期刊
NANO LETTERS
卷 14, 期 4, 页码 2168-2174出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl500544c
关键词
Perovskites; hybrid solar cells; Stark spectroscopy; DFT investigations
类别
资金
- CNR-EFOR
- MAAT-PON
- BEYOND-NANO-PON
- CNR-PHOEBUS
- FP7-ENERGY project [261920]
To unveil the mechanisms controlling photovoltaic conversion in high-performing perovskite-based meso-structured solar cells, we focus on the key role played by the mesoporous oxide/perovskite interface. We employ several spectroscopic techniques to design a complete scenario and corroborate our results with first principle density functional theory calculations. In particular Stark spectroscopy, a powerful tool allowing interface-sensitive analysis is employed to prove the existence of oriented permanent dipoles, consistent with the hypothesis of an ordered perovskite layer, close to the oxide surface. The existence of a structural order, promoted by specific local interactions, could be one of the decisive reasons for highly efficient carriers transport within perovskite films.
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