Performance enhancement through post-treatments of CdS-sensitized solar cells fabricated by spray pyrolysis deposition

Yong Hui Lee, Sang Hyuk Im, Jae Hui Rhee, Jong Heun Lee, Sang Il Seok

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

The CdS-sensitized solar cells (CdS-SSC) were fabricated by spray pyrolysis deposition (SPD) method. The performance of the cells was greatly improved through post-treatments that included thermal oxidation at 500 °C for 30 min in an air atmosphere and subsequent chemical etching by 40 mM aqueous HCl solution at room temperature for 30 min, as compared to as-deposited CdS-SSC. The CdS-SSC in a I-/I3- electrolyte system was resulted in the improvement of Jsc (3.3→5.2 mA/cm2), V (697→758 mV), FF (41.4%→46.9%), and (0.95%→1.84%). Similarly, the efficiency of CdS-SSC in a noncorrosive polysulfide electrolyte system was also enhanced by the proposed thermal oxidation and etching process. The increase in the cell efficiency is attributed to the reduced charge recombination among sensitizer themselves through the mitigation of overaggregated CdS sensitizers deposited by SPD.

Original languageEnglish
Pages (from-to)1648-1652
Number of pages5
JournalACS Applied Materials and Interfaces
Volume2
Issue number6
DOIs
Publication statusPublished - 2010 Jun 23

Keywords

  • cadmium oxide
  • cadmium sulfide
  • etching
  • oxidation
  • quantum dot-sensitized solar cell
  • spray pyrolysis deposition

ASJC Scopus subject areas

  • Materials Science(all)

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