期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 2, 期 5, 页码 1331-1337出版社
AMER CHEMICAL SOC
DOI: 10.1021/sc5001447
关键词
Cesium stearate; Interfacial modification; Organic solar cells; Exciton dissociation
资金
- National Natural Science Foundation of China [51202264, 51273208, 51272152]
- Specialized Research Fund for the Spring Buds Talent Program [Y20804RA02]
- Hundred Talent Program of Chinese Academy of Science
- Guangdong Natural Science Foundation [S2013010014171]
We used cesium stearate (CsSt) to modify the interface of the electron-extracting contact in inverted organic solar cells. Surface microstructure, optical properties, and electrical characterization as well as exciton generation rate and dissociation probability were investigated to understand the impact of CsSt on the interface contact. The results indicated that by incorporation of CsSt, the surface morphology and energy level as well as conductivity of a zinc oxide (ZnO) film were improved. On the basis of the above properties, highly efficient inverted organic solar cells have been demonstrated by using a ZnO nanoparticle film and CsSt stacked bilayer structure as the cathode interfacial layer. The insertion of a CsSt layer between the ZnO film and active layer improved the electron extraction efficiency, and a high power conversion efficiency (PCE) of 8.69% was achieved. The PCE was improved by 20% as compared to the reference device using a ZnO-only electron extraction layer.
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