High-Efficiency Circularly Polarized Light-Emitting Diodes Based on Chiral Metal Nanoclusters

• Journal:Journal of American Chenical Society
• Abstract:Circularly polarized light-emitting diodes (CP-LEDs) are critical for next-generation optical technologies, ranging from holography to quantum information processing. Currently deployed chiral luminescent materials, with their intricate synthesis and processing and limited efficiency, are the main bottleneck for CP-LEDs. Chiral metal nanoclusters (MNCs) are potential CP-LED materials, given their ease of synthesis and processability as well as diverse structures and excited states. However, their films are usually plagued by inferior electronic quality and aggregation-caused photoluminescence quenching, necessitating their incorporation into host materials; without such a scheme, MNC-based LEDs exhibit external quantum efficiencies (EQEs) < 10%. Herein, we achieve an efficiency leap for both CP-LEDs and cluster-based LEDs by using novel chiral MNCs with aggregation-induced emission enhancement. CP-LEDs using enantiopure MNC films attain EQEs of up to 23.5%. Furthermore, by incorporating host materials, the devices yield record EQEs of up to 36.5% for both CP-LEDs and cluster-based LEDs, along with electroluminescence dissymmetry factors (|g(EL)|) of around 1.0 x 10(-3). These findings open a new avenue for advancing chiral light sources for next-generation
• Indexed by:Journal paper
• Discipline:Natural Science
• First-Level Discipline:Chemistry
• Volume:146
• Issue:6
• Page Number:4144-4152
• ISSN No.:1520-5126
• Translation or Not:no
• Date of Publication:2024-02-05
• Included Journals:SCI
• DOI number:10.1021/jacs.3c13065
• Impact Factor:14.4
• Links to published journals:https://pubs.acs.org/doi/10.1021/jacs.3c13065?ref=PDF