Heteroleptic ruthenium antenna-dye for high-voltage dye-sensitized solar cells

Jheng Ying Li, Chia Yuan Chen, Jian Ging Chen, Chun Jui Tan, Kun Mu Lee, Shi Jhang Wu, Yung Liang Tung, Hui Hsu Tsai*, Kuo Chuan Ho, Chun Guey Wu

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

50 Scopus citations

Abstract

A new ruthenium photosensitizer, coded CYC-B7, incorporating a bithienyl-carbazole antenna ligand was designed and prepared for improving the open-circuit voltage (Voc) of a dye-sensitized solar cell (DSC) device. This new sensitizer displays the low energy MLCT transition band centered at 551 nm with a high molar absorption coefficient of 2.19 × 104 M-1 cm-1. In addition, a simple approach to reduce the aggregation of bulky ruthenium dyes assembled onto the surface of TiO2 film is demonstrated. The cell based on this new heteroleptic ruthenium dye provides a high Voc of 788 mV and an overall conversion efficiency (η) of 8.96%. The functionality of carbazole in CYC-B7 resulting in the increases of the Voc value of the corresponding device is verified by comparing with the performance of the DSC sensitized with a structurally similar dye without carbazole.

Original languageEnglish
Pages (from-to)7158-7164
Number of pages7
JournalJournal of Materials Chemistry
Volume20
Issue number34
DOIs
StatePublished - 14 09 2010
Externally publishedYes

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