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Enhancing the light conversion efficiency of dye-sensitized solar cells using nanochannel TiO2 prepared by spray pyrolysis

Title
Enhancing the light conversion efficiency of dye-sensitized solar cells using nanochannel TiO2 prepared by spray pyrolysis
Author
장영욱
Keywords
dye-sensitized solar cells (DSSCs); porous particles; spray pyrolysis; enhancement of photoconversion efficiency; photoelectrode structure; NANOTUBE ARRAYS; FILMS; CIRCUIT
Issue Date
2017-11
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ELECTROCHIMICA ACTA, v. 253, Page. 390-395
Abstract
To enhance the photoelectric conversion efficiency of dye-sensitized solar cells (DSSCs), micron-size nanochannel TiO2 particles were prepared by spray pyrolysis employing a triblock copolymer as a pore former. The as-prepared nanochannel TiO2 was used to fabricate DSSC photoelectrodes, increasing the active area of TiO2/dye/electrolyte for improving charge transfer. Field emission scanning electron microscopy, transmission electron microscopy, and Brunauer-Emmett-Teller analyses were performed to determine the morphologies and characteristic properties (e.g., porosity) of TiO2 particles with nanochannels obtained for various copolymer amounts. The synthesized TiO2 was made into a paste and applied to DSSC photoelectrodes, resulting in a substantially increased photoconversion efficiency (7.76%) compared to that of a copolymer-free TiO2-based DSSC (3.55%). The amounts of impregnated dye in TiO2-based photoelectrode films prepared using various copolymer amounts were compared using UV-vis absorbance analysis, being substantially increased by triblock copolymer addition. (C) 2017 Published by Elsevier Ltd.
URI
https://www.sciencedirect.com/science/article/pii/S0013468617319254https://repository.hanyang.ac.kr/handle/20.500.11754/72638
ISSN
0013-4686; 1873-3859
DOI
10.1016/j.electacta.2017.09.054
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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