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Improved performance of CdS and dye co‐sensitized solar cell using a TiO 2 sol–gel solution
Author(s) -
Son MinKyu,
Seo Hyunwoong,
Kim SooKyoung,
Park Songyi,
Jeong MyeongSoo,
Kim HeeJe
Publication year - 2014
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201330492
Subject(s) - electrolyte , solar cell , dye sensitized solar cell , materials science , anatase , quantum dot , chemical engineering , photovoltaic system , layer (electronics) , optoelectronics , nanotechnology , chemistry , electrode , photocatalysis , organic chemistry , catalysis , engineering , biology , ecology
An interfacial layer (IL) between the CdS quantum dot (QD) and dye is necessary in the CdS‐dye co‐sensitized solar cell (CSC) to prevent the corrosion of CdS and the damage of electrolyte. In this study, the simple method of using a TiO 2 sol–gel solution is suggested to fabricate the IL. An air exposure process after dipping into the TiO 2 sol–gel solution facilitates formation of the anatase TiO 2 thin film. To confirm the effect of TiO 2 IL, the performance of CdS‐dye CSC is analyzed and compared to the conventional CdS QD sensitized solar cell (QDSC). The formed TiO 2 IL effectively prevents the corrosion of CdS and the damage of electrolyte. In addition, this suppresses the electron recombination from the CdS to the electrolyte, resulting in the enhanced electron transport at the TiO 2 /CdS QD‐dye/electrolyte interface. As a result, the overall photovoltaic performance is much increased from 1.33% to 2.77%, compared to the conventional CdS QDSC.