Bright Multicolor Bandgap Fluorescent Carbon Quantum Dots for Electroluminescent Light-Emitting Diodes

Fanglong Yuan; Zhibin Wang; Xiaohong Li; Yunchao Li; Zhan'ao Tan; Louzhen Fan; Shihe Yang

doi:10.1002/adma.201604436

Bright Multicolor Bandgap Fluorescent Carbon Quantum Dots for Electroluminescent Light-Emitting Diodes

Adv Mater. 2017 Jan;29(3). doi: 10.1002/adma.201604436. Epub 2016 Nov 23.

Authors

Fanglong Yuan¹, Zhibin Wang², Xiaohong Li¹, Yunchao Li¹, Zhan'ao Tan², Louzhen Fan¹, Shihe Yang³

Affiliations

¹ Department of Chemistry, Beijing Normal University, Beijing, 100875, China.
² New and Renewable Energy of Beijing Key Laboratory, School of Renewable Energy, North China Electric Power University, Beijing, 102206, China.
³ Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.

PMID: 27879013
DOI: 10.1002/adma.201604436

Abstract

Multicolor bandgap fluorescent carbon quantum dots (MCBF-CQDs) from blue to red with quantum yield up to 75% are synthesized using a solvothermal method. For the first time, monochrome electroluminescent light-emitting diodes (LEDs) with MCBF-CQDs directly as an active emission layer are fabricated. The maximum luminance of blue LEDs reaches 136 cd m^-2 , which is the best performance for CQD-based monochrome electroluminescent LEDs.

Keywords: carbon quantum dots; fluorescent bandgap; high quantum yield; light-emitting diodes.