Photophysical characteristics and photosensitizing abilities of thieno[3,2-b]thiophene-Based photosensitizers for photovoltaic and photocatalytic applications

Po Yu Ho, Yi Wang, Sze Chun Yiu, Yan Yi Kwok, Chi Ho Siu, Cheuk Lam HO*, Lawrence Tien Lin Lee, Tao Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Six donor−π−acceptor (D–π–A) organic dyes based on thieno[3,2-b]thiophene π-linker comprising different alkyl side chains were synthesized and characterized. Their photophysical and electrochemical properties were studied and their corresponding performances as photosensitizers (PSs) in dye-sensitized solar cells (DSSCs) and photocatalytic hydrogen production systems were also investigated. A power conversion efficiency (PCE) of 5.25 % in DSSCs and a decent H2 turnover number (TON) of 5170 (48 h) in platinized TiO2 hydrogen production system were demonstrated. The results indicated that alkyl chain engineering is one of the crucial steps in designing a superior photosensitizer.

Original languageEnglish
Article number112979
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume406
DOIs
Publication statusPublished - 1 Feb 2021

Scopus Subject Areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Physics and Astronomy(all)

User-Defined Keywords

  • Alkyl chain effects
  • Dye-sensitized solar cells
  • Photocatalytic hydrogen production
  • Photosensitizers
  • Thieno[3,2-b]thiophene

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