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

Research output: Contribution to journalArticlepeer-review

47 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 Sep 2010

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