ferroelectric-domain-defined black phosphorus homojunction photodetector
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Ultra-sensitive polarization-resolved black phosphorus homojunction photodetector defined by ferroelectric domains
Shuaiqin Wu, Yan Chen, Xudong Wang, Hanxue Jiao, Qianru Zhao, Xinning Huang, Xiaochi Tai, Yong Zhou, Hao Chen, Xingjun Wang, Shenyang Huang, Hugen Yan, Tie Lin, Hong Shen, Weida Hu, Xiangjian Meng, Junhao Chu, Jianlu Wang
Research context
Abstract With the further miniaturization and integration of multi-dimensional optical information detection devices, polarization-sensitive photodetectors based on anisotropic low-dimension materials have attractive potential applications. However, the performance of these devices is restricted by intrinsic property of materials leading to a small polarization ratio of the detectors. Here, we construct a black phosphorus (BP) homojunction photodetector defined by ferroelectric domains with ultra-sensitive polarization photoresponse. With the modulation of ferroelectric field, the BP exhibits anisotropic dispersion changes, leading an increased photothermalelectric (PTE) current in the armchair (AC) direction. Moreover, the PN junction can promote the PTE current and accelerate carrier separation. As a result, the BP photodetector demonstrates an ultrahigh polarization ratio (PR) of 288 at 1450 nm incident light, a large photoresponsivity of 1.06 A/W, and a high detectivity of 1.27 × 10 11 cmHz 1/2 W −1 at room temperature. This work reveals the great potential of BP in future polarized light detection.
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black phosphorus
Source PDF · page 1photothermoelectric contribution in the detector
Source PDF · page 3polarization ratio 288 at 1450 nm
Source PDF · page 1Cite / 引用
Shuaiqin Wu, Yan Chen, Xudong Wang, Hanxue Jiao, Qianru Zhao, Xinning Huang, Xiaochi Tai, Yong Zhou, Hao Chen, Xingjun Wang, Shenyang Huang, Hugen Yan, Tie Lin, Hong Shen, Weida Hu, Xiangjian Meng, Junhao Chu, Jianlu Wang. Ultra-sensitive polarization-resolved black phosphorus homojunction photodetector defined by ferroelectric domains. Nature Communications (2022). https://doi.org/10.1038/s41467-022-30951-y
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