Journal
SCIENCE BULLETIN
Volume 66, Issue 4, Pages 347-353Publisher
ELSEVIER
DOI: 10.1016/j.scib.2020.09.017
Keywords
Perovskite solar cells; Energy loss; Indoor light; Carrier dynamics; Grain size
Categories
Funding
- National Key R&D Program of China [2016YFA0202400]
- National Natural Science Foundation of China [61674109]
- Natural Science Foundation of Jiangsu Province [BK20170059]
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- 111Project of The State Administration of Foreign Experts Affairs of China
- Open Fund of the State Key Laboratory of Integrated Optoelectronics [IOSKL2018KF07]
Ask authors/readers for more resources
The study utilized (NH4)(2)C2O4 center dot H2O treatment to improve the efficiency of CsPbBrI2 perovskite solar cells and reduce energy loss. The optimized device showed better performance under indoor lighting compared to the reference device.
Over the years, the efficiency of inorganic perovskite solar cells (PSCs) has increased at an unprecedented pace. However, energy loss in the device has limited a further increase in efficiency and commercialization. In this work, we used (NH4)(2)C2O4 center dot H2O to treat CsPbBrI2 perovskite film during spin-coating. The CsPbBrI2 underwent secondary crystallization to form high quality films with micrometer-scale and low trap density. (NH4)(2)C2O4 center dot H2O treatment promoted charge transfer capacity and reduced the ideal factor. It also dropped the energy loss from 0.80 to 0.64 eV. The resulting device delivered a power conversion efficiency (PCE) of 16.55% with an open-circuit voltage (V-oc) of 1.24 V, which are largely improved compared with the reference device which exhibited a PCE of 13.27% and a V-oc of 1.10 V. In addition, the optimized treated device presented a record indoor PCE of 28.48% under a fluorescent lamp of 1000 lux, better than that of the reference device (19.05%). (C) 2020 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available