The roles of thin dense metal oxide films in inverted hybrid solar cells
The wideband semiconducting metal oxide TiO 2 and Nb 2O 5 thin films have been deposited onto FTO substrates by sol-gel method for the fabrication of inverted hybrid photovoltaics. A thin metal oxide film of approximately 10...
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th-cmuir.6653943832-67092014-08-30T03:51:08Z The roles of thin dense metal oxide films in inverted hybrid solar cells Wiranwetchayan O. Liang Z. Zhang Q. Cao G.Z. Singjai P. The wideband semiconducting metal oxide TiO 2 and Nb 2O 5 thin films have been deposited onto FTO substrates by sol-gel method for the fabrication of inverted hybrid photovoltaics. A thin metal oxide film of approximately 10 nm in thickness between the electron collecting electrode and the photoactive blend of poly(3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM) has been demonstrated to be necessary to promote the formation of continuous uniform PCBM film to block holes from being recombined with good power conversion efficiency of 2.8% and much enhanced stability. In spite the fact that the conduction band of Nb 2O 5 is higher than the LUMO of PCBM, a power conversion of 2.7% was achieved, a very small difference in comparison with TiO 2 hybrid solar cells (2.8%). Increased thickness of dense metal oxide film leads to decreased fill factor, current density, and thus the power conversion efficiency. The above experimental results suggest that electrons from LOMO energy level of P3HT and PCBM can tunnel through dense metal oxide film to charge collecting FTO substrate. © 2011 IEEE. 2014-08-30T03:51:08Z 2014-08-30T03:51:08Z 2011 Conference Paper 9781457721397 10.1109/NMDC.2011.6155398 89480 http://www.scopus.com/inward/record.url?eid=2-s2.0-84860467726&partnerID=40&md5=fcde14c7140708ef6ba8b145d4d412b0 http://cmuir.cmu.ac.th/handle/6653943832/6709 English |
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The wideband semiconducting metal oxide TiO
2 and Nb
2O
5 thin films have been deposited onto FTO substrates by sol-gel method for the fabrication of inverted hybrid photovoltaics. A thin metal oxide film of approximately 10 nm in thickness between the electron collecting electrode and the photoactive blend of poly(3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM) has been demonstrated to be necessary to promote the formation of continuous uniform PCBM film to block holes from being recombined with good power conversion efficiency of 2.8% and much enhanced stability. In spite the fact that the conduction band of Nb
2O
5 is higher than the LUMO of PCBM, a power conversion of 2.7% was achieved, a very small difference in comparison with TiO
2 hybrid solar cells (2.8%). Increased thickness of dense metal oxide film leads to decreased fill factor, current density, and thus the power conversion efficiency. The above experimental results suggest that electrons from LOMO energy level of P3HT and PCBM can tunnel through dense metal oxide film to charge collecting FTO substrate. © 2011 IEEE. |
format |
Conference or Workshop Item |
author |
Wiranwetchayan O. Liang Z. Zhang Q. Cao G.Z. Singjai P. |
spellingShingle |
Wiranwetchayan O. Liang Z. Zhang Q. Cao G.Z. Singjai P. The roles of thin dense metal oxide films in inverted hybrid solar cells |
author_facet |
Wiranwetchayan O. Liang Z. Zhang Q. Cao G.Z. Singjai P. |
author_sort |
Wiranwetchayan O. |
title |
The roles of thin dense metal oxide films in inverted hybrid solar cells |
title_short |
The roles of thin dense metal oxide films in inverted hybrid solar cells |
title_full |
The roles of thin dense metal oxide films in inverted hybrid solar cells |
title_fullStr |
The roles of thin dense metal oxide films in inverted hybrid solar cells |
title_full_unstemmed |
The roles of thin dense metal oxide films in inverted hybrid solar cells |
title_sort |
roles of thin dense metal oxide films in inverted hybrid solar cells |
publishDate |
2014 |
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http://www.scopus.com/inward/record.url?eid=2-s2.0-84860467726&partnerID=40&md5=fcde14c7140708ef6ba8b145d4d412b0 http://cmuir.cmu.ac.th/handle/6653943832/6709 |
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