標題: Structural planarity and conjugation effects of novel symmetrical acceptor-donor-acceptor organic sensitizers on dye-sensitized solar cells
作者: Chu, Hsuan-Chih
Sahu, Duryodhan
Hsu, Ying-Chan
Padhy, Harihara
Patra, Dhananjaya
Lin, Jiann-T'Suen
Bhattacharya, Dibyendu
Lu, Kuang-Lieh
Wei, Kung-Hwa
Lin, Hong-Cheu
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: Carbazole;Solar cell;Sensitizer;Donor-acceptor;Density functional theory;Charge transfer
公開日期: 1-四月-2012
摘要: In this study two series of novel symmetrical acceptor-donor-acceptor organic sensitizers containing 3,6- and 2,7-functionalized carbazole cores, respectively, connected to two anchoring cyanoacrylic acid termini via thienyl linkers were synthesized. The effect of the molecular planarity originating from the 3,6- and 2,7-functionalized carbazole cores on the performance of corresponding solar cells were investigated. Molecular orbital analyses revealed the characteristics of the carbazole-based highest occupied molecular orbitals and acid-based lowest unoccupied molecular orbitals. Time-dependent density functional theory calculations allowed us to assign the electronic transitions (>90%) of the low energy bands. Among these new dyes, the highest power conversion efficiency of 4.82% was obtained in a dye-sensitized solar cell device under standard AM 1.5 sunlight with an open-circuit voltage of 0.61 V, a short-circuit photocurrent density of 12.66 mA cm(-2) and a fill factor of 0.62. (C) 2011 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.dyepig.2011.09.012
http://hdl.handle.net/11536/15544
ISSN: 0143-7208
DOI: 10.1016/j.dyepig.2011.09.012
期刊: DYES AND PIGMENTS
Volume: 93
Issue: 1-3
起始頁: 1488
結束頁: 1497
顯示於類別:期刊論文


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  1. 000300539800013.pdf