Composition Engineering in Doctor-Blading of Perovskite Solar Cells

被引:266
作者
Tang, Shi [1 ]
Deng, Yehao [1 ]
Zheng, Xiaopeng [1 ]
Bai, Yang [1 ]
Fang, Yanjun [1 ]
Dong, Qingfeng [1 ]
Wei, Haotong [1 ]
Huang, Jinsong [1 ,2 ]
机构
[1] Univ Nebraska Lincoln, Dept Mech & Mat Engn, Lincoln, NE 68588 USA
[2] Univ N Carolina, Dept Appl Physiccal Sci, Chapel Hill, NC 27599 USA
关键词
composition engineering; doctor-blading; perovskite solar cells; LEAD IODIDE PEROVSKITES; HALIDE PEROVSKITES; PHASE; STABILIZATION; FABRICATION; COST;
D O I
10.1002/aenm.201700302
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Organic-inorganic halide perovskite (OIHP) solar cells with efficiency over 18% power conversion efficiency (PCE) have been widely achieved with lab scale spin-coating method which is however not scalable for the fabrication of large area solar panels. The PCEs of OIHP solar cells made by scalable deposition methods, such as doctor-blading or slot-die coating, have been lagging far behind than spin-coated devices. In this study the authors report composition engineering in doctor-bladed OIHP solar cells with p-i-n planar hetero-junction structure to enhance their efficiency. Phase purer OIHP thin films are obtained by incorporating a small amount of cesium (Cs+) and bromine (Br-) ions into perovskite precursor solution, which also reduces the required film formation temperature. Pinhole free OIHP thin films with micrometer-sized grains have been obtained assisted by a secondary grain growth with added methylammonium chloride into the precursor solution. The OIHP solar cells using these bladed thin films achieved PCEs over 19.0%, with the best stabilized PCE reaching 19.3%. This represents a significant step toward scalable manufacture of OIHP solar cells.
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页数:7
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