Achieving ordered and stable binary metal perovskite via strain engineering

作者：Shai, Xuxia; Wang, Jinsong; Sun, Pengyu; Huang, Wenchao; Liao, Peizhe; Cheng, Feng; Zhu, Bowen; Chang, Sheng-Yung; Yao, En-Ping; Shen, Yan; Miao, Ling; Yang, Yang; Wang, Mingkui^*

来源：Nano Energy, 2018, 48: 117-127.

DOI：10.1016/j.nanoen.2018.03.047

• Ordered structure
• Strain
• Crystallization
• Substitution
• Perovskite solar cell

Strain effects on vacancies, electronic states and stability have been disclosed for perovskite structured materials (ABX(3)) including metal oxides and organic-inorganic hybrids critical for energy storage and generation. Ion substitution has been pursued as an attractive solution to alter the crystallization or induced electronic of organic-inorganic hybrid halide lead perovskite. However, the disorganized structure of perovskite result from inappropriate substitution may cause unwanted phase transition and photo-stability. Herein, we introduce crystallization of restriction ABX(3) composition with moderate zinc (Zn) substitution to obtain the ordered and stable CH3NH3(Zn: Pb)I3-xClx crystal, which is achieved via releasing lattice strain during an appropriate lattice constriction within BX6 octahedron. We obtained an unprecedented efficiency of 20.06% under simulated sunlight with facilitating binary metal perovskite of CH3NH3(1Zn: 100Pb)I3-xClx. Our results are important to realize scale up and practical applications of efficient planar perovskite solar cells.

• 出版日期2018-6
• 单位华中科技大学