Thermally induced structural evolution and performance of mesoporous block copolymer-directed alumina perovskite solar cells.

Thermally induced structural evolution and performance of mesoporous block copolymer-directed alumina perovskite solar cells.
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DOI:
10.1021/nn500526t
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发表时间:
2014-05-27
期刊:
影响因子:
17.1
通讯作者:
Wiesner, Ulrich
Wiesner, Ulrich
中科院分区:
材料科学1区
文献类型:
--
作者:
Tan, Kwan Wee;Moore, David T.;Saliba, Michael;Sai, Hiroaki;Estroff, Lora A.;Hanrath, Tobias;Snaith, Henry J.;Wiesner, Ulrich

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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 (CH3NH3PbI3–xClx) in mesoporous block copolymer derived alumina superstructures during thermal annealing. We show the CH3NH3PbI3–xClx 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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