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- Title
Enhanced Charge Extraction of Li-Doped TiO<sub>2</sub> for Efficient Thermal-Evaporated Sb<sub>2</sub>S<sub>3</sub> Thin Film Solar Cells.
- Authors
Lan, Chunfeng; Luo, Jingting; Lan, Huabin; Fan, Bo; Peng, Huanxin; Zhao, Jun; Sun, Huibin; Zheng, Zhuanghao; Liang, Guangxing; Fan, Ping
- Abstract
We provided a new method to improve the efficiency of Sb2S3 thin film solar cells. The TiO2 electron transport layers were doped by lithium to improve their charge extraction properties for the thermal-evaporated Sb2S3 solar cells. The Mott-Schottky curves suggested a change of energy band and faster charge transport in the Li-doped TiO2 films. Compared with the undoped TiO2, Li-doped mesoporous TiO2 dramatically improved the photo-voltaic performance of the thermal-evaporated Sb2S3 thin film solar cells, with the average power conversion efficiency (PCE) increasing from 1.79% to 4.03%, as well as the improved open-voltage (Voc), short-circuit current (Jsc) and fill factors. The best device based on Li-doped TiO2 achieved a power conversion efficiency up to 4.42% as well as a Voc of 0.645 V, which are the highest values among the reported thermal-evaporated Sb2S3 solar cells. This study showed that Li-doping on TiO2 can effectively enhance the charge extraction properties of electron transport layers, offering a new strategy to improve the efficiency of Sb2S3-based solar cells.
- Subjects
TITANIUM dioxide; LITHIUM; DOPING agents (Chemistry); ANTIMONY sulfides; SOLAR cells; EXTRACTION (Chemistry); EVAPORATION (Chemistry); THIN films
- Publication
Materials (1996-1944), 2018, Vol 11, Issue 3, p355
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma11030355