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Bright and stable light-emitting diodes made with perovskite nanocrystals stabilized in metal–organic frameworks

Journal Article · · Nature Photonics
 [1];  [1];  [2];  [2];  [3];  [4];  [5];  [6];  [7];  [6];  [2];  [7];  [3];  [6];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); Stanford Univ., CA (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Academia Sinica, Taipei (Taiwan)
  5. National Taiwan Univ., Taipei (Taiwan); Argonne National Lab. (ANL), Argonne, IL (United States)
  6. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
  7. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Perovskite nanocrystals are exceptional candidates for light-emitting diodes (LEDs). However, they are unstable in the solid film and tend to degrade back to the bulk phase, which undermines their potential for LEDs. Here we demonstrate that perovskite nanocrystals stabilized in metal–organic framework (MOF) thin films make bright and stable LEDs. The perovskite nanocrystals in MOF thin films can maintain the photoluminescence and electroluminescence against continuous ultraviolet irradiation, heat and electrical stress. As revealed by optical and X-ray spectroscopy, the strong emission originates from localized carrier recombination. Bright LEDs made from perovskite-MOF nanocrystals are demonstrated with a maximum external quantum efficiency of over 15% and a high brightness of over 105 cd m-2 after the device reaches stabilization. During LED operation, the nanocrystals can be well preserved, free of ion migration or crystal merging through protection by the MOF matrix, leading to a stable performance over 50 hours.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
Ministry of Science and Technology of the Republic of China (MOST); National Academy of Sciences; National Science Foundation (NSF); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
89233218CNA000001; AC02-06CH11357; SC0012704
OSTI ID:
1831462
Alternate ID(s):
OSTI ID: 1854507
Report Number(s):
BNL-222844-2022-JAAM; 170892
Journal Information:
Nature Photonics, Journal Name: Nature Photonics Journal Issue: 11 Vol. 15; ISSN 1749-4885
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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