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Effect of regioisomeric substitution patterns on the performance of quinoxaline-based dye-sensitized solar cells

Title
Effect of regioisomeric substitution patterns on the performance of quinoxaline-based dye-sensitized solar cells
Author
정재윤
Keywords
Dye-sensitized solar cells; Metal-free organic dyes; Push-pull structure; Regioisomeric quinoxaline; Intramolecular charge transfer
Issue Date
2019-03
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ELECTROCHIMICA ACTA, v. 298, Page. 650-662
Abstract
Regioisomeric quinoxaline-based dyes (NQXs) were synthesized to study the effect of substitution patterns on the performance of quinoxaline-based dye sensitized solar cells (DSSCs). The H-1 NMR results indicated that the substitution patterns of ethylene groups on the quinoxaline unit greatly affect the molecular architecture through C-H center dot center dot center dot N hydrogen bonding, which also influenced the absorption and efficiency of the DSSCs. The highest occupied molecular orbital (HOMO) levels of the NQXs were estimated to range from 0.94 to 0.99 V by cyclic voltammetry and visible absorption studies, which is suitable for DSSCs. The photocurrent density-voltage curves and incident photon-to-electron conversion efficiency spectra of NQXs indicated that the introduction of phenothiazine groups at the 2-and 3-positions of quinoxaline is the most effective pattern for quinoxaline-based organic sensitizers in DSSCs. (C) 2018 Elsevier Ltd. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0013468618328524?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/108254
ISSN
0013-4686; 1873-3859
DOI
10.1016/j.electacta.2018.12.133
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
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