Citation: Kong Mengqin, Hu Hang, Egbo Kingsley, Dong Binghai, Wan Li, Wang Shimin. Anti-solvent assisted treatment for improved morphology and efficiency of lead acetate derived perovskite solar cells[J]. Chinese Chemical Letters, ;2019, 30(6): 1325-1328. doi: 10.1016/j.cclet.2019.03.006 shu

Anti-solvent assisted treatment for improved morphology and efficiency of lead acetate derived perovskite solar cells

Kong Mengqin ^a,b ,
Hu Hang ^b,c,d,*, ,
Egbo Kingsley ^a ,
Dong Binghai ^d,**, ,
Wan Li ^d,**, ,
Wang Shimin ^d

a.
Department of Physics, City University of Hong Kong, Hong Kong 999077, China
b.
Institute of Microstructure Technology, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen 76344, Germany
c.
Light Technology Institute, Karlsruhe Institute of Technology, Karlsruhe 76131, Germany
d.
Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University, Wuhan 430062, China

^**

hang.hu@kit.edu

wwwdbh@163.com

wanli@hubu.edu.cn

Received Date: 18 January 2019
Revised Date: 28 February 2019
Accepted Date: 4 March 2019
Available Online: 5 June 2019

Figures(3)

An efficient solution-processable route employing Pb(Ac)₂ as lead source and anti-solvent treatment to achieve fully covered and homogenous perovskite films is reported. The effect of different solution methods and device architectures on the morphologies of perovskite films were systematically investigated. Our results show that the planar perovskite layer fabricated by one-step solution method achieved fully covered and pinhole-free films. Further anti-solvent treatment using chlorobenzene (CB) promoted a perovskite film with highly smooth surfaces and enlarged grain sizes. Device fabricated from CB treated perovskite film achieved a best PCE of 15.80%, in comparison with 14.02% for the untreated device. These results evidently suggest a feasible route towards controlling the crystallization and morphology of planar heterojunction (PHJ) PSCs for improved efficiency.
- Lead acetate derived perovskite,
- Anti-solvent process,
- Chlorobenzene,
- Improved morphology,
- Enlarged grain sizes
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