New ruthenium sensitizer with carbazole antennas for efficient and stable Thin-film Dye-sensitized solar cells

Chia Yuan Chen, Nuttapol Pootrakulchote, Shi Jhang Wu, Mingkui Wang, Jheng Ying Li, Jia Hung Tsai, Chun Guey Wu, Shaik M. Zakeeruddin, Michael Grätzel

Research output: Contribution to journalArticlepeer-review

61 Scopus citations

Abstract

A new heteroleptic ruthenium complex, coded CYC-B13, incorporating an antenna ligand composed of the sequential connection of a conjugated segment and carbazole hole-transport moiety was prepared. This new sensitizer exhibits the lower energy MLCT band centered at 547 nm with a high molar absorption coefficient of 1.93 ×104 M-1 cm-1. Thin-film cells based on this new sensitizer show good conversion efficiency (>8%) and excellent durability under light soaking at 60 °C in simulated sunlight for 1000 h. An all-solid state device based on CYC-B13 is also demonstrated to have a conversion efficiency of 3.8%. The photovoltaic data of DSCs sensitized with CYC-B13 suggested that carbazole is a photostable hole-transporting moiety to be used in dye-sensitized solar cells.

Original languageEnglish
Pages (from-to)20752-20757
Number of pages6
JournalJournal of Physical Chemistry C
Volume113
Issue number48
DOIs
StatePublished - 2009

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