NDLI: High-efficiency metal-free organic-dye-sensitized solar cells with hierarchical ZnO photoelectrode

Content Provider	Royal Society of Chemistry (RSC)
Author	Hsieh, Wen-Feng Cheng, Hsin-Ming
Copyright Year	2010
Abstract	Self-assembled ZnO secondary nanoparticles have been fabricated as an effective photoelectrode for dye-sensitized solar cells (DSCs). The hierarchical architecture, which manifested the significant light-scattering, can provide more photon harvesting. In addition, dye-molecule adsorption was sufficient due to enough internal surface area provided by the primary single nanocrystallites. Two indoline dyes, coded D149 and D205, were used as the sensitizers of ZnO DSCs with the optimal energy conversion efficiencies of 4.95% and 5.34%, respectively, under AM 1.5 full sunlight illumination (100 mW cm−2). The enhancement of the open-circuit photovoltage (Voc) and the short-circuit photocurrent density (Jsc) for D205-sensitized ZnO DSCs was ascribed to the effective suppression of electron recombination by extending the alkyl chain on the terminal rhodanine moiety from ethyl to octyl. Further evidence is obtained from the electrochemical impedance spectroscopy (EIS) which exhibits a longer electron lifetime for D205-sensitized ZnO DSC in comparison with the D149-sensitized one.
Starting Page	442
Ending Page	447
Page Count	6
File Format	HTM / HTML PDF
ISSN	17545692
Volume Number	3
Issue Number	4
Journal	Energy & Environmental Science
DOI	10.1039/b915725e
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	EIS DSC Dye-sensitized solar cell Photon Adsorption Indoline Amplitude modulation Photocurrent Carrier generation and recombination Alkyl Rhodanine Electrochemistry Electrical impedance Spectroscopy
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Renewable Energy, Sustainability and the Environment Nuclear Energy and Engineering

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