有机/无机复合结构的近红外-可见光上转换器件研究

项目名称： 有机/无机复合结构的近红外-可见光上转换器件研究

项目编号： No.61307044

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 陈俊

作者单位： 苏州大学

项目金额： 25万元

中文摘要： 近红外波段（约1.5 微米）探测在军事和民用领域都具有非常重要的应用，而目前硅CCD成像器件的光探测波长范围短于1微米。有机/无机复合结构（铟镓砷/OLED）近红外上转换器件将近红外光转换成可见光，进而能够与硅CCD组合实现红外探测。该复合结构克服了无机材料集成时晶格匹配的要求，同时具备有机材料的易加工性和无机材料的高量子效率。本项目将通过集成顶发射OLED和在铟镓砷探测器内引入电流增益等方案提高有机/无机上转换器件的性能,研制具有光放大功能的上转换器件。在此基础上，还将研制有机/无机复合结构的新型上转换成像器件，不同于传统的成像方案，即增加像素的方式来提高分辨率，该器件通过无像素的方案，在成像器件中控制光生电流的横向分布来提高分辨率,可极大简化制备工艺并降低红外成像的成本，解决传统红外成像的低分辨率问题。本项目的研究将促进大面积、低成本、高分辨的新型红外成像器件研制。

中文关键词： 近红外；铟镓砷；上转换；界面；优化

英文摘要： The widely available charge coupled device (CCD) and lately CMOS imaging devices have created many applications on a mass scale. However these devices are limited to wavelengths shorter than about 1 μm. Hybrid photon upconversion devices have been developed recently. The end goal is to achieve an alternative technology for imaging in the 1.5-μm region. The hybrid upconversion idea relies on the integration of an infared photodetector and an OLED. Under a forward bias for the OLED, the detected signal in the photodetector is sent to the OLED, resulting in an increase in emission at a shorter wavelength and therefore achieving optical upconversion. As each organic molecule is a topologically perfect structure, the growth of each organic layer does not require "lattice matching", which has been the fundamental limit for inorganic semiconductor monolithic devices.To improve the performance of hybrid upconverter, this proposal will be focused on the issues: Firstly,embedding a metal mirror can substantially enhance the upconversion efficiency by optimizing the top-emission OLED and increasing infrared absorption efficiency.The overall upconversion efficiency can also be increased significantly, by introducing a gain mechanism into the photodetector section of the upconverter. A promising option to implement gain is a

英文关键词： near infrared；InGaAs；upconverter；interface；optimization