题目:Visualizing Near Infrared Light (近红外光的可视化)
主讲:朱福荣教授
时间:11月19日 上午10:00
地点:能源研究院 1517报告厅
主办:能源研究院
主讲简介:朱福荣,教授、博士生导师。于1983年和1986年在复旦大学物理系分别获得学士和硕士学位。1993年获得澳大利亚查尔斯达尔文大学(Charies Darwin University)物理系博士学位。1993至1995年,在日本京都大学电气与电子工程系从事博士后研究。1995年至1997年,于澳大利亚莫道克大学(Murdoch University)物理系任研究员,从事等离子体化学气相沉积硅薄膜器件的研究工作。从2005年起担任新加坡材料研究院有机电致发光二极管和有机太阳能电池研发部门主管。2009年被香港浸会大学物理系聘为教授,目前担任香港浸会大学先进材料研究院(Institute of Advanced Materials)副主任, 有机电子卓越研究中心(Research Centre of Excellence for Organic Electronics)主任。主要研究方向包括:1)高效有机太阳能电池;2)有机电致发光二极管的显示及白光照明;3)有机光电器件物理、表面和界面物理;4)有机薄膜晶体管和传感器的应用。已发表一百五十余篇研究论文,论文被他引超过4000余次。获邀在国际会议上做特邀专题报告40余次。申请美国、日本和新加坡等国的相关发明专利8项。
主讲内容:Near infrared (NIR) to visible light up-conversion is of significant importance in many applications including thermal imaging, bio-imaging, night vision and wellness monitoring. This talk will discuss the development of a high performing NIR to saturated green light up-conversion device, comprising a front solution processable organic bulk heterojunction NIR charge generation layer (CGL) and an upper CsPbBr3 perovskite light-emitting diode (PeLED) unit. The NIR CGL, based on a blend of the NIR sensitive donor polymer and a nonfullerene acceptor, enables an efficient hole injection in the CsPbBr3 PeLED in the presence of NIR light and also serves as an optical out-coupling layer to enhance the visible light emission by the CsPbBr3 PeLED. The CsPbBr3 PeLED has a narrow emission spectrum with a peak wavelength of 520 nm, corresponding to the wavelengths near the peak response of the human eye, and has the advantage in imaging applications. Based on the up-conversion process, a pixel-less NIR to visible light imaging device was demonstrated, which can be operated at a low voltage of 3 V. The NIR to visible light up-conversion technique demonstrated in this work would provide significant cost benefits as well as the functional superiority for a broad range of NIR imaging applications.
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