標題: Dye-sensitized solar cells with a micro-porous TiO2 electrode and gel polymer electrolytes prepared by in situ cross-link reaction
作者: Lee, Kun-Mu
Hsu, Chih-Yu
Chiu, Wei-Hao
Tsui, Meng-Chin
Tung, Yung-Liang
Tsai, Song-Yeu
Ho, Kuo-Chuan
光電工程學系
光電工程研究所
Department of Photonics
Institute of EO Enginerring
關鍵字: Co-adsorbent;In situ cross-link reaction;Dye-sensitized solar cells;Micro-porous TiO2 electrode
公開日期: 1-Nov-2009
摘要: The ionic conductivities and performances of dye-sensitized solar cells(DSSCs) of gel polymer electrolytes(GPEs) prepared by in situ cross-link reaction with different cross-linkers were investigated. The poly(imidazole-co-butylmethacrylate)-based GPE containing the 1,2,4,5-tetrakis(bromomethyl)benzene (B4Br) cross-linker showed a higher ionic conductivity than that containing cross-linkers with a linear structure, due to the formation of micro-phase separation that resulted in an increase in ion transport paths in the GPE. Moreover, the co-adsorbent((4-pyridylthio) acetic acid, PAA) co-adsorbed with N3 dye on the TiO2 electrode not only reduced dye aggregation, but also reacted with the cross linkers in the GPE at the TiO2/GPE interface. A decrease in the charge transport resistance at the TiO2/GPE interface was noted after forming the gel; thus the value of J(SC) significantly increased from 7.72 to 10.00 m A cm(-2). In addition, in order to reduce the ionic diffusion resistance within the TiO2 electrode, incorporation of monodispersed PMMA in the TiO2 paste was considered. With the optimal weight ratio of PMMA/TiO2 (w/w 3.75), the TiO2 electrode exhibited larger pores (ca. 350 nm) uniformly distributed afters intering at 500 degrees C, and the ionic diffusion resistance within the TiO2 film could significantly be reduced. The cell conversion efficiency increased from 3.61% to 5.81% under illumination of 100 mW cm (-2), an improvement of ca. 55%. (C) 2009 Elsevier B. V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.solmat.2009.07.017
http://hdl.handle.net/11536/149877
ISSN: 0927-0248
DOI: 10.1016/j.solmat.2009.07.017
期刊: SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume: 93
起始頁: 2003
結束頁: 2007
Appears in Collections:Articles