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短波长红外有机发光二极管来自A-D-A'-D-A型小分子,其辐射超出1100nm

Wansheng Liu¹, Suinan Deng¹, Lianjie Zhang¹

¹Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, P. R. China.

Advanced materials (Deerfield Beach, Fla.)

|June 1, 2023

概括

新型的小分子使得高性能短波长红外线 (SWIR) 有机发光二极管 (OLED) 成为可能. 这些SWIR OLED实现了低开启电压的明亮发射,克服了以前的限制.

科学领域:

材料科学材料科学材料科学
有机电子有机电子
光子学是一个光子学.

背景情况:

短波红外 (SWIR) 有机发光二极管 (OLED) 对于生物成像和光通信等应用至关重要.
在SWIR OLED中实现高亮度是具有挑战性的,因为能量差距规律的限制.

研究的目的:

开发使用新型A-D-A'-D-A型小分子的高性能SWIR OLED.
研究这些分子在SWIR OLED中克服亮度限制的潜力.

主要方法:

新型A-D-A'-D-A型小分子 (NTQ和BTQ) 的合成和表征.
使用NTQ和BTQ作为发射材料制造和测试SWIR OLED.
分析电光发射 (EL) 特性,包括排放峰值,效率滚动,电流密度,辐射出路量和开启电压.

主要成果:

由于多个D-A效应,NTQ和BTQ呈现出狭窄的光学间隙 (1.23和1.13 eV).
在1140nm (NTQ) 和1175nm (BTQ) 达到峰值的SWIR EL发射.
基于NTQ的OLED显示最大辐射输出强度为1.12 mW cm−2,效率滚动值微不足道,运行电流密度高 (5200 mA cm−2).
基于NTQ的OLED显示0.85V的低开启电压,接近物理极限.

结论:

A-D-A'-D-A型的小分子对高性能SWIR发射材料来说是有希望的.
开发的分子有效地解决了SWIR OLED的亮度和效率挑战.
这项研究为先进的SWIR光电子设备铺平了道路.

关键词:

A-D-A′-D-A型的小分子有多个DA效应.有机发光装置有机发光装置短波红外线是短波长的红外线.亚间隙开启电压的启动电压.

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