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Rationally Induced Interfacial Dipole in Planar Heterojunction Perovskite Solar Cells for Reduced J – V Hysteresis
Author(s) -
Liu Zonghao,
Chen Qi,
Lee JinWook,
Zhao Zhixin,
Xu Xiaobao,
Hsieh YaoTsung,
Meng Lei,
Sun Pengyu,
Marco Nicholas De,
Zhou Huanping,
Cheng YiBing,
Yang Yang
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.201800568
Subject(s) - perovskite (structure) , hysteresis , materials science , dipole , heterojunction , charge carrier , perovskite solar cell , condensed matter physics , solar cell , photovoltaic system , optoelectronics , planar , electrode , energy conversion efficiency , engineering physics , nanotechnology , electrical engineering , chemical engineering , physics , computer science , chemistry , computer graphics (images) , quantum mechanics , engineering
Abstract With the rapid progress in developing hybrid perovskite solar cells, the allure of current density–voltage ( J – V ) hysteresis has attracted quite a lot of interest in the research community. It requires feasible approaches that further deepen the fundamental understanding of device physics in specific device architecture in order to solve this problem eventually. Here, perovskite solar cells configured with different counter electrodes are systematically investigated with the focus on charge accumulation within the devices responsible for J – V hysteresis. The results indicate that J – V hysteresis is affected by charge accumulation which can be modulated by carrier extraction efficiency of the electrodes. Through a rationally induced interfacial dipole, the devices have shown improvement in carrier extraction, which thus reduces J – V hysteresis significantly. It provides solid evidence for the proposition that interface charge plays an important role in J – V hysteresis, and demonstrates an applicable strategy that effectively alleviates J – V hysteresis in perovskite solar cells.