Impacts of alkaline on the defects property and crystallization kinetics in perovskite solar cells

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 and Huanping Zhou ()
Additional contact information
Yihua Chen: College of Engineering, Peking University
Nengxu Li: College of Engineering, Peking University
Ligang Wang: College of Engineering, Peking University
Liang Li: College of Engineering, Peking University
Ziqi Xu: College of Engineering, Peking University
Haoyang Jiao: College of Engineering, Peking University
Pengfei Liu: Beijing Institute of Technology
Cheng Zhu: Beijing Institute of Technology
Huachao Zai: Beijing Institute of Technology
Mingzi Sun: Hong Kong Polytechnic University
Wei Zou: Nanjing Tech University
Shuai Zhang: National Center for Nanoscience and Technology
Guichuan Xing: University of Macau
Xinfeng Liu: National Center for Nanoscience and Technology
Jianpu Wang: Nanjing Tech University
Dongdong Li: Chinese Academy of Sciences
Bolong Huang: Hong Kong Polytechnic University
Qi Chen: Beijing Institute of Technology
Huanping Zhou: College of Engineering, Peking University

Nature Communications, 2019, vol. 10, issue 1, 1-10

Abstract: Abstract 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.

Date: 2019
References: Add references at CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.nature.com/articles/s41467-019-09093-1 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-09093-1

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-019-09093-1

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().