Air-stable and efficient inorganic-organic heterojunction solar cells using PbS colloidal quantum dots co-capped by 1-dodecanethiol and oleic acid

Sungwoo Kim, Sang Hyuk Im, Meejae Kang, Jin Hyuck Heo, Sang Il Seok, Sang Wook Kim, Iván Mora-Seró, Juan Bisquert

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

PbS colloidal quantum dot (CQD)-sensitized inorganic-organic heterojunction solar cells fabricated by using the PbS CQDs co-capped by the oleic acid (OA) and 1-dodecanethiol (DT) ligand showed better device stability with aging time under ambient conditions without encapsulation. Furthermore, the device performance is better than the cell fabricated from PbS CQDs without DT ligand. The enhancement of performance in OA and DT co-capped systems is investigated by impedance spectroscopy. An upward displacement of the TiO 2 conduction band, with a consequent increase of V oc, results in the improved performance when CQD with DT are employed. This journal is

Original languageEnglish
Pages (from-to)14999-15002
Number of pages4
JournalPhysical Chemistry Chemical Physics
Volume14
Issue number43
DOIs
Publication statusPublished - 2012 Nov 21
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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