Suppressing the Interface Photodegradation towards Efficient and Stable All Perovskite Tandem Solar Cells
Abstract
Abstract All perovskite tandem solar cells (PTSCs) were expected to overcome the Shockley‐Queisser limit of single‐junction perovskite solar cells (PSCs). Nevertheless, wide bandgap (WBG) subcells suffer from large photovoltage loss and device instability due to extensive film defect, interfacial degradation and phase segregation. Herein, a polymeric multi‐dentate anchoring (PMDA) strategy by introducing poly(carbazole phosphonic acid) was employed to engineer the bottom interface and suppress phase segregation. The reinforced and homogeneous anchorage by multiple repeat phosphonic acid groups onto NiO x significantly optimised the bottom interface, suppressing unfavourable interfacial reactions and thus alleviating phase segregation of WBG perovskite. As a result, the PMDA‐modified WBG PSCs showed higher power conversion efficiency (PCE) than the control device (19.84% vs. 18.18%), along with better device photostability ( T 80 = 1200 vs. 500 h). Coupled with narrow bandgap (NBG) PSCs, the PMDA‐modified PTSCs reached a PCE of up to 28.51% with device operation photostability over 700 h ( T 80 ).
Article Details
Authors (13)
Zhuojia Lin
School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Basic Research Center of Excellence for Energy and Information Polymer Materials. Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling South China University of Technology Guangzhou 510000 P.R. China
Jianwei Chen
Kezhou Fan
Department of Physics, The Hong Kong University of Science and Technology, Clearwater Bay, Hong Kong 999077, China
Jicheng Yi
Honggang Chen
Department of Chemistry, Shanghai Stomatological Hospital and School of Stomatology, State Key Laboratory of Coatings for Advanced Equipment, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University
Shibing Zou
School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Basic Research Center of Excellence for Energy and Information Polymer Materials. Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling South China University of Technology Guangzhou 510000 P.R. China
Hongyu Min
School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Basic Research Center of Excellence for Energy and Information Polymer Materials. Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling South China University of Technology Guangzhou 510000 P.R. China
Yitong Xu
Man Yu Lam
Department of Physics and William Mong Institute of Nano Science and Technology The Hong Kong University of Science and Technology Clear Water Bay, Kowloon Hong Kong 999077 P.R. China
Sergeev A. Aleksandr
Department of Physics and William Mong Institute of Nano Science and Technology The Hong Kong University of Science and Technology Clear Water Bay, Kowloon Hong Kong 999077 P.R. China
Kam Sing Wong
He Yan
Keyou Yan