Trivalent Ni oxidation controlled through regulating lithium content to minimize perovskite interfacial recombination

• 作者: Jin-Jin Zhao Xiao Su Zhou Mi Ying Zhang Yan-Jun Hu Hua-Jun Guo Yi-Nan Jiao Yu-Xia Zhang Yan Shi Wei-Zhong Hao Jing-Wei Wu Yi Wang Cun-Fa Gao Guo-Zhong Cao
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: RARE METALS(Monthly)
• 页码范围: 96-105
• 页数: 10页
• 语种: 英文

摘要

Organic-inorganic hybrid perovskite solar cells,one of the most promising photovoltaic devices,have made great progress in their efficiency and preparation technol-ogy.In this study,uniform,highly conductive LinNiOx (0≤ n ≤ 1;0＜ x ≤ 3) films were prepared by electrochem-ical deposition for a range of Li concentration.Photo-voltaic performance for the perovskite solar cells was enhanced through incorporation of the ion pair of Ni3+(-) Ni2+ as the interfacial passivation.Depending on the amount of lithium doping,controlled interfacial oxidation was induced by Ni3+.The Li0.32NiOx inhibited charge recombination,reduced the defect density,and enhanced the photocurrent density.A maximum power conversion efficiency of 20.44％ was obtained by Li0.32NiOx.Further,in the long-term,in-air stabilities of unencapsulated Lin-NiOx perovskite solar cells were demonstrated.