Low-temperature processed tantalum/niobium co-doped TiO2 electron transport layer for high-performance planar perovskite solar cells
- 11 June 2021
- journal article
- research article
- Published by IOP Publishing in Nanotechnology
- Vol. 32 (24), 245201
- https://doi.org/10.1088/1361-6528/abeb37
Abstract
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.Funding Information
- Outstanding Young Talent Research Fund of Zhengzhou University
- National Nature Science Foundation of China (21401167)
- Key R & D and Promotion Project of Henan Province (192102210032)
- Open Project of State Key Laboratory of Silicon Materials (SKL2019-10)
This publication has 55 references indexed in Scilit:
- VOC Over 1.4 V for Amorphous Tin-Oxide-Based Dopant-Free CsPbI2Br Perovskite Solar CellsJournal of the American Chemical Society, 2020
- Efficient, stable silicon tandem cells enabled by anion-engineered wide-bandgap perovskitesScience, 2020
- Highly Efficient Thermally Co-evaporated Perovskite Solar Cells and Mini-modulesJoule, 2020
- A general approach for hysteresis-free, operationally stable metal halide perovskite field-effect transistorsScience Advances, 2020
- Perovskite-molecule composite thin films for efficient and stable light-emitting diodesNature Communications, 2020
- Tailored electronic properties of Zr-doped SnO2 nanoparticles for efficient planar perovskite solar cells with marginal hysteresisNano Energy, 2019
- Planar perovskite solar cells with long-term stability using ionic liquid additivesNature, 2019
- Self-trapped state enabled filterless narrowband photodetections in 2D layered perovskite single crystalsNature Communications, 2019
- A Eu 3+ -Eu 2+ ion redox shuttle imparts operational durability to Pb-I perovskite solar cellsScience, 2019
- A solvent- and vacuum-free route to large-area perovskite films for efficient solar modulesNature, 2017