材料科学
有机发光二极管
共轭体系
聚合物
光电子学
白色(突变)
电压
白光
纳米技术
电气工程
图层(电子)
复合材料
生物化学
化学
工程类
基因
作者
Tao Wang,Xiu‐Fang Song,Zhongyan Huang,Jingsheng Miao,Zhanxiang Chen,Yanxiang Cheng,Chuluo Yang
标识
DOI:10.1002/adom.202303067
摘要
Abstract Color‐tunable luminescent polymers are highly desirable materials for meeting the daily needs of humans in terms of circadian rhythm, yet they are rarely reported. Herein, a feasible approach is developed for color‐tunable thermally activated delayed fluorescence (TADF) conjugated polymers by incorporating green and red TADF units into blue fluorescent polymeric backbone. The solution‐processed OLEDs based on the synthesized polymers exhibit high‐efficiency red emission with a maximum external quantum efficiency (EQE max ) of 26.1% under low voltage (6 V). With a slight increase in voltage, warm white emission with EQE max of 23.9%, color rendering index (CRI) of 76 and low corelated color temperature (CCT) of 1700 K is obtained. These results represent the highest efficiencies among the red and warm white OLEDs based on TADF polymers, respectively. Intriguingly, under higher voltage (10 V), warm white emission with high CRI of 87, CCT of 3216 K, and luminance of over 5300 cd m −2 is accessible. This work provides a promising approach for intelligent lighting by voltage‐regulating white OLEDs.
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