Improvement of external quantum efficiency depressed by visible light-absorbing hole transport material in solid-state semiconductor-sensitized heterojunction solar cells

Choong Sun Lim, Sang Hyuk Im, Jeong Ah Chang, Yong Hui Lee, Hi Jung Kim, Sang Il Seok

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A mesoporous (mp)-TiO 2/Sb 2S 3/P3HT [poly(3-hexylthiophene)] heterojunction solar cell displays reduced external quantum efficiency (EQE) at a wavelength of approximately 650 nm. This loss in EQE is due to incomplete charge carrier transport because the transportation of charge carriers generated in P3HT by the absorption of light into Sb 2S 3 was inefficient, and consequently, the carriers recombined. The depression of the EQE was greatly relieved by introducing the porous structure formed by thermal decomposition of 2,2′- azobisisobutyronitrile (AIBN) into the P3HT layer.

Original languageEnglish
Pages (from-to)429-432
Number of pages4
JournalNanoscale
Volume4
Issue number2
DOIs
Publication statusPublished - 2012 Jan 21
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)

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