Mesoscopic CH3NH3PbI3 perovskite solar cells using TiO2 inverse opal electron-conducting scaffolds

Su Jin Ha, Jin Hyuck Heo, Sang Hyuk Im, Jun Hyuk Moon

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

One of the current needs of applications involving perovskite solar cells is reducing the hysteresis of the current density-voltage response with respect to the scan direction and rate. This reduction enables high and stable power conversion efficiency (η). For this purpose, a mesoscopic electron conductor with low trap density and high electron conductivity that balances charge flux is highly desirable. In the present study, we prepared a mesoscopic inverse opal (meso-IO) film with a three-dimensionally interconnected porous structure and used it as an electron-conducting scaffold for perovskite solar cells. We controlled the thickness of the meso-IO scaffold and determined its effect on the cells' photovoltaic performance. Solar cells using the 600 nm thick meso-IO scaffold exhibited a maximum η of 17.1%, no hysteresis of photocurrent density between forward and reverse scan directions, as well as hysteresis of η of only 0.5% p.

Original languageEnglish
Pages (from-to)1972-1977
Number of pages6
JournalJournal of Materials Chemistry A
Volume5
Issue number5
DOIs
Publication statusPublished - 2017 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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