High-performance transparent all-carbon photodetectors based on the semiconducting single-walled carbon nanotube/fullerene heterojunctions
doi:10.37188/CO.2022-0243
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摘要:
利用半导体性单壁碳纳米管(SWCNT)的高吸收系数、优异的光电特性和高载流子迁移率等特点,本文构筑了基于半导体SWCNT(sc-SWCNT)/富勒烯(C60)异质结的透明全碳宽光谱的场效应晶体管光电探测器。该器件的大部分结构均由碳基材料组成,全碳异质结作为导电沟道材料,金属性SWCNT作为源漏电极,氧化石墨烯(GO)作为介质层,在可见光波段的透光率均高于80%。电学测试结果表明:该光电探测器表现出了较强的栅控能力,实现了从405~1064 nm的可见光-近红外宽光谱响应,在5 mW/cm2的940 nm 照射下,该器件光电响应率可以达到18.55 A/W,比探测率达到5.35×1011Jones,同时,表现出了优异的循环稳定性。
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关键词:
- 单壁碳纳米管/
- 富勒烯/
- 全碳异质结/
- 高透明度/
- 场效应晶体管光电探测器
Abstract:Taking advantage of the high absorption coefficient, excellent photoelectric properties, and high carrier mobility of Single-Walled Carbon NanoTubes (SWCNTs), high-performance, transparent, all-carbon Field-Effect Transistor (FET) photodetector has been constructed with a high transmittance more than 80% in the visible light band, in which semiconducting SWCNT (sc-SWCNT)/fullerene (C60) heterojunctions as the channel materials, patterned metallic SWCNT film as source/drain electrodes, graphene oxide (GO) as the dielectric layer, and Indium Tin Oxide (ITO) as a transparent gate electrode. The electrical test results show that the photodetector exhibits a strong gate-tunable characteristics, and achieves a broadband spectral response from 405 to 1064 nm in the visible-near infrared spectral region. Under 940 nm illumination with a light density of 5 mW/cm2, the maximum photoelectric responsivity of 18.55 A/W and a specific detectivity of 5.35×1011Jones can be achieved.
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