Optimizing the NiOx/Au Interface via Postannealing of the All‐Inorganic CsPbIBr2 Perovskite Solar Cells for High Efficiency. Issue 4 (27th October 2021)

• Record Type: Journal Article
• Authors: Sheng, Guizhang; Wang, Jixi; Xiao, Xiudi; Cai, Xuesong; Wang, Xiaoman; Bi, Zhuoneng; Lu, Yuan; Liu, Yangbiao; Zhu, Yanqing; Xu, Xueqing; Xu, Gang
• Is Part Of: Advanced engineering materials. Volume 24:Issue 4(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-10-27
• Subjects: all-inorganic perovskite solar cells -- CsPbIBr2 perovskites -- postannealing; Materials -- Periodicals; 620.11
• DOI: 10.1002/adem.202100962
• Languages: English
• ISSNs: 1438-1656

Abstract

Abstract : All‐inorganic perovskite solar cells (PSCs) have been demonstrated to solve the thermal instability problem of organic–inorganic hybrid PSCs. Therefore, NiO x film is prepared by electron beam evaporation as a hole transport layer of all inorganic CsPbIBr2 PSCs. Then, the postannealing is used to promote the diffusion of NiO x into the gold electrode, and enhance interface contact and reducing the electrical resistance of NiO x /Au. After optimizing NiO x /Au interface, the devices based on NiO x achieved a power conversion efficiency (PCE) of 6.7%. Furthermore, the best all‐inorganic CsPbIBr2 PSC free of encapsulation retains 95% of initial efficiency over 100 h at 85 °C. Herein, an effective postannealing strategy is provided for optimized NiO x /Au interface to make stable and efficient all‐inorganic CsPbIBr2 PSCs. Abstract : The postannealing is used to promote the diffusion of NiO x into the gold electrode, and enhance interface contact and reducing the electrical resistance of NiO x /Au. The devices based on NiO x achieved a power conversion efficiency (PCE) of 6.7%. Furthermore, the best all‐inorganic CsPbIBr2 PSC free of encapsulation retains 95% of initial efficiency over 100 h at 85 °C.