Integration of High-Performance Nanocrystalline TiO2 Photoelectrodes for N719-Sensitized Solar Cells. (15th May 2013)

• Record Type: Journal Article
• Authors: Jiang, Ke-Jian; Zhou, Jin-Ming; Manseki, Kazuhiro; Liu, Qi-Sheng; Huang, Jin-Hua; Song, Yan-lin; Yanagida, Shozo
• Other Names: Dimopoulos Theodoros Academic Editor.
• Is Part Of: International journal of photoenergy. Volume 2013(2013)
• Publication Date: 2013-05-15
• Subjects: Photochemistry -- Periodicals; Photobiology -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Photochimie; Photobiologie; Chimie physique et théorique; Chemistry, Physical and theoretical; Photobiology; Photochemistry; Electronic journals; Periodicals; 541.35
• DOI: 10.1155/2013/807931
• Languages: English
• ISSNs: 1110-662X

Abstract

Abstract : We report on enhanced performance of N719-sensitized TiO2 solar cells (DSCs) incorporating size and photoelectron diffusion-controlled TiO2 as sensitizer-matched light-scatter layers on conventional nanocrystalline TiO2 electrodes. The double-layered N719/TiO2 composite electrode with a high dye-loading capacity exhibits the diffused reflectance of more than 50% in the range of λ = 650–800 nm, even when the films are coupled with the titania nanocrystalline underlayer in the device. As a result, the increased near-infrared light-harvesting produces a high light-to-electricity conversion efficiency of over 9% mainly due to the significant increase of J s c . Such an optical effect of the NIR-light scattering TiO2 electrodes will be beneficial when the sensitizers with low molar extinction coefficients, such as N719, are introduced in the device.