Journal
NANO ENERGY
Volume 48, Issue -, Pages 117-127Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2018.03.047
Keywords
Ordered structure; Strain; Crystallization; Substitution; Perovskite solar cell
Categories
Funding
- 973 Program of China [2014CB643506]
- China Scholarship Council [201506165038]
- Natural Science Foundation of China [51661135023, 21673091]
- Natural Science Foundation of Hubei Province [ZRZ2015000203]
- Technology Creative Project of Excellent Middle & Young Team of Hubei Province [T201511]
- Wuhan National High Magnetic Field Center [2015KF18]
- Air Force Office of Scientific Research [FA9550-15-1-0333]
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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.
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