11.3% efficient planar Si-PEDOT: PSS hybrid solar cell with a thin interfacial oxide

Hybrid solar cells are fabricated based on heterojunction between planar n-type Si and a p-type polymer, poly (3,4-ethylene-dioxythiophene): polystyrenesulfonate (PEDOT: PSS). The effect of hydrogen-terminated (H-Si) and oxide-terminated (SiO x -Si) Si surface on the cell performance are investigate...

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Bibliographic Details
Main Authors: Lining He, Changyun Jiang, Hao Wang, Hong Lei, Lai, D., Rusli
Format: Conference Proceeding
Language:English
Subjects:
band alignment
Heterojunctions
hybrid solar cell
Nanowires
organic material
Photovoltaic cells
Polymers
Silicon
surface termination
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Summary:Hybrid solar cells are fabricated based on heterojunction between planar n-type Si and a p-type polymer, poly (3,4-ethylene-dioxythiophene): polystyrenesulfonate (PEDOT: PSS). The effect of hydrogen-terminated (H-Si) and oxide-terminated (SiO x -Si) Si surface on the cell performance are investigated. Compared to cells with H-Si surface that exhibits a power conversion efficiency (PCE) of 0.04%, the PCE of the cells with SiO x -Si surface is boosted significantly to 11.3%. It is also found that the SiO x -Si cell exhibits a much better diode rectifying behavior and the SiO x -Si surface bonding results in a favorable band alignment in the Si/PEDOT interface for photo-excited carrier separation.
ISSN:0160-8371
DOI:10.1109/PVSC.2012.6318170