Panchromatic co-sensitization of porphyrin-sensitized solar cells to harvest near-infrared light beyond 900 nm. Issue 4 (10th December 2014)

• Record Type: Journal Article
• Authors: Shiu, Jia-Wei; Chang, Yen-Cheng; Chan, Chien-Yi; Wu, Hui-Ping; Hsu, Hung-Yu; Wang, Chin-Li; Lin, Ching-Yao; Diau, Eric Wei-Guang
• Is Part Of: Journal of materials chemistry. Volume 3:Issue 4(2015)
• Page Start: 1417
• Page End: 1420
• Publication Date: 2014-12-10
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c4ta06589a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : We designed a dimeric porphyrin dye based on an efficient push–pull zinc porphyrin with extended π-conjugation so that the light-harvesting ability exhibits a panchromatic feature covering a broad spectral region from 400 nm to 900 nm. Abstract : We designed a dimeric porphyrin dye (LDD1) based on an efficient push–pull zinc porphyrin (LD14) with extended π-conjugation through coupling of two zinc porphine cores via an acetylene bridge at the meso position of the porphyrin to extend the absorption spectrum effectively into the near infrared region. The effect of dye aggregation among porphyrin molecules was significantly suppressed when the LDD1 and LD14 dyes were co-sensitized on a nanocrystalline TiO2 film in a dye-sensitized photovoltaic system. The light-harvesting ability of the device exhibits a panchromatic feature covering a broad spectral region from 400 nm to 900 nm, which results in a short-circuit current density of 21.3 mA cm −2 and a power conversion efficiency of 10.4% in an iodine-based solar cell.