Light-activated interlayer contraction in two-dimensional perovskites for high-efficiency solar cells

被引:64
|
作者
Li, Wenbin [1 ,2 ]
Sidhik, Siraj [1 ,3 ]
Traore, Boubacar [3 ,4 ]
Asadpour, Reza [5 ]
Hou, Jin [6 ]
Zhang, Hao [1 ,2 ]
Fehr, Austin [1 ]
Essman, Joseph [1 ]
Wang, Yafei [1 ]
Hoffman, Justin M. [7 ]
Spanopoulos, Ioannis [7 ]
Crochet, Jared J. [8 ]
Tsai, Esther [9 ]
Strzalka, Joseph [10 ]
Katan, Claudine [4 ]
Alam, Muhammad A. [5 ]
Kanatzidis, Mercouri G. [7 ]
Even, Jacky [5 ]
Blancon, Jean-Christophe [1 ]
Mohite, Aditya D. [1 ,2 ]
机构
[1] Rice Univ, Dept Chem & Biomol Engn, Houston, TX 77005 USA
[2] Rice Univ, Smalley Curl Inst, Appl Phys Program, Houston, TX 77005 USA
[3] Univ Rennes, Inst FOTON, CNRS, INSA Rennes, Rennes, France
[4] Univ Rennes, ISCR Inst Sci Chim Rennes, CNRS, ENSCR,INSA Rennes,UMR 6226, Rennes, France
[5] Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA
[6] Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX USA
[7] Northwestern Univ, Dept Mat Sci & Engn, Dept Chem, Evanston, IL 60208 USA
[8] Los Alamos Natl Lab, Los Alamos, NM USA
[9] Brookhaven Natl Lab, Ctr Funct Nanomat, Brookhaven, NY USA
[10] Argonne Natl Lab, Xray Sci Div, 9700 S Cass Ave, Argonne, IL 60439 USA
基金
美国国家科学基金会;
关键词
ORGANIC-INORGANIC PEROVSKITES; PHYSICS; PERCOLATION;
D O I
10.1038/s41565-021-01010-2
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Understanding and tailoring the physical behaviour of halide perovskites under practical environments is critical for designing efficient and durable optoelectronic devices. Here, we report that continuous light illumination leads to >1% contraction in the out-of-plane direction in two-dimensional hybrid perovskites, which is reversible and strongly dependent on the specific superlattice packing. X-ray photoelectron spectroscopy measurements show that constant light illumination results in the accumulation of positive charges in the terminal iodine atoms, thereby enhancing the bonding character of inter-slab I-I interactions across the organic barrier and activating out-of-plane contraction. Correlated charge transport, structural and photovoltaic measurements confirm that the onset of the light-induced contraction is synchronized to a threefold increase in carrier mobility and conductivity, which is consistent with an increase in the electronic band dispersion predicted by first-principles calculations. Flux-dependent space-charge-limited current measurement reveals that light-induced interlayer contraction activates interlayer charge transport. The enhanced charge transport boosts the photovoltaic efficiency of two-dimensional perovskite solar cells up to 18.3% by increasing the device's fill factor and open-circuit voltage. Light-induced contraction in the out-of-plane direction in two-dimensional (2D) hybrid perovskites enables the realization of high-efficiency 2D perovskite solar cells.
引用
收藏
页码:45 / +
页数:11
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