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Growing large columnar grains of CH3NH3PbI3using the solid-state reaction method enhanced by less-crystallized nanoporous PbI2films
Zheng, Huifeng1,2; Wang, Weiqi1,2; Liu, Yangqiao1,3; Sun, Jing1
2017
Source PublicationJournal of Power Sources
ISSN03787753
Volume344Pages:46-55
AbstractCompact, pinhole-free and PbI2-free perovskite films, are desirable for high-performance perovskite solar cells (PSCs), especially if large columnar grains are obtained in which the adverse effects of grain boundaries will be minimized. However, the conventional solid-state reaction methods, originated from the two-step method, failed to grow columnar grains of CH3NH3PbI3in a facile way. Here, we demonstrate a strategy for growing large columnar grains of CH3NH3PbI3, by less-crystallized nanoporous PbI2(ln-PbI2) film enhanced solid-state reaction method. We demonstrated columnar grains were obtainable only when ln-PbI2films were applied. Therefore, the replacement of compact PbI2by ln-PbI2in the solid-sate reaction, leads to higher power conversion efficiency, better reproducibility, better stability and less hysteresis. Furthermore, by systematically investigating the effects of annealing temperature and duration, we found that an annealing temperature ≥120 °C was also critical for growing columnar grains. With the optimal process, a champion efficiency of 16.4% was obtained and the average efficiency reached 14.2%. Finally, the mechanism of growing columnar grains was investigated, in which a VPb″-assisted hooping model was proposed. This work reveals the origins of grain growth in the solid-state reaction method, which will contribute to preparing high quality perovskite films with much larger columnar grains. © 2017 Elsevier B.V.
DOI10.1016/j.jpowsour.2017.01.108
EI Accession Number20170703354805
EI KeywordsIodine compounds
EI Classification Number482.2 Minerals - 702.3 Solar Cells - 802.2 Chemical Reactions - 913.1 Production Engineering - 933.1.2 Crystal Growth
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Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25813
Collection中国科学院上海硅酸盐研究所
Affiliation1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai; 200050, China;
2.University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing; 100049, China;
3.Suzhou Institute of SICCAS (Shanghai Institute of Ceramics, Chinese Academy of Sciences), 238 North Changchun Road, Taicang; Jiangsu Province; 215499, China
Recommended Citation
GB/T 7714
Zheng, Huifeng,Wang, Weiqi,Liu, Yangqiao,et al. Growing large columnar grains of CH3NH3PbI3using the solid-state reaction method enhanced by less-crystallized nanoporous PbI2films[J]. Journal of Power Sources,2017,344:46-55.
APA Zheng, Huifeng,Wang, Weiqi,Liu, Yangqiao,&Sun, Jing.(2017).Growing large columnar grains of CH3NH3PbI3using the solid-state reaction method enhanced by less-crystallized nanoporous PbI2films.Journal of Power Sources,344,46-55.
MLA Zheng, Huifeng,et al."Growing large columnar grains of CH3NH3PbI3using the solid-state reaction method enhanced by less-crystallized nanoporous PbI2films".Journal of Power Sources 344(2017):46-55.
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