Wu Zhongbin, Liu Yuan, Guo Erjuan, Darbandy Ghader, Wang Shu-Jen, Hübner René, Kloes Alexander, Kleemann Hans, Leo Karl
Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, Xi'an, China.
Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universität Dresden, Dresden, Germany.
Nat Mater. 2021 Jul;20(7):1007-1014. doi: 10.1038/s41563-021-00937-0. Epub 2021 Mar 1.
Organic light-emitting transistors, three-terminal devices combining a thin-film transistor with a light-emitting diode, have generated increasing interest in organic electronics. However, increasing their efficiency while keeping the operating voltage low still remains a key challenge. Here, we demonstrate organic permeable base light-emitting transistors; these three-terminal vertical optoelectronic devices operate at driving voltages below 5.0 V; emit in the red, green and blue ranges; and reach, respectively, peak external quantum efficiencies of 19.6%, 24.6% and 11.8%, current efficiencies of 20.6 cd A, 90.1 cd A and 27.1 cd A and maximum luminance values of 9,833 cd m, 12,513 cd m and 4,753 cd m. Our simulations demonstrate that the nano-pore permeable base electrode located at the centre of the device, which forms a distinctive optical microcavity and regulates charge carrier injection and transport, is the key to the good performance obtained. Our work paves the way towards efficient and low-voltage organic light-emitting transistors, useful for power-efficient active matrix displays and solid-state lighting.
有机发光晶体管是一种将薄膜晶体管与发光二极管相结合的三端器件，在有机电子学领域引起了越来越多的关注。然而，在保持低工作电压的同时提高其效率仍然是一个关键挑战。在此，我们展示了有机渗透基发光晶体管；这些三端垂直光电器件在低于5.0 V的驱动电压下工作；发出红、绿、蓝三色光；分别达到19.6%、24.6%和11.8%的峰值外量子效率，20.6 cd A、90.1 cd A和27.1 cd A的电流效率，以及9833 cd m、12513 cd m和4753 cd m的最大亮度值。我们的模拟表明，位于器件中心的纳米孔渗透基电极形成了独特的光学微腔，并调节了电荷载流子的注入和传输，这是获得良好性能的关键。我们的工作为高效、低电压有机发光晶体管铺平了道路，可用于高效有源矩阵显示器和固态照明。
