Phenoxazine-based panchromatic organic sensitizers for dye-sensitized solar cells. (May 2015)

• Record Type: Journal Article
• Authors: Li, Jiajia; Yang, Xichuan; Cheng, Ming; Wang, Mei; Sun, Licheng
• Is Part Of: Dyes and pigments. Volume 116(2015)
• Page Start: 58
• Page End: 64
• Publication Date: 2015-05
• Subjects: DSSCs -- Metal-free organic photosensitizers -- Panchromatic response -- Phenoxazine -- Indolinum carboxyl acid derivative -- Squaraine; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2014.12.020
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: A series of metal-free organic dyesLJJ101 –LJJ103 composed of phenoxazine unit and indolinum carboxyl acid derivative have been synthesized for dye-sensitized solar cells. A systematic investigation has been conducted for the photology and electrochemistry properties of dyesLJJ101 –LJJ103 . Panchromatic spectra responses for all the three dyes have been obtained and extended to about 800 nm in near-infrared region. Compared toLJJ101, the introduction of thiophene and squaraine unit causes a red-shift absorption response forLJJ102 andLJJ103, respectively. When applied in dye-sensitized solar cells under AM 1.5 illumination, the device sensitized byLJJ103 yields the best conversion efficiency of 5.1% with a short-circuit photocurrent density of 13.7 mA/cm 2, an open-circuit photovoltage of 502 mV and a fill factor of 74.0%. Graphical abstract: Highlights: Three new dyes based on phenoxazine unit and indolinum carboxyl acid derivative were synthesized. All dyes exhibited panchromatic response both in CH2 Cl2 solution and on TiO2 film. A best overall conversion efficiency of 5.1% was obtained for DSSCs withLJJ103.