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- Title
Efficient Indium-Doped TiO <sub>x</sub> Electron Transport Layers for High-Performance Perovskite Solar Cells and Perovskite-Silicon Tandems.
- Authors
Peng, Jun; Duong, The; Zhou, Xianzhong; Shen, Heping; Wu, Yiliang; Mulmudi, Hemant Kumar; Wan, Yimao; Zhong, Dingyong; Li, Juntao; Tsuzuki, Takuya; Weber, Klaus J.; Catchpole, Kylie R.; White, Thomas P.
- Abstract
In addition to a good perovskite light absorbing layer, the hole and electron transport layers play a crucial role in achieving high-efficiency perovskite solar cells. Here, a simple, one-step, solution-based method is introduced for fabricating high quality indium-doped titanium oxide electron transport layers. It is shown that indium-doping improves both the conductivity of the transport layer and the band alignment at the ETL/perovskite interface compared to pure TiO2, boosting the fill-factor and voltage of perovskite cells. Using the optimized transport layers, a high steady-state efficiency of 17.9% for CH3NH3PbI3-based cells and 19.3% for Cs0.05(MA0.17FA0.83)0.95Pb(I0.83Br0.17)3-based cells is demonstrated, corresponding to absolute efficiency gains of 4.4% and 1.2% respectively compared to TiO2-based control cells. In addition, a steady-state efficiency of 16.6% for a semi-transparent cell is reported and it is used to achieve a four-terminal perovskite-silicon tandem cell with a steady-state efficiency of 24.5%.
- Subjects
SOLAR cell efficiency; TITANIUM dioxide; PEROVSKITE; ELECTRON transport; INDIUM; SILICON; ELECTRIC conductivity
- Publication
Advanced Energy Materials, 2017, Vol 7, Issue 4, pn/a
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.201601768