兰州大学机构库 >物理科学与技术学院
基于酞菁铜的有机光敏场效应晶体管的研究
Alternative TitleStudy on The Photoresponsive Organic Field-effect Transistors Based on CuPc
谢吉鹏
Thesis Advisor彭应全
2012-05-26
Degree Grantor兰州大学
Place of Conferral兰州
Degree Name硕士
Keyword酞菁铜 场效应 肖特基接触 明/暗电流比 光响应度
Abstract本论文基于常规平面结构的底栅顶接触有机场效应晶体管研究了CuPc有机功能层厚度对器件场效应特性的影响以及不同的电极材料对器件性能的影响。 研究发现,使用Au作为源/漏电极的CuPc 有机场效应晶体管具有良好的场效应特性,对于CuPc层厚度为50nm的器件,开/关比可以达到105,在-50V栅压、-50V漏压的条件下,可以获得超过650nA的电流。同时发现薄膜厚度对于器件性能具有影响,当薄膜厚度为50nm左右时,器件的场效应性能最好。但基于金电极的器件明/暗电流比仅不到1,光照下器件的开/关比约为103,-50V栅压、-50V漏压的条件下,50nm有机层厚度器件的光响应度约为2.55mA/W。 随后我们研究了Al作为漏/源电极,不同厚度的CuPc薄膜作为有机功能层的有机场效应晶体管性能。研究发现,以Al作为源漏电极的有机场效应晶体管在黑暗条件下不具有场效应特性。光照条件下器件则能够表现出良好的场效应特性。对于CuPc厚度为100nm的场效应器件,在-50V栅压,-50V漏压,波长655nm,光强100mW/cm2的红色激光下,器件的光生电流可达100nA以上,因此器件的开/关比和明/暗电流比均超过104,光响应度约为0.83mA/W,表现出明显的光敏场效应特性。
Other AbstractThis thesis is based on the conventional structure of the bottom gate top contact OFET with CuPc as active layer, and discuss different thickness of CuPc layer and different source/drain electrode materials influence on device performance. We found that OFET based on CuPc with Au as source/drain electrodes has typical FET characteristics. The device with a thickness of CuPc for 50nm, we found the thickness of organic active layer has important influence on device performance, when the thickness of CuPc is 50nm, and a Ion/Ioff ratio about 103 on illumination condition (wavelength 655nm, intensity 100mW/cm2), its photoresponsivity was about 2.55mA/W. It is found that no FET characteristics could be observed with Al as the drain and source electrodes without illumination. But the device showed good photosensitivity and FET characteristics on illumination condition. When the thickness of CuPc is 100 nm, both the gate voltage and drain voltage is -50V, under a illumination of red laser (wavelength 655nm, intensity 100mW/cm2), a photocurrent up to 100nA was obtained, the Ion/Ioff and Ipho/Idark ratio was higher than 104 while the photoresponsivity was about 0.83mA/W.
URL查看原文
Language中文
Document Type学位论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/229772
Collection物理科学与技术学院
Recommended Citation
GB/T 7714
谢吉鹏. 基于酞菁铜的有机光敏场效应晶体管的研究[D]. 兰州. 兰州大学,2012.
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