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Organic Photosensitizers Incorporating Rigidified Dithieno[3,2-f:2',3'-h]quinoxaline Segment Tethered With Thiophene Substitutes for Dye-Sensitized Solar Cells

Organic Photosensitizers Incorporating Rigidified Dithieno[3,2-f:2',3'-h]quinoxaline Segment Tethered With Thiophene Substitutes for Dye-Sensitized Solar Cells

Jen-Shyang Ni, Tang-Yao Chiu, Wei-Siang Kao, Hao-Ju Chou, Chao-Chin Su, Jiann T Lin

ACS Appl Mater Interfaces. 2016 Sep 7;8(35):23066-73.

PMID: 27523392

Abstract:

Metal-free D-π-RS-π-A type sensitizers, consisting of triphenylamine as the electron donor, 2,3-bis(3-(2-ethylhexyl)-5-methylthiophen-2-yl)dithieno[3,2-f:2',3'-h]quinoxaline (DTQT) as the rigidified conjugation spacer (RS), thiophene as the π-spacer, and 2-cyanoacrylic acid as the acceptor/anchor, have broad absorption spectra ranging from 350 to 550 nm and a high molar extinction coefficient up to >46 200 M(-1) cm(-1). Under simulated AM 1.5 G illumination, the dye-sensitized solar cells (DSSCs) fabricated from the dyes exhibited light-to-electricity conversions in the range of 6.78% to 8.27%. The best efficiency is slightly higher than that of N719-based standard DSSC (7.92%). The efficiency can be further boosted to 8.51% by optimizing the concentration of LiI electrolyte.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP121134381	3-(2-Ethylhexyl)thiophene		121134-38-1	Price

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