Journal
NANOTECHNOLOGY
Volume 32, Issue 24, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1361-6528/abeb37
Keywords
perovskite solar cells; electron transport layer; low-temperature fabrication; co-doping
Funding
- National Nature Science Foundation of China [21401167]
- Key R & D and Promotion Project of Henan Province [192102210032, 202102210117]
- Open Project of State Key Laboratory of Silicon Materials [SKL2019-10]
- Outstanding Young Talent Research Fund of Zhengzhou University
Ask authors/readers for more resources
The development of a low-temperature chemical bath method for co-doping tantalum and niobium in the TiO2 ETL has shown improved conduction band level, reduced trap-state density, enhanced electron injection efficiency, and decreased charge recombination at the perovskite/ETL interface. This results in a superior power conversion efficiency of 19.44% in planar PSCs, providing new insights for low-cost and highly efficient PSCs fabrication.
A low-temperature preparation process is significantly important for scalable and flexible devices. However, the serious interface defects between the normally used titanium dioxide (TiO2) electron transport layer (ETL) obtained via a low-temperature method and perovskite suppress the further improvement of perovskite solar cells (PSCs). Here, we develop a facile low-temperature chemical bath method to prepare a TiO2 ETL with tantalum (Ta) and niobium (Nb) co-doping. Systematic investigations indicate that Ta/Nb co-doping could increase the conduction band level of TiO2 and could decrease the trap-state density, boosting electron injection efficiency and reducing the charge recombination between the perovskite/ETL interface. A superior power conversion efficiency of 19.44% can be achieved by a planar PSC with a Ta/Nb co-doped TiO2 ETL, which is much higher than that of pristine TiO2 (17.60%). Our achievements in this work provide new insights on low-temperature fabrication of low-cost and highly efficient PSCs.
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