The control of surface texture for planar CH sub(3)NH sub(3)PbI sub(3 -x)Cl sub(x) film and its effect on photovoltaic performance

The surface texture with a long alignment was observed on the surface of CH sub(3)NH sub(3)PbI sub(3 -x)Cl sub(x) films prepared using one-step solution deposition. We found that it appears only when hydroiodic acid with stabilizer H sub(3)PO sub(2) is adopted to prepare CH sub(3)NH sub(3)I powder....

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2016-09, Vol.27 (9), p.9384-9390
Main Authors: Wang, Wenzhen, Xu, Haitao, Xu, Wenqiang, Wu, Yanglin, Cao, Runan, Zhu, Jiabin, Fang, Zebo, Hong, Feng, Xu, Run, Xu, Fei, Wang, Linjun, Huang, Jian, Lu, Yicheng
Format: Article
Language:English
Subjects:
Annealing
Diffusion rate
Electronics
Materials science
Photovoltaic cells
Solar cells
Surface layer
Texture
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Summary:The surface texture with a long alignment was observed on the surface of CH sub(3)NH sub(3)PbI sub(3 -x)Cl sub(x) films prepared using one-step solution deposition. We found that it appears only when hydroiodic acid with stabilizer H sub(3)PO sub(2) is adopted to prepare CH sub(3)NH sub(3)I powder. However, even with this stabilizer, the surface texture of CH sub(3)NH sub(3)PbI sub(3 -x)Cl sub(x) films can also be eliminated completely by sufficiently lateral diffusion before annealing, which can be achieved by high speed coating above 3000 rpm or drying for 30 min at room temperature. The later process results in a smooth surface with homogeneous grains and hence the improvement of photovoltaic performance.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-016-4981-8