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High-Efficiency Single-Component Organic Light-Emitting Transistors

2019-08-23

Authors: Qin, ZS; Gao, HK; Liu, JY; Zhou, K; Li, J; Dang, YY; Huang, L; Deng, HX; Zhang, XT; Dong, HL; Hu, WP

ADVANCED MATERIALS

Early Access: AUG 2019 Language: English Document type: Article; Early Access

DOI: 10.1002/adma.201903175

Abstract:

Construction of high-performance organic light-emitting transistors (OLETs) remains challenging due to the limited desired organic semiconductor materials. Here, two superior high mobility emissive organic semiconductors, 2,6-diphenylanthracene (DPA) and 2,6-di(2-naphthyl) anthracene (dNaAnt), are introduced into the construction of OLETs. By optimizing the device geometry for balanced ambipolar efficient charge transport and using high-quality DPA and dNaAnt single crystals as active layers, high-efficiency single-component OLETs are successfully fabricated, with the demonstration of strong and spatially controlled light emission within both p- and n- conducting channels and output of high external quantum efficiency (EQE). The obtained EQE values in current devices are approaching 1.61% for DPA-OLETs and 1.75% for dNaAnt-based OLETs, respectively, which are the highest EQE values for single-component OLETs in the common device configuration reported so far. Moreover, high brightnesses of 1210 and 3180 cd m(-2) with current densities up to 1.3 and 8.4 kA cm(-2) are also achieved for DPA- and dNaAnt-based OLETs, respectively. These results demonstrate the great potential applications of high mobility emissive organic semiconductors for next-generation rapid development of high-performance single-component OLETs and their related organic integrated electro-optical devices.

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