A polarization-sensitive, self-powered, broadband and fast Ti3C2Tx MXene photodetector from visible to near-infrared driven by photogalvanic effects
A polarization-sensitive, self-powered, broadband and fast Ti3C2Tx MXene photodetector from visible to near-infrared driven by photogalvanic effects
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由光电效应驱动的从可见光到近红外的偏振敏感、自供电、宽带和快速 Ti3C2Tx MXene 光电探测器
DOI：
10.1007/s11467-022-1156-3
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发表时间：
2022-04
影响因子：
7.5
通讯作者：
Wangzhou Shi
中科院分区：
文献类型：
--
作者：
Bo Liu;Liyu Qian;Yanliang Zhao;Yiwen Zhang;Feng Liu;Yi Zhang;Yiqun Xie;Wangzhou Shi
宽带、自功率和偏振灵敏度是光电探测器的理想品质。然而，目前很少有光电探测器能够同时满足这些要求。在这里，我们提出了一种Ti 3C 2 Tx（MXene）光电探测器，它是由光电效应驱动的，具有令人印象深刻的性能。在1064 nm的线偏振激光照射下，在零偏压下产生偏振敏感光电流，消光比为1.11。同时，实现了32/28 ms的上升/下降时间和120的大开/关切换比的快速响应。此外，在940 nm和620 nm光以及白色光的照射下，探测器也产生了稳定的零偏光电流，表现出从近红外到可见光的宽带光响应。量子输运模拟表明，由于多层结构Ti 3C 2 Tx的空间反转对称性破缺，光电流效应在零偏压下极化光电流的产生中起着重要作用.这一结果为Ti 3C 2 Tx-MXene在低功耗高性能光电探测中的应用提供了新的思路。
Broadband, self-power, and polarization-sensitivity are desirable qualities for a photodetector. However, currently few photodetectors can fulfill these requirements simultaneously. Here, we propose a Ti 3 C 2 T x (MXene) photodetector that is driven by the photogalvanic effect with impressive performances. A polarization-sensitive photocurrent is generated at zero bias under the illumination of linearly polarized laser light of 1064 nm, with an extinction ratio of 1.11. Meanwhile, a fast response with a 32/28 ms rise/decay time and a large on/off switching ratio of 120 are achieved. Besides, a robust zero-bias photocurrent is also generated in the photodetector under the illumination of 940 and 620 nm light, as well as the white light, showing a broadband photoresponse from the near-infrared to visible. Moreover, quantum transport simulations indicate that the photogalvanic effect plays an important role in the generation of the polarized photocurrent at zero bias due to the broken space inversion symmetry of the stacked few-layer Ti 3 C 2 T x . Our results shed light on a potential application of the Ti 3 C 2 T x —MXene in the low-power photodetection with high performances.
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影响因子：
9.5
作者：
A. Hussain
通讯作者：
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影响因子：
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作者：
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影响因子：
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9.5
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影响因子：
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作者：
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通讯作者：
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