Transition metal oxides as hole-transporting materials in organic semiconductor and hybrid perovskite based solar cells

Pingli Qin, Qin He, Dan Ouyang, Guojia Fang, Wallace C.H. Choy, Gang Li

Research output: Journal article publicationReview articleAcademic researchpeer-review

37 Citations (Scopus)


Organic polymer solar cells (OSCs) and organic-inorganic hybrid perovskite solar cells (PSCs) have achieved notable progress over the past several years. A central topic in these fields is exploring electronically efficient, stable and effective hole-transporting layer (HTL) materials. The goal is to enhance hole-collection ability, reduce charge recombination, increase built-in voltage, and hence improve the performance as well as the device stability. Transition metal oxides (TMOs) semiconductors such as NiOx, CuOx, CrOx, MoOx, WO3, and V2O5, have been widely used as HTLs in OSCs. These TMOs are naturally adopted into PSC as HTLs and shows their importance. There are similarities, and also differences in applying TMOs in these two types of main solution processed solar cells. This concise review is on the recent developments of transition metal oxide HTL in OSCs and PSCs. The paper starts from the discussion of the cation valence and electronic structure of the transition metal oxide materials, followed by analyzing the structure-property relationships of these HTLs, which we attempt to give a systematic introduction about the influences of their cation valence, electronic structure, work function and film property on device performance.
Original languageEnglish
Pages (from-to)472-489
Number of pages18
JournalScience China Chemistry
Issue number4
Publication statusPublished - 1 Apr 2017


  • hole-transporting layer
  • organic solar cell
  • perovskite solar cell
  • transition metal oxide

ASJC Scopus subject areas

  • Chemistry(all)

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