CH3NH3PbI3/poly-3-hexylthiophen perovskite mesoscopic solar cells: Performance enhancement by Li-assisted hole conduction

Jin Hyuck Heo, Sang Hyuk Im

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

To address if the non-triphenylamine derivative hole transporting materials such as P3HT (poly-3-hexylthiophene) could also exhibit high device efficiency in mesoscopic MAPbI3 perovskite solar cells, we examined the effect of Li-TFSI (Li-bis(trifluoromethanesulfonyl) imide) and t-BP (4-tert-butylpyridine) additives added in P3HT on device performance. Unlike the triphenylamine HTMs, the P3HT thiophene HTM without amine moiety was not doped by the additives but its conductivity was significantly improved by the Li-TFSI/t-BP mediated additional hole conduction. By inclusion of Li-TFSI/t-BP additive, we could fabricate more efficient mesoscopic MAPbI3 perovskite solar cells with smaller hysteresis with respect to scan direction due to Li mediated additional hole conduction.

Original languageEnglish
Pages (from-to)816-821
Number of pages6
JournalPhysica Status Solidi - Rapid Research Letters
Volume8
Issue number10
DOIs
Publication statusPublished - 2014 Oct 1
Externally publishedYes

Keywords

  • CHNHPbI
  • Electrical conduction
  • P3HT
  • Perovskites
  • Solar cells

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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