Luminescent Copper(I) Halides for Optoelectronic Applications

Jun Yin, Qiong Lei, Yu Han, Osman M. Bakr, Omar F. Mohammed

Research output: Journal article publicationReview articleAcademic researchpeer-review

25 Citations (Scopus)


Lead-free copper(I) halides have been demonstrated to exhibit high photoluminescence quantum yields with high air and light stability, making them one of the most promising semiconductors for next-generation light-emitting diode devices. The low-dimensional structures and soft lattices of Cu(I) halides induce the formation of self-trapped excitons (STEs) to achieve broadband emissions with high quantum yields. Herein, the recent studies on the electronic and optical properties of Cu(I) halides (i.e., Cs3Cu2X5, CsCu2X3, and A2CuX3, where A = K+ or Rb+, X = Cl, Br, or I) are reviewed and particular emphasis is placed on the role of the dimensionality and the halide in governing the electronic and optical properties (e.g., emission color and photoluminescence efficiency) via STEs. Several optoelectronic applications of Cu(I) halides are also discussed. In the last section, perspectives and challenges for the future development of Cu(I) halides in both optoelectronic and photocatalytic applications are outlined.

Original languageEnglish
Article number2100138
JournalPhysica Status Solidi - Rapid Research Letters
Issue number12
Publication statusPublished - Dec 2021


  • copper halides
  • optoelectronic devices
  • photoluminescence
  • self-trapped excitons

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics


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