Статья

Thermally Induced Structural Evolution and Performance of Mesoporous Block Copolymer-Directed Alumina Perovskite Solar Cells

Kwan Wee TanDepartment of Materials Science and Engineering,David T. MooreDepartment of Materials Science and Engineering,Michael SalibaClarendon Laboratory, Department of Physics, University of Oxford, Oxford, OX1 3PU, U.KHiroaki SaiDepartment of Materials Science and Engineering,Lara A. EstroffDepartment of Materials Science and Engineering,Tobias HanrathSchool of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United StatesHenry J. SnaithClarendon Laboratory, Department of Physics, University of Oxford, Oxford, OX1 3PU, U.KUlrich WiesnerDepartment of Materials Science and Engineering,

2014en

ABI

Аннотация

Structure control in solution-processed hybrid perovskites is crucial to design and fabricate highly efficient solar cells. Here, we utilize in situ grazing incidence wide-angle X-ray scattering and scanning electron microscopy to investigate the structural evolution and film morphologies of methylammonium lead tri-iodide/chloride (CH3NH3PbI(3-x)Cl(x)) in mesoporous block copolymer derived alumina superstructures during thermal annealing. We show the CH3NH3PbI(3-x)Cl(x) material evolution to be characterized by three distinct structures: a crystalline precursor structure not described previously, a 3D perovskite structure, and a mixture of compounds resulting from degradation. Finally, we demonstrate how understanding the processing parameters provides the foundation needed for optimal perovskite film morphology and coverage, leading to enhanced block copolymer-directed perovskite solar cell performance.

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Идентификаторы

DOI: 10.1021/nn500526t

Цитирования и источники

Цитирований: 3Использованных источников: 0

Показатели — AkademScholar