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Impacts of alkaline on the defects property and crystallization kinetics in perovskite solar cells
Yihua Chen1; Nengxu Li1; Ligang Wang1; Liang Li1; Ziqi Xu1; Haoyang Jiao1; Pengfei Liu2; Cheng Zhu2; Huachao Zai2; Mingzi Sun3; Wei Zou4; Shuai Zhang5; Guichuan Xing6; Xinfeng Liu5; Jianpu Wang4; Dongdong Li7; Bolong Huang3; Qi Chen2; Huanping Zhou1
Source PublicationNature Communications

Further minimizing the defect state density in the semiconducting absorber is vital to boost the power conversion efficiency of solar cells approaching Shockley-Queisser limit. However, it lacks a general strategy to control the precursor chemistry for defects density reduction in the family of iodine based perovskite. Here the alkaline environment in precursor solution is carefully investigated as an effective parameter to suppress the incident iodine and affects the crystallization kinetics during film fabrication, via rationale adjustment of the alkalinity of additives. Especially, a ‘residual free’ weak alkaline is proposed not only to shrink the bandgap of the absorber by modulating the stoichiometry of organic cation, but also to improve the open circuit voltage in the resultant device. Consequently, the certified efficiency of 20.87% (Newport) is achieved with one of the smallest voltage deficits of 413 mV in the planar heterojunction perovskite solar cell.

URLView the original
Indexed BySCIE
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000460510000000
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Cited Times [WOS]:130   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorHuanping Zhou
Affiliation1.Key Laboratory for the Physics and Chemistry of Nanodevices, Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, P. R. C
2.School of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China.
3.Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong 999077, P. R. China
4.Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, P. R. China.
5.CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
6.Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Macau 999078, P. R. China.
7.Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, P. R. China. Correspondence and requests for materials should be addressed to H.Z.
Recommended Citation
GB/T 7714
Yihua Chen,Nengxu Li,Ligang Wang,et al. Impacts of alkaline on the defects property and crystallization kinetics in perovskite solar cells[J]. Nature Communications,2019,10(1).
APA Yihua Chen,Nengxu Li,Ligang Wang,Liang Li,Ziqi Xu,Haoyang Jiao,Pengfei Liu,Cheng Zhu,Huachao Zai,Mingzi Sun,Wei Zou,Shuai Zhang,Guichuan Xing,Xinfeng Liu,Jianpu Wang,Dongdong Li,Bolong Huang,Qi Chen,&Huanping Zhou.(2019).Impacts of alkaline on the defects property and crystallization kinetics in perovskite solar cells.Nature Communications,10(1).
MLA Yihua Chen,et al."Impacts of alkaline on the defects property and crystallization kinetics in perovskite solar cells".Nature Communications 10.1(2019).
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