共轭聚合物中载流子迁移率的变温飞行时间检测  

Temperature Variable Time-of-Flight Measurement Technique Applied on Carrier Mobility in Conducting Polymer

作　　者：张雅婷[1,2,3] 徐章程[4,2] 姚建铨[3] 

机构地区：[1]天津大学化工学院化学工程国家重点实验室,天津300072 [2]南开大学泰达应用物理学院教育部弱光非线性光子学重点实验室,天津300457 [3]天津大学精密仪器与电子工程学院光电子信息技术科学教育部重点实验室,天津300072 [4]天津工业大学电子信息与工程学院,天津300387

出　　处：《中国激光》2012年第9期153-156,共4页Chinese Journal of Lasers

基　　金：国家自然科学基金(60976090);天津大学自主创新基金(11060302029)资助课题

摘　　要：载流子迁移率是标定共轭聚合物光电器件性能的重要参数,在数值上其大小远小于传统半导体材料,所以常常用飞行时间方法来测量。利用自行搭建的变温飞行时间检测系统,能够准确地测量聚合物中载流子的迁移率。从原理和实践上,讨论了影响检测结果的限制因素和关键参数,其中包括光生载流子数量、薄膜样品厚度、激发光脉冲宽度、检测外电路的响应时间、载流子在电介质中的弛豫时间和对放大器探测器频率的限制等。只有选取恰当的实验参数才能够获得准确可靠的检测结果。Carrier mobility is an important factor in conjugated polymer opto-electronic devices. Its value is much smaller than that of semiconductor material, so time-of-flight （TOF） is often used to measure it. By setting up a temperature variable TOF detection system, the carrier mobility in polymer can be accurately measured. In principle and practice, some of the key factors affecting the accuracy of test are discussed, including the limit in the number of optical generated carrier, film thickness, pulse width, the external circuit response time, carrier relaxation period in a dielectric, as well as frequency of amplifier and detector. The accurate and reliable results can be achieved only when experimental parameters are selected appropriately.

关 键 词：测量 飞行时间 载流子迁移率 共轭聚合物 

分 类 号：O433.1[机械工程—光学工程]