https://scholars.lib.ntu.edu.tw/handle/123456789/347902
Title: | Dye-sensitized solar cells with a micro-porous TiO2 electrode and gel polymer electrolytes prepared by in situ cross-link reaction | Authors: | Lee, K.-M. Hsu, C.-Y. Chiu, W.-H. Tsui, M.-C. Tung, Y.-L. Tsai, S.-Y. Ho, K.-C. KUO-CHUAN HO |
Keywords: | Co-adsorbent; Dye-sensitized solar cells; In situ cross-link reaction; Micro-porous TiO2 electrode | Issue Date: | 2009 | Journal Volume: | 93 | Journal Issue: | 11 | Start page/Pages: | 2003-2007 | Source: | Solar Energy Materials and Solar Cells | Abstract: | 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 JSC significantly increased from 7.72 to 10.00 mA 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 after sintering at 500 °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%. © 2009 Elsevier B.V. All rights reserved. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-69949160780&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/347902 |
DOI: | 10.1016/j.solmat.2009.07.017 | SDG/Keyword: | Butyl methacrylates; Cell conversion efficiency; Charge transport; Co-adsorbent; Cross-link reactions; Cross-linkers; Crosslinker; Dye aggregation; Dye-Sensitized solar cell; Dye-sensitized solar cells; Gel polymer electrolytes; In situ cross-link reaction; In-situ; Ion transports; Ionic diffusion; Linear structures; Micro-porous TiO2 electrode; Mono-dispersed; Optimal weight; Porous TiO; Tetrakis; TiO; Adsorption; Benzene; Cell membranes; Conducting polymers; Conversion efficiency; Diffusion in solids; Gelation; Gels; Ionic conductivity; Ions; Phase interfaces; Phase separation; Photoelectrochemical cells; Photovoltaic cells; Polyelectrolytes; Sintering; Solar cells |
Appears in Collections: | 化學工程學系 |
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