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|標題:||Electrochemical polymerization effects of triphenylamine-based dye on TiO2 photoelectrodes in dye-sensitized solar cells||作者:||Yang, C.H.
|關鍵字:||Electrochemical polymerization;Dye-sensitized solar cells (DSSCs);Triphenylamine-based indoline dye (TPAR);Polymer dye;TiO2;photoelectrode;electron-transport;high-efficiency;organic-dyes;films;recombination;conversion;impedance;energy;light;layer||Project:||Journal of Electroanalytical Chemistry||期刊/報告no：:||Journal of Electroanalytical Chemistry, Volume 631, Issue 1-2, Page(s) 43-51.||摘要:||
This study reports on the photophysical properties of a triphenylamine (TPA)-based indoline dye (TPAR) and its polymer-type dye (PTPAR) via electropolymerization, and their application in dye-sensitized solar cells (DSSCs). In the TPAR dye, the TPA group and rhodanine-3-acetic acid act as the basic electron donor and the electron acceptor, respectively. The TPA unit in TPAR is readily employed to perform electropolymerization due to its aniline derivative-like molecular structure. The resulting polymer dye (PTPAR) exhibits a network structure of pi-conjugation polymer chains that produce a significant blue shift in the absorption spectrum. This phenomenon stabilizes the intramolecular charge transfer from donor units to electron acceptors under light irradiation. The incident photon-to-current conversion efficiency (IPCE) of TPAR-sensitized DSSC has a higher value than PTPAR dye, exceeding 70% in the range of 470-510 nm. The lower IPCE of PTPAR-sensitized devices are ascribed to the blue shift of PTPAR dye. TPAR-based DSSC are more efficient (4.57%) than PTPAR-based DSSCs (3.04%). The efficiency of gel-type DSSCs is significantly lower similar to 47% than that of liquid-type DSSCs for both dyes. (C) 2009 Elsevier B.V. All rights reserved.
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