Song Qiaogang, Lin Tong, Su Zisheng, Chu Bei, Yang Huishan, Li Wenlian, Lee Chun-Sing
College of Physics and Information Engineering, Key Laboratory of Information Functional Material for Fujian Higher Education , Quanzhou Normal University , Quanzhou 362000 , People's Republic of China.
State Key Laboratory of Luminescence and Applications , Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences , Changchun 130033 , People's Republic of China.
J Phys Chem Lett. 2018 Dec 6;9(23):6818-6824. doi: 10.1021/acs.jpclett.8b02738. Epub 2018 Nov 19.
Compared to traditional near-infrared (NIR) imaging devices, NIR-to-visible upconversion displays, which integrated a NIR photodetector with a visible light-emitting diode, have merits of simple device structure, low cost, high resolution, and a simple pixelless structure. However, photon-to-photon upconversion efficiencies of these devices are typically much lower than unity. Here we report an all-organic NIR-to-visible upconversion display with a photon-to-photon upconversion efficiency higher than 100% by integrating a photomultiplying organic NIR photodetector with a high-efficiency thermally activated delayed fluorescent organic light-emitting diode. To the best of our knowledge, this is the first report showing a photon-to-photon upconversion efficiency over 100% without using a built-in transistor for current amplification.
与传统近红外（NIR）成像设备相比，将近红外光电探测器与可见光发光二极管集成在一起的近红外到可见光上转换显示器，具有设备结构简单、成本低、分辨率高和无像素结构简单的优点。然而，这些设备的光子到光子上转换效率通常远低于1。在这里，我们报告了一种全有机近红外到可见光上转换显示器，通过将光倍增有机近红外光电探测器与高效热激活延迟荧光有机发光二极管集成在一起，其光子到光子上转换效率高于100%。据我们所知，这是第一份在不使用内置晶体管进行电流放大的情况下，展示光子到光子上转换效率超过100%的报告。
