Ultrathin Al2O3 interface achieving an 11.46% efficiency in planar n-Si/PEDOT:PSS hybrid solar cells

Title
Ultrathin Al2O3 interface achieving an 11.46% efficiency in planar n-Si/PEDOT:PSS hybrid solar cells
Author
이정호
Keywords
hybrid solar cell; Al2O3; built-in potential; PEDOT:PSS; silicon
Issue Date
2017-03
Publisher
IOP PUBLISHING LTD
Citation
NANOTECHNOLOGY, v. 28, No. 15, Article no. 155402
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.
URI
http://iopscience.iop.org/article/10.1088/1361-6528/aa63b9/metahttp://repository.hanyang.ac.kr/handle/20.500.11754/71834
ISSN
0957-4484; 1361-6528
DOI
10.1088/1361-6528/aa63b9
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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