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Updated: Jan 14, 2026
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
Buried Interface Modification for High Performance and Stable Inverted Perovskite Solar Cells
Fei Song1, Nan Yan1, Yang Cao1
1Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, P.R. China.
Abstract:
Residual stress can cause distortion of the perovskite lattice, resulting in the formation of local defects such as dislocation and vacancy. These defects serve as non-radiative recombination centers and significantly affect the stability of perovskite films. In this study, triphenylamine derivative (TAPC) was designed as an effective passivating agent. The resulting modified molecular layer established a gradient arrangement of thermal expansion coefficients between the hole transport layer (HTL) and the perovskite, effectively mitigating stress accumulation within the perovskite film. This modification concurrently enhanced hole transport capability and optimized the energy level alignment. Consequently, the power conversion efficiency (PCE) of the optimized perovskite solar cell (PSCs) increased from 24.22% to 26.05%, with the fill factor (FF) rising from 83.2% to 85.2%. Furthermore, the device achieved the lowest open-circuit voltage (Voc) loss reported for comparable 1.55 eV bandgap PSCs, while maintaining excellent long-term stability. Importantly, this strategy also enabled a corresponding flexible PSC (F-PSCs) to achieve a remarkable PCE of 24.39%. Collectively, these results demonstrate a promising pathway for buried interface modification of perovskite films and the fabrication of high-performance F-PSCs.
