Carbon nanodot-based flexible and self-powered white displays  

作　　者：Wei Zhang Qing Lou Junlu Sun Juan Liao Guangsong Zheng Fuhang Jiao Wu Chen Xiang Li Jiajia Meng Chong-Xin Shan Lin Dong 

机构地区：[1]Henan Key Laboratory of Diamond Optoelectronic Materials and Devices,Key Laboratory of Materials Physics,Ministry of Education,School of Physics,Zhengzhou University,Zhengzhou 450052,China

出　　处：《Nano Research》2025年第2期733-740,共8页纳米研究(英文版)

基　　金：This work is supported by the National Natural Science Foundation of China(Nos.U22A2077 and 11974317);China Postdoctoral Science Foundation(Nos.2023M733250 and GZC20232445);Henan Fundamental Research Leading Talent.

摘　　要：Carbon nanodots(CDs)have emerged as a promising luminescent material,showing significant potential in biological imaging,information security,and illumination displays withintheinternet of things(loT).However,CDs-based electroluminescent devices,especially flexible and self-powered white displays,remain scarcely reported,which limit their applications in human-machine interactions and wearable optoelectronics in the loT.Herein,we present a pioneering CDs-based flexible and self-powered white display system with a Commission Internationale de L'Eclairage(CIE)coordinate of(0.31,0.39)by integrating CDs-based alternating current electroluminescent(AcEL)devices with triboelectric nanogenerators.The CDs-based white ACEL devices can be dynamically modulated from light green to white under various supplied frequencies ranging from 50 to 500 Hz.The devices also render from cold white to warm white with correlated color temperature from 9705 to 4538 K,as the concentration ratios of ZnS:Cu phosphors to CDs change from 22:2 to 22:8.Furthermore,these devices exhibit excellent flexibility and stability,maintaining over 95%of their electroluminescent intensities after 4500 cycles even under a large bending angle of 180°with a bending radius of 4.9 mm.Finally,this CDs-based flexible and self-powered white display system is worn on the human body to realize real-time illumination display powered by biomechanical energy,such as hand slapping and walking.This work provides a novel design strategy toward high-performance CD-based flexible and self-powered white displays and expands their potential applications in wearable optoelectronics for the loT.

关 键 词：carbon nanodot(CD) self-powered system alternating current electroluminescence white display flexible devices 

分 类 号：TN3[电子电信—物理电子学]