Benzothiadiazole-based organic dyes with pyridine anchors for dye-sensitized solar cells: Effect of donor on optical properties

M. N.K. Prasad Bolisetty, Chun Ting Li, K. R. Thomas Justin*, Govardhana Babu Bodedla, Kuo Chuan Ho

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

35 引文 斯高帕斯(Scopus)

摘要

Abstract New dyes containing pyridine anchoring group and different nitrogen-based heterocyclic electron-donating units linked via benzothiadiazole moiety have been synthesized and characterized by photophysical studies. Incorporation of benzothiadiazole extended the absorption onset into the lower energy region up to 600 nm. The dyes possessing vinyl linker between the heterocyclic donor and benzothiadiazole exhibited red-shifted absorption with high molar extinction coefficient than the dyes, which contain heterocyclic donor directly attached to the benzothiadiazole unit. The dyes exhibited acidochromism in the absorption spectra presumably due to the protonation of the pyridine nitrogen. These materials exhibited good thermal stability and their thermal-decomposition temperatures are in the range, 355-407 C. The dye-sensitized solar cells fabricated using a dye containing phenothiazine donor showed power conversion efficiency of 1.97%. Electrochemical impedance studies reveal that the charge separation is highly dependent on the structural composition of the dyes.

原文英語
文章編號26692
頁(從 - 到)4203-4212
頁數10
期刊Tetrahedron
71
發行號24
DOIs
出版狀態已發佈 - 2015 5月 26
對外發佈

ASJC Scopus subject areas

  • 生物化學
  • 藥物發現
  • 有機化學

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