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基于酞菁钕为光敏层的红光光敏异质结有机场效应晶体管

发表时间:2014-02-15  浏览量:1574  下载量:666
全部作者: 汤瑜,姚博,吕文理,周茂清,郑挺才,刘金凤,罗消,彭应全
作者单位: 兰州大学物理科学与技术学院
摘 要: 合成了一种高吸收系数(~1.7×105 cm-1)的金属酞菁类光敏材料酞菁钕(NdPc2),该材料薄膜在可见光区638 nm处存在吸收峰,吸收峰靠近红光常用波段(650~670 nm);报道了NdPc2/C60异质结光敏有机场效应晶体管(organic field effect transistors, OFETs),该器件以NdPc2为光敏层,高迁移率材料C60为载流子传输层,性能明显优于NdPc2单层器件。在入射光强为1.41 m·W/cm2时,NdPc2/C60异质结器件的光响应度达到最大值0.8 A/W,是NdPc2单层器件的62倍。可以得出,合成的具有高吸收系数的NdPc2可作为光敏材料使用,同时NdPc2/C60异质结器件非常适用于红光探测器。
关 键 词: 半导体物理学;NdPc2/C60异质结;光敏有机场效应晶体管;光响应度;酞菁钕
Title: Red light sensitive heterojunction organic field-effect transistors based on neodymium phthalocyanine as photosensitive layer
Author: LIU Jinfeng, LUO Xiao, PENG Yingquan
Organization: School of Physical Science and Technology, Lanzhou University
Abstract: A metal phthalocyanine light-sensitive material, neodymium phthalocyanine (NdPc2), which has high absorption coefficient(~1.7�05 cm-1) was synthesized. The highest absorption peak in visible region of NdPc2 film is centered at 638 nm which is near the commonly used wavelength of red light (650-670 nm). NdPc2 and C60 were used in heterojunction photoresponsive organic field-effect transistors (photOFETs). In this device, NdPc2 was used as photosensitive layer, and n-type high mobility ratio material C60 was used as the carrier transport layer. Compared with single-layer NdPc2 photOFETs (NdPc2-photOFETs), C60/NdPc2 heterojunction photOFETs (C60/NdPc2-photOFETs) showed a better performance. The maximum photoresponsivity of C60/NdPc2-photOFETs is 0.8 A/W with the incident light intensity of 1.41 mW/cm2, which is approximately 62 times larger than that of NdPc2-photOFETs at the same condition. It is concluded that the synthesized NdPc2 with high absorption coefficient can be used as photosensitive material and C60/NdPc2-photOFETs are very suited for detecting red light.
Key words: semiconductor physics; NdPc2/C60 heterojunction; photoresponsive organic field-effect transistors; photoresponsivity; neodymium phthalocyanine
发表期数: 2014年2月第3期
引用格式: 汤瑜,姚博,吕文理,等. 基于酞菁钕为光敏层的红光光敏异质结有机场效应晶体管[J]. 中国科技论文在线精品论文,2014,7(3):247-253.
 
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