Hysteresis-less mesoscopic CH3NH3PbI3 perovskite hybrid solar cells by introduction of Li-treated TiO2 electrode

Jin Hyuck Heo, Myoung Sang You, Min Hyuk Chang, Wenping Yin, Tae Kyu Ahn, Sang Ju Lee, Shi Joon Sung, Dae Hwan Kim, Sang Hyuk Im

Research output: Contribution to journalArticlepeer-review

245 Citations (Scopus)


A great current density-voltage (J-V) hysteresis with respect to the scan direction is important issue in perovskite hybrid solar cells because the power conversion efficiency is sometimes incorrect. Here, we demonstrated >17% mesoscopic CH3NH3PbI3 (MAPbI3) perovskite hybride solar cells without significant J-V hysteresis with respective to the scan direction and rated by using Li-treated mesoscopic TiO2 electrode. The Li-treated mesoscopic TiO2 electrode improved charge separation/injection from MAPbI3 into mesoscopic TiO2, charge transport in mesoscopic TiO2, and surface traps because the conduction band edge of mesoscopic TiO2 was lowered by ~0.1eV, the mobility of charge carriers was increased from ~1.1×10-6cm2/Vs to ~2.5×10-6cm2/Vs, the conductivity of mesoscopic TiO2 was increased from ~5.6×10-7S/cm to ~1.6×10-6S/cm, and the trap density was reduced from ~1.2×1016cm-3 to ~9.3×1015cm-3 through Li-treatment. Therefore, the average power conversion efficiency was significantly enhanced from 14.84% to 17.26% at 1sun condition by the Li-treatment of mesoscopic TiO2.

Original languageEnglish
Pages (from-to)530-539
Number of pages10
JournalNano Energy
Publication statusPublished - 2015 Jul 1
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2015.


  • Hybrid solar cells
  • J-V hysteresis
  • Li-treatment
  • Methylammoniumleadtriiodide
  • Perovskite

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science
  • Electrical and Electronic Engineering


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