3D Dirac semimetal Cd3As2/CuPc heterojunction for promoted visible-infrared photo-detection

3D Dirac semimetal Cd3As2/CuPc heterojunction for promoted visible-infrared photo-detection
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用于促进可见红外光电检测的 3D 狄拉克半金属 Cd3As2/CuPc 异质结

DOI:
10.1016/j.optmat.2020.110699
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发表时间:
2021
期刊:
影响因子:
3.9
通讯作者:
Jun Wang
Jun Wang
中科院分区:
材料科学3区
文献类型:
--
作者:
Xingchao Zhang;Rui Pan;Yunkun Yang;Xianchao Liu;Jiayue Han;Hongxi Zhou;Jun Gou;Faxian Xiu;Jun Wang

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近年来,三维拓扑Dirac/Weyl半金属的发现为新型光电探测器开辟了一个新的前沿领域。砷化镉(Cd 3As 2)作为一种最具代表性的3D狄拉克半金属材料,具有超越石墨烯的超高电荷迁移率和强的光与物质相互作用。在此基础上,研制了基于微纳米尺度Cd 3As 2的光电探测器样机,该器件在808 nm近红外波段,即使在1 mV的微偏压下也具有较高的光电流响应,响应度可达4.65 A/W。此外,还进一步引入Cd 3As 2/CuPc异质结抑制了Dirac半金属Cd 3A 2纳米带的暗电流,有效提高了光电探测性能。Cd 3As 2/CuPc探测器在可见光(405 nm)至近红外(980 nm)区域的响应率(R)得到了显著提高,在808 nm激光照射下,探测器的最大R和最佳探测率(D*)分别达到142.5 A/W和7.83 × 1010 Jones。这些结果表明,三维狄拉克半金属Cd 3As 2及其异质结设计在高性能宽带探测器件中具有广阔的前景。
Recently, discovery of three-dimensional (3D) topological Dirac/Weyl semi-metal opens up a new frontier fields for neoteric type of photodetectors. As a most representative 3D Dirac semi-metal, Cadmium arsenide (Cd3As2) has ultra-high charge mobility beyond graphene and possess strong light and matter interaction. Herein, photodetector prototype based on micro-nanometer scaled Cd3As2was developed, which has high photocurrent response even under slight bias of 1 mV and its responsivity could be up to 4.65 A/W at near infrared waveband of 808 nm. Moreover, the Cd3As2/CuPc heterojunction was further introduced for suppress dark current of Dirac semimetal Cd3A2nanobelt that would effectively improve photoelectric detection performance. As expected, the responsivity (R) of Cd3As2/CuPc has been significantly enhanced in visible (405 nm) to near-infrared (980 nm) region, and maximumRand optimal detectivity (D*) of detector can be reach about 142.5 A/W and 7.83 × 1010Jones under irradiation of 808 nm laser, respectively. All of the results indicate that 3D Dirac semi-metal Cd3As2and its heterojunction design are great prospect applied in high-performance broadband detection devices.
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