Enhancing dye-sensitized solar cell efficiency by anode surface treatments

Chao Hsuan Chang, Hsin Han Lin, Chin Cheng Chen, Franklin C.N. Hong

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this study, titanium substrates treated with HF solution and KOH solution sequentially forming micro- and nano-structures were used for the fabrication of flexible dye-sensitized solar cells (DSSCs). After wet etching treatments, the titanium substrates were then exposed to the O 2 plasma treatment and further immersed in titanium tetrachloride (TiCl 4 ) solution. The process conditions for producing a very thin TiO 2 blocking layer were studied, in order to avoid solar cell current leakage for increasing the solar cell efficiency. Subsequently, TiO 2 nanoparticles were spin-coated on Ti substrates with varied thickness. The dye-sensitized solar cells on the titanium substrates were subjected to simulate AM 1.5 G irradiation of 100 mW/cm 2 using backside illumination mode. Surface treatments of Ti substrate and TiO 2 anode were found to play a significant role in improving the efficiency of DSSC. The efficiencies of the backside illumination solar cells were raised from 4.6% to 7.8% by integrating these surface treatments.

Original languageEnglish
Pages (from-to)204-208
Number of pages5
JournalThin Solid Films
Volume570
Issue numberPB
DOIs
Publication statusPublished - Nov 3 2014
Externally publishedYes

Keywords

  • Back illumination
  • Dye-sensitized solar cells
  • Flexible
  • Micro-nanostructures
  • plasma treatment
  • Titanium tetrachloride (TiCl ) and oxygen

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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