钟志有, 朱 雅, 陈首部, 陆 轴.光电器件中有机半导体薄膜的光学和电学性质研究[J].中南民族大学学报自然科学版,2018,(4):67-72
光电器件中有机半导体薄膜的光学和电学性质研究
Optical and Electrical Properties of Organic Semiconductor Thin Films for Optoelectronic Devices
  
DOI:10.12130/znmdzk.20180414
中文关键词: 有机半导体  薄膜  光电性质
英文关键词: sorganic semiconductor,thin film,optical and electrical properties
基金项目:湖北省自然科学基金资助项目( 2011CDB418) ; 中央高校基本科研业务专项资金资助项目( CZP17002)
作者单位
钟志有1,2, 朱 雅1, 陈首部1, 陆 轴 1 中南民族大学 电子信息工程学院武汉 430074
2 中南民族大学 智能无线通信湖北省重点实验室 武汉 430074 
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中文摘要:
      采用真空热蒸发制备了 AlQ, BAlQ 和 NPB 有机半导体薄膜样品, 探讨了薄膜的透射、吸收和光学性质.制备了有机薄膜样品的夹心结构器件,研究了其电流-电压特性.结果表明: 有机薄膜的透明性能良好, AlQ 和 BAlQ 具有几乎相同的直接光学能隙(4.46 eV) ,大于 NPB 的能隙值(3.11 eV) . AlQ, BAlQ 和 NPB 内部自由载流子浓度具有相同的数量级(1022 m-3) ,但NPB 具有最高的零电场迁移率(1.75×10-8 cm·V-1·s-1) 和电导率(1.45×10-10 S·cm-1)
英文摘要:
      Organic semiconductor thin films of tris(8-hydroxy-quinoline) aluminum (AlQ) , aluminum (III) bis(2-methyl-8-quninolinato) -4-phenylphenolate (BAlQ) , and α-naphthylphenylbiphenyl amine (NPB) were deposited by vacuumsublimation.The transmission,abosorption and the optical properties of the thin films were investigated. In addition, the thin film devices of sandwich structure were fabricated and the current-voltage characteristics were studied. The results showed that the organic thin films were highly transparent. AlQ and BAlQ demonstrated almost the same direct energy bandgap (4.46 eV) , which was larger than that of NPB (3.11 eV) . The internal free carrier density of AlQ,BAlQ and NPB were of the same order of magnitude (1022 m-3) , whereas NPB exhibited the highest zero-field mobility (1.75×10-8 cm·V-1·s-1) and electrical conductivity (1.45×10-10 S·cm-1).
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