化学
纳米团簇
电致发光
光致发光
二极管
光电子学
量子产额
发光二极管
量子效率
材料科学
光学
荧光
有机化学
物理
图层(电子)
作者
Jianxun Lu,Bingyao Shao,Ren‐Wu Huang,Luis Gutiérrez‐Arzaluz,Shulin Chen,Zhen Han,Jun Yin,Hancheng Zhu,Sergey V. Dayneko,Mohamed Nejib Hedhili,Xin Song,Peng Yuan,Chunwei Dong,Rong Zhou,Makhsud I. Saidaminov,Shuang‐Quan Zang,Omar F. Mohammed,Osman M. Bakr
摘要
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 (|gEL|) of around 1.0 × 10–3. These findings open a new avenue for advancing chiral light sources for next-generation optoelectronics.
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