A polyblend electrolyte (PVP/PEG+KI+I2) for dye-sensitized nanocrystalline TiO2 solar cells

A novel polyblend electrolyte consisting of KI and beta dissolved in a blending polymer of polyvinyl pyrrolidone (PVP) and polyethylene glycol (PEG) was prepared. The formation of I3- in the polymer electrolyte was confirmed by X-ray photoelectron spectroscopy (XPS) characterization. Due to the coor...

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Bibliographic Details
Published in:Electrochimica acta 2007-05, Vol.52 (17), p.5334-5338
Main Authors: Wu, Jihuai, Li, Pinjiang, Hao, Sancun, Yang, Hongxun, Lan, Zhan
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Exact sciences and technology
Natural energy
Photovoltaic conversion
Solar cells. Photoelectrochemical cells
Solar energy
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Summary:A novel polyblend electrolyte consisting of KI and beta dissolved in a blending polymer of polyvinyl pyrrolidone (PVP) and polyethylene glycol (PEG) was prepared. The formation of I3- in the polymer electrolyte was confirmed by X-ray photoelectron spectroscopy (XPS) characterization. Due to the coordinating and plasticizing effect by PVP, the ionic conductivity of the polyblend electrolyte is enhanced. The highest ionic conductivity of 1.85mScm-1 for the polyblend electrolyte was achieved by optimizing the compositions as 40wt.% PVP+60wt.% PEG+0.05mmolg-1 beta+0.10mmolg-1 KI. Based on the polyblend electrolyte, a DSSC with fill factor of 0.59, short-circuit density of 9.77mAcm-2, open-circuit voltage of 698mV and light-to-electricity conversion efficiency of 4.01% was obtained under AM 1.5 irradiation (100mWcm-2).
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2006.12.067