期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 7, 页码 4608-4615出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b11067
关键词
perovskite solar cell; formamidinium; metal oxide; composite material; carrier transport
资金
- Japan Science and Technology Agency (JST) Advanced Low Carbon Technology R&D program (ALCA)
- JSPS [26289265]
- Grants-in-Aid for Scientific Research [26289265] Funding Source: KAKEN
Heterogeneous TiO2 and Al2O3 composites were employed as a mesoporous scaffold in formamidinium lead trihalide (FAPhI(3-x)Cl(x))-based perovskite solar cells to modify surface properties of a mesoporous layer. It was found 15 that the quality and morphology of the perovskite film were strongly affected by the TiO2/Al2O3 ratio in the mesoporous film. The conversion efficiency of the perovskite solar cell was improved by using a composite of TiO2 and Al2O3 in comparison with TiO2- and Al2O3-based cells, yielding 11.0% for a cell with a 7:3 TiO2/Al2O3 composite. Our investigation shows a change of electron transport path depending on a composition ratio of insulating Al2O3 to n-type semiconducting TiO2 in a mesoporous layer.
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