Thick TiO2-Based Top Electron Transport Layer on Perovskite for Highly Efficient and Stable Solar Cells
| Autor: | Kok Wai Cheah, Xingang Ren, Fei Ye, Zhanfeng Huang, Dan Ouyang, Yong Zhao, Wallace C. H. Choy, Hugh L. Zhu, Alex K.-Y. Jen, Hong Zhang |
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| Rok vydání: | 2018 |
| Předmět: |
Reproducibility
Electron transport layer Fabrication Fullerene Materials science Renewable Energy Sustainability and the Environment business.industry Diffusion Energy Engineering and Power Technology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Ion Fuel Technology Chemistry (miscellaneous) Materials Chemistry Optoelectronics 0210 nano-technology business Solution process Perovskite (structure) |
| Zdroj: | ACS Energy Letters. 3:2891-2898 |
| ISSN: | 2380-8195 |
| DOI: | 10.1021/acsenergylett.8b01507 |
| Popis: | Simultaneously achieving high efficiency, long-term stability, and robust fabrication with good reproducibility in perovskite solar cells (PVSCs) is essential for their practical applications. Herein, we first demonstrate a thick TiO2 backbone film directly on top of a perovskite film through a simple room-temperature solution process. Through the strategy of decorating the TiO2 film with fullerene for passivating traps and filling voids, we achieve a fullerene-decorated TiO2 electron transport layer (ETL) in inverted PVSCs. Because of the suppressed monomolecular Shockley–Read–Hall recombination and ion diffusion of the fullerene-decorated TiO2 ETL, stabilized efficiencies of ∼20% and shelf life stability remaining over 98% of initial efficiency after aging in ambient conditions or 16 months are achieved. Remarkably, the PVSCs are insensitive to TiO2 thickness from 50 to 250 nm, which contributes significantly to the robust fabrication and high reproducibility of the PVSCs. This work provides an ETL desi... |
| Databáze: | OpenAIRE |
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