Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 49, Pages 21997-22001Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202010252
Keywords
all-inorganic perovskites; interfacial strain regulation; 2D materials; solar cells; van der Waals heterostructures
Categories
Funding
- Postdoctoral Research Foundation of China [2019M650231, 2019M663379]
- National Natural Science Foundation of China [61774139, U1802257]
- Natural Science Foundation of Guangdong Province [2019B151502061, 2020A1515011123]
- Fundamental Research Funds for the Central Universities [21620348, 21618409, 21619311]
Ask authors/readers for more resources
Perovskite lattice distortion induced by residual tensile strain from the thermal expansion mismatch between the electron-transporting layer (ETL) and perovskite film causes a sluggish charge extraction and transfer dynamics in all-inorganic CsPbBr(3)perovskite solar cells (PSCs) because of their higher crystallization temperatures and thermal expansion coefficients. Herein, the interfacial strain is released by fabricating a WS2/CsPbBr(3)van der Waals heterostructure owing to their matched crystal lattice structure and the atomically smooth dangling bond-free surface to act as a lubricant between ETL and CsPbBr(3)perovskite. Arising from the strain-released interface and condensed perovskite lattice, the best device achieves an efficiency of 10.65 % with an ultrahigh open-circuit voltage of 1.70 V and significantly improved stability under persistent light irradiation and humidity (80 %) attack over 120 days.
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