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

被引：268

作者：

Tan, Kwan Wee ^{[1
]}

Moore, David T. ^{[1
]}

Saliba, Michael ^{[3
]}

Sai, Hiroaki ^{[1
]}

Estroff, Lora A. ^{[1
]}

Hanrath, Tobias ^{[2
]}

Snaith, Henry J. ^{[3
]}

Wiesner, Ulrich ^{[1
]}

机构：

[1] Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA

[2] Cornell Univ, Sch Chem & Biomol Engn, Ithaca, NY 14853 USA

[3] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

来源：

ACS NANO | 2014年 / 8卷 / 05期

基金：

美国国家科学基金会;

关键词：

structural evolution; thermal annealing; self-assembly; block copolymer; hybrid perovskite; crystalline precursor; thin film solar cells; EFFICIENT; FILM; ELECTRON; TIO2; CONVERSION; PRINCIPLES; TRANSPORT; MECHANISM; LENGTHS;

D O I：

10.1021/nn500526t

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：4730 / 4739

页数：10

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