The role of a vapor-assisted solution process on tailoring the chemical composition and morphology of mixed-halide perovskite solar cells

被引：6
作者：
Tafazoli, S. [1 ]
Timasi, N. [1 ]
Nouri, E. [1 ]
Mohammadi, M. R. [1 ]
机构：
[1] Sharif Univ Technol, Dept Mat Sci & Engn, Azadi Ave, Tehran, Iran
来源：
CRYSTENGCOMM | 2018年 / 20卷 / 31期
关键词：
SUBSTITUTED COPPER PHTHALOCYANINE; GRAPHENE-OXIDE; EFFICIENT; CH3NH3PBI3; DEPOSITION; CHLORIDE; LAYER; FILMS;
D O I：
10.1039/c8ce00628h
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Herein, we report a modified two-step method to construct a uniform and pinhole-free polycrystalline perovskite film with large grains up to the microscale using lead mixed-halide (PbI2-PbCl2) precursor solutions to guarantee the device functioning. Commonly used sequential deposition methods based on dip- and spin-coatings are combined with a vapor-assisted solution process to improve the perovskite morphology and tune the residual lead mixed-halides. These can enhance the optical absorption and efficiency of perovskite solar cell (PSC) devices. The impact of the Cl content in the lead mixed-halide precursors and the employed preparation methods on the photovoltaic performance of PSCs are studied. The highest performance of PSC is obtained for a vapor-treated film containing 2 mol% PbCl2 deposited by spin-coating, showing a 56% increase in photoconversion efficiency compared to the pristine PbI2-based device.
引用
收藏
页码：4428 / 4435
页数：8
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