Effect of oligomer on dye-sensitized solar cells employing polymer electrolytes

Sung Hoon Ahn, Hye Weon Kim, Seul Hee Lee, Won Seok Chi, Jeong Rim Choi, Yong Gun Shul, Jong Hak Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The effect of oligomer (Mn=400-500 g/mol) on dye-sensitized solar cells (DSSC) employing polymer electrolytes consisting of poly(epichlorohydrin-co-ethylene oxide) (Epichlomer), LiI, 1-methyl-3-propylimidazolium iodide (MPII) and I2 is investigated. Five kinds of oligomer, poly(ethylene glycol) (PEG, Mn=400 and 1,000 g/mol), poly(ethylene glycol) dimethyl ether (PEGDME), poly(propylene glycol) (PPG) and poly(ethylene glycol) diglycidyl ether (PEGDGE), were introduced to elucidate the role of terminal groups and chain length. The coordinative interactions and structures of polymer electrolytes were characterized by FT-IR spectroscopy and X-ray diffraction (XRD). The improved interfacial contact between the electrolytes and the electrodes by the oligomer addition was confirmed using a field-emission scanning electron microscope (FE-SEM). The electrolytes exhibited ionic conductivities on the order of 10-4 S/cm, but PEGDGE electrolyte showed much lower value (~10-8 S/cm). As a result, the energy conversion efficiency of DSSC was significantly affected by the oligomer. For example, the DSSC employing PEGDME with methyl terminal groups exhibited 3.95% at 100 mW/cm2, which is 200-fold higher than that employing PEGDGE.

Original languageEnglish
Pages (from-to)138-142
Number of pages5
JournalKorean Journal of Chemical Engineering
Volume28
Issue number1
DOIs
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Fingerprint Dive into the research topics of 'Effect of oligomer on dye-sensitized solar cells employing polymer electrolytes'. Together they form a unique fingerprint.

  • Cite this