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Halide perovskite-polymer composite film for bright and stable light-emitting devices

Journal Article · · Advanced Composites and Hybrid Materials
 [1];  [2];  [2];  [2];  [3];  [3];  [3];  [3];  [3];  [4];  [2];  [2];  [5];  [6];  [2]
  1. Jiangsu University of Science and Technology (China); University of Arkansas at Pine Bluff, AR (United States)
  2. University of Arkansas at Pine Bluff, AR (United States)
  3. University of North Texas, Denton, TX (United States)
  4. University of Arkansas at Little Rock, AR (United States)
  5. Jiangsu University of Science and Technology (China)
  6. Northumbria University, Newcastle Upon Tyne (United Kingdom)
Stability is the primary hindrance for the application of halide perovskite material in light-emitting devices, solar cells, and other devices. In this work, halide perovskite and polymer composite film have been prepared for stable and bright light-emitting devices. Pure-phase Cs4PbBr6 crystals have been synthesized, and their photoluminescence (PL) properties and fluorescence lifetimes have been investigated. The Cs4PbBr6 crystals exhibited high uniformity but underwent rapid photodegradation under light irradiation. To address this issue, we prepared bright light-emitting devices using composite of Cs4PbBr6 crystals and polyethylene oxide (PEO) as the emission layer. The aim was to improve the optical and physical properties of halide perovskites, such as photodegradation and stability. PEO, with its excellent film-forming ability, created a uniform and dense film on the halide perovskite surface, filling microscopic defects and providing a protective barrier. FTIR, morphology, and PL analyses confirmed the protective role of the halide perovskite and polymer composite film. The composite film light-emitting devices demonstrated improved stability and higher PL brightness, with a peak brightness approaching 3 × 108 cd/m2, which was approximately 75% higher than the pure halide perovskite devices.
Research Organization:
University of Arkansas at Pine Bluff, AR (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0004114
OSTI ID:
3014806
Journal Information:
Advanced Composites and Hybrid Materials, Journal Name: Advanced Composites and Hybrid Materials Journal Issue: 2 Vol. 8; ISSN 2522-0136; ISSN 2522-0128
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

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