illumination.
Funder
National Natural Science Foundation of China
Innovation and Technology Fund
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials