有机双层薄膜器件界面限制传导温度特性研究.pdfVIP

第29卷 第6期 半 导 体 学 报 Vo1．29 No．6 2008年6月 JOURNAL OF SEMIC0NDUCT0RS June，2008 Temperature Characteristics of Bilayer Thin--Film Devices Under Organic Interface Limited Current Conduction Yang Qingsen，Peng Yingquan ，KingH0ngwei，Li Xunshuan，Yuan Jianting， Ma Cha0zhu，and Zha0 Ming (School of Physical Science and Technology，Lanzhou University，Lanzhou 730000，China) Abstract：Temperature characteristics are important for the performance of organic thin film devices．On the basis of the hopping theory of Miller-Abrahams，an analytical model of charge transport for bilayer organic devices under the organic- organic interface limited current conduction is developed．The dependence of current，field，and carrier distribution in bi- layer organic devices with the structure of“injection electrode／Layer I／Layer 1I／collection electrode”on temperature are numerically analyzed．We conclude that，for a given applied voltage，when temperature is raised，the voltage of Layer 1 will increase，and the field will be higher．Meanwhile，the voltage of Layer l1 will decrease，the field will become weaker ac- cordingly．and the current of the device will increase． Keywords：organic-organicinterface limited；temperature characteristics；numerical analysis PACC：7280L CLC number：TN304．5O Document code：A Article ID：0253-4177(2008)06．1075-06 Bilayer OTFDs therefore have three current conduc． l IntrOductiOn ting states：the injection．1imited，the bulk．1imited，and