@article{Zhou2022, 
author = {Ke Zhou and Jian Tang and Shaofan Fang and Ke Jiang and Fangxu Yang and Deyang Ji and Jing Xiang and Jie Liu and Huanli Dong and Cheng Han and Hanlin Hu and Xiaotao Zhang and Wenping Hu and Yumeng Shi},
title = {Efficient energy transfer in organic light-emitting transistor with tunable wavelength},
year = {2022},
journal = {Nano Research},
volume = {15},
number = {4},
pages = {3647-3652},
keywords = {energy transfer, color tunability, organic light-emitting transistor (OLET), Förster resonance energy transfer (FRET)},
url = {https://www.sciopen.com/article/10.1007/s12274-021-3959-x},
doi = {10.1007/s12274-021-3959-x},
abstract = {Key challenges in the development of organic light-emitting transistors (OLETs) are blocking both scientific research and practical applications of these devices, e.g., the absence of high-mobility emissive organic semiconductor materials, low device efficiency, and color tunability. Here, we report a novel device configuration called the energy transfer organic light-emitting transistor (ET-OLET) that is intended to overcome these challenges. An organic fluorescent dye-doped polymethyl methacrylate (PMMA) layer is inserted below the conventional high-mobility organic semiconductor layer in a single-component OLET to separate the functions of the charge transport and light-emitting layers, thus making the challenge to essentially integrate the high mobility and emissive functions within a single organic semiconductor in a conventional OLET or multilayer OLET unnecessary. In this architecture, there is little change in mobility, but the external quantum efficiency (EQE) of the ET-OLET is more than six times that of the conventional OLET because of the efficient Förster resonance energy transfer, which avoids exciton-charge annihilation. In addition, the emission color can be tuned from blue to white to green-yellow using the source-drain and gate voltages. The proposed structure is promising for use with electrically pumped organic lasers.}
}