Localized Excitonic Electroluminescence from Carbon Nanodots

• DOI: 10.1021/acs.jpclett.1c04028
• Publication Date: 2022-02-09T22:31:00Z
• Authors: Guangsong Zheng; Ting Wang; Qing Lou; Chenglong Shen; Mengyuan Wu; Junlu Sun; Wenyu Ji; Jinhao Zang; Kaikai Liu; Lin Dong; Chongxin Shan
• Keywords: Nanodot

Localized excitons are expected to achieve high-performance electroluminescence and have been widely investigated in GaN-based light-emitting diodes (LEDs). Although carbon nanodot (CD) based LEDs achieved with the radiative recombination of electrons holes, localized excitonic has not reported before. In this Letter, electroluminescent devices fabricated using fluorescent CDs as an active layer. The show strong yellow emission a fluorescence quantum yield 76% Stokes shift 2.1 eV. CD-based present sub-bandgap turn-on voltage 2.4 V maximum luminance 60.2 cd m-2, which is lowest driving among devices. centers trap carriers effectively, resulting light emission. current results manifest that may furnish promising approach boost development LEDs.