Improved performance of CdS and dye co-sensitized solar cell using a TiO2 sol-gel solution

Minkyu Son, Hyunwoong Seo, Soo Kyoung Kim, Songyi Park, Myeong Soo Jeong, Hee Je Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

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 TiO2 sol-gel solution is suggested to fabricate the IL. An air exposure process after dipping into the TiO2 sol-gel solution facilitates formation of the anatase TiO2 thin film. To confirm the effect of TiO2 IL, the performance of CdS-dye CSC is analyzed and compared to the conventional CdS QD sensitized solar cell (QDSC). The formed TiO2 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 TiO2/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.

Original languageEnglish
Pages (from-to)1726-1731
Number of pages6
JournalPhysica Status Solidi (A) Applications and Materials Science
Volume211
Issue number8
DOIs
Publication statusPublished - Jan 1 2014

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Electrical and Electronic Engineering

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