Ultrathin Al2O3 interface achieving an 11.46% efficiency in planar n-Si/PEDOT:PSS hybrid solar cells
- Authors
- Nam, Yoon-Ho; Song, Jae-Won; Park, Min-Joon; Sami, Abdul; Lee, Jung-Ho
- Issue Date
- Apr-2017
- Publisher
- Institute of Physics Publishing
- Keywords
- hybrid solar cell; Al2O3; built-in potential; PEDOT:PSS; silicon
- Citation
- Nanotechnology, v.28, no.15, pp.1 - 6
- Indexed
- SCIE
SCOPUS
- Journal Title
- Nanotechnology
- Volume
- 28
- Number
- 15
- Start Page
- 1
- End Page
- 6
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/9981
- DOI
- 10.1088/1361-6528/aa63b9
- ISSN
- 0957-4484
- Abstract
- Hybrid organic-inorganic photovoltaic devices consisting of poly(3,4-etyhlenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) and n-type silicon have recently been investigated for their cost-efficiency and ease of fabrication. We demonstrate that the insertion of an ultrathin Al2O3 layer between n-Si and PEDOT: PSS significantly improves photovoltaic performance in comparison to the conventional interfacial oxide employing SiO2. A power-conversion efficiency of 11.46% was recorded at the optimal Al2O3 thickness of 2.3 nm. This result was achieved based upon increased built-in potential and improved charge collection via the electron blocking effect of Al2O3. In addition, the hydrophilicity enhanced by Al2O3 improved the coating uniformity of the PEDOT: PSS layer, resulting in a further reduction in surface recombination.
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