Solvent engineering for high-quality perovskite solar cell with an efficiency approaching 20%
Solvent engineering for high-quality perovskite solar cell with an efficiency approaching 20%
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溶剂%20工程%20用于%20高质量%20钙钛矿%20太阳能%20电池%20with%20an%20效率%20接近%2020%
DOI:
10.1016/j.jpowsour.2017.08.074
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发表时间:
2017-10
影响因子:
9.2
通讯作者:
Wu JH
中科院分区:
文献类型:
--
作者:
Wu Tongyue;Wu Jihuai;Tu Yongguang;He Xin;Lan Zhang;Huang Miaoliang;Lin Jianming;Wu JH
The perovskite layer is the most crucial factor for the high performance perovskite solar cells. Based on solvent engineering, we develop a ternary-mixed-solvent method for the growth of high-quality [Cs0.05(MA0.17FA0.83)0.95Pb(I0.83Br0.17)3] cation-anion-mixed perovskite films by introducingN-methyl-2-pyrrolidone (NMP) into the precursor mixed solution. By controlling rapid nucleation and retarding crystal growth via intermediate phase PbI2-NMP (Lewis acid-base adduct), a dense, large grain, pinhole-free and long charge carrier lifetime perovskite film is obtained. By optimizing the precursor solvent composition, the perovskite solar cell achieves an impressive power conversion efficiency of 19.61% under one-sun illumination. The research presented here provides a facile, low-cost and highly efficient way for the preparation of perovskite solar cells.
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