期刊
ENERGIES
卷 11, 期 6, 页码 -出版社
MDPI
DOI: 10.3390/en11061397
关键词
SiOx interface; n-Si; PEDOT:PSS solar cells; surface polarity
资金
- Natural Science Foundation of China [61604119]
- Fundamental Research Funds for the Central Universities [JBX171103, JB161101, JB161102]
- China Postdoctoral Science Foundation [2016M602771]
- Funds for University from Department of Education of Guangxi [KY2015YB109]
- Funds for the Key Laboratory of Automatic Measurement Technology and Instruments [YQ16103]
In this work, the effects of the SiOx interface layer grown by exposure in air on the performance of planar hybrid n-Si/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) solar cells are investigated. Compared to the cell with a hydrogen-terminated Si surface, the cell with an oxygen-terminated Si surface reveals improved characteristics in power conversion efficiency, increased from 10.44% to 13.31%. By introducing the SiOx, the wettability of the Si surface can be improved, allowing an effective spread of the PEDOT:PSS solution and thus a good contact between the PEDOT:PSS film and Si. More importantly, it can change the polarity of the Si surface from a negative dipole to a positive dipole, owing to the introduction of the SiOx interface. The Si energy band will bend up and give rise to a favorable band alignment between Si and PEDOT:PSS to promote carrier separation. These results could be potentially employed to further development of this simple, low-cost heterojunction solar cell.
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