Highly efficient and stable hybrid quantum-dot light-emitting field-effect transistors,Materials Horizons

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Highly efficient and stable hybrid quantum-dot light-emitting field-effect transistors
Materials Horizons ( IF 12.2 ) Pub Date : 2020-07-06 , DOI: 10.1039/d0mh00951b
Penghui He _{1,

2,

3,

4} , Linfeng Lan _{1,

2,

3,

4} , Caihao Deng _{1,

2,

3,

4} , Jian Wang _{1,

2,

3,

4} , Junbiao Peng _{1,

2,

3,

4} , Yong Cao _{1,

2,

3,

4}

Affiliation

Light-emitting field-effect transistors (LETs) have drawn much attention for their special capability of combining switching and electroluminescence capacity in a single device. Herein, we report a colour-saturated, high-efficiency red quantum-dot hybrid light-emitting field-effect transistor (QD-HLET) with a solution-processed InScO/ZnO-nanoparticle heterojunction channel layer and a deep-level organic hole transport layer (HLT). The red QD-HLET exhibits a field-effect mobility of 3.1 cm² V⁻¹ s⁻¹ with an on/off ratio of ∼10⁵, a maximum brightness of 145 000 cd m⁻² with a peak external quantum efficiency (EQE) of 22.8% and low efficiency roll-off (an EQE of 17.0% at a brightness of 100 000 cd m⁻²). In addition, the operating stability of the HLET is investigated by monitoring the time-dependent change in the brightness of the QD-HLET under various V_GS, while an operational lifetime of more than 153 000 hours at 100 cd m⁻² is achieved. A comprehensive study on the electrical and optical characteristics of the red QD-HLET under different operation modes is conducted, and an operation model is proposed.

中文翻译：

高效稳定的混合量子点发光场效应晶体管

发光场效应晶体管（LET）因其在单个器件中结合开关和电致发光功能的特殊功能而备受关注。在此，我们报道了一种具有溶液处理的InScO / ZnO-纳米粒子异质结沟道层和深层有机空穴传输的色饱和，高效红色量子点混合型场效应晶体管（QD-HLET）层（HLT）。红色QD-HLET的场效应迁移率为3.1 cm ² V ^-1 s ^-1，开/关比约为^{10 5}，最大亮度为145 000 cd m ^-2，具有峰值外部量子效率（EQE））的22.8％和低效率衰减（在100000 cd m的亮度下的EQE为17.0％）^-2）。另外，通过监测在各种V _GS下QD-HLET的亮度随时间的变化来研究HLET的操作稳定性，同时在100 cd m^-2的条件下可获得超过153 000小时的使用寿命。对红色QD-HLET在不同工作模式下的电学和光学特性进行了综合研究，并提出了一种工作模型。

更新日期：2020-09-01

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