Hysteresis-less and stable perovskite solar cells with a self-assembled monolayer

Ganbaatar Tumen-Ulzii, Toshinori Matsushima, Dino Klotz, Matthew R. Leyden, Pangpang Wang, Chuanjiang Qin, Jin Wook Lee, Sung Joon Lee, Yang Yang, Chihaya Adachi

Research output: Contribution to journalArticlepeer-review

71 Citations (Scopus)


Organic–inorganic halide perovskites are promising for use in solar cells because of their efficient solar power conversion. Current–voltage hysteresis and degradation under illumination are still issues that need to be solved for their future commercialization. However, why hysteresis and degradation occur in typical perovskite solar cell structures, with an electron transport layer of metal oxide such as SnO2, has not been well understood. Here we show that one reason for the hysteresis and degradation is because of the localization of positive ions caused by hydroxyl groups existing at the SnO2 surface. We deactivate these hydroxyl groups by treating the SnO2 surface with a self-assembled monolayer. With this surface treatment method, we demonstrate hysteresis-less and highly stable perovskite solar cells, with no degradation after 1000 h of continuous illumination.

Original languageEnglish
Article number31
JournalCommunications Materials
Issue number1
Publication statusPublished - Dec 2020

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials


Dive into the research topics of 'Hysteresis-less and stable perovskite solar cells with a self-assembled monolayer'. Together they form a unique fingerprint.

Cite this