Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

New bithiazole-functionalized organic photosensitizers for dye-sensitized solar cells

Language

English

Abstract

Five bithiazole-based organic dyes D1-D5 containing different electron donor moieties (thiophene, uorene, carbazole, and triarylamine) in the molecular frameworks were synthesized, characterized and applied in dye-sensitized solar cells (DSSCs). The effects of electron-donating moieties of the organic dyes on their photophysical, electrochemical, and photovoltaic properties have been investigated in detail. These dyes exhibit strong charge transfer absorption bands in the visible region. Their redox potential levels were estimated by cyclic voltammetry and found to match well with the charge flow in DSSCs. The combination of broad absorption bands with fairly high extinction coefficients and appropriate redox properties makes these bithiazole-based molecules promising dyes for DSSCs. For solar cell device based on D4, the maximal monochromatic incident photon-to-current conversion efficiency (IPCE) can reach up to 68.5%, with a short-circuit photocurrent density (Jsc) of 9.61 mA cm-2, an open-circuit photovoltage (Voc) of 0.70 V and a fill factor (FF) of 0.70, which results in a power conversion efficiency (PCE) of 4.65% under illumination of an AM 1.5 solar cell simulator. © 2012 Elsevier Ltd. All rights reserved.

Keywords

Bithiazole, Carbazole, Dye-sensitized solar cell, Organic dye, Photosensitizer, Synthesis

Publication Date

2013

Source Publication Title

Dyes and Pigments

Volume

96

Issue

2

Start Page

516

End Page

524

Publisher

Elsevier

DOI

10.1016/j.dyepig.2012.10.002

ISSN (print)

01437208

ISSN (electronic)

18733743

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