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Strong Anisotropic Two-Dimensional In2Se3 for Light Intensity and Polarization Dual-Mode High-Performance Detection
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-01-04 , DOI: 10.1021/acsami.2c19660
Shaoyuan Wang 1 , Zhihao Yang 1 , Dong Wang 1 , Chao Tan 1 , Lei Yang 1 , Zegao Wang 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-01-04 , DOI: 10.1021/acsami.2c19660
Shaoyuan Wang 1 , Zhihao Yang 1 , Dong Wang 1 , Chao Tan 1 , Lei Yang 1 , Zegao Wang 1
Affiliation
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Detecting the light from different freedom is of great significance to gain more information. Two-dimensional (2D) materials with low intrinsic carrier concentration and highly tunable electronic structure have been considered as the promising candidate for future room-temperature multi-functional photodetectors. However, current investigations mainly focus on intensity-sensitive detection; the multi-dimensional photodetection such as polarization-sensitive photodetection is still in its early stage. Herein, the intensity- and polarization-sensitive photodetection based on α-In2Se3 is studied. By using angle-resolved polarized Raman spectroscopy, it is demonstrated that α-In2Se3 shows an anisotropic phonon vibration property indicating its asymmetric structure. The α-In2Se3-based photodetector has a photoelectric performance with a responsivity of 1936 A/W and a specific detectivity of 2.1 × 1013 Jones under 0.2 mW/cm2 power density at 400 nm. Moreover, by studying the polarized angle-resolved photoelectrical effect, it is found that the ratio of maximum and minimum photocurrent (dichroic ratio) reaches 1.47 at 650 nm suggesting good polarization-sensitive detection. After post-annealing, α-In2Se3 in situ converts to β-In2Se3 which has similar in-plane anisotropic crystallinity and exhibits a dichroic ratio of 1.41. It is found that the responsivity of β-In2Se3 is 6 A/W, much lower than that of α-In2Se3. The high-performance light intensity- and polarization-detection of α-In2Se3 enlarges the 2D anisotropic materials family and provides new opportunities for future dual-mode photodetection.
中文翻译：
用于光强度和偏振双模高性能检测的强各向异性二维 In2Se3
检测来自不同自由度的光对于获取更多信息具有重要意义。具有低本征载流子浓度和高度可调电子结构的二维 (2D) 材料被认为是未来室温多功能光电探测器的有前途的候选者。然而，目前的研究主要集中在强度敏感检测上；偏振敏感光电探测等多维光电探测仍处于早期阶段。在此，研究了基于α-In 2 Se 3的强度和偏振敏感光电探测。角分辨偏振拉曼光谱表明α-In 2 Se 3显示出各向异性的声子振动特性，表明其不对称结构。该α-In 2 Se 3基光电探测器在400 nm 、0.2 mW/cm 2功率密度下具有1936 A/W的响应度和2.1×10 13 Jones的比探测率。此外，通过研究偏振角分辨光电效应，发现最大和最小光电流之比（二色性比）在650 nm处达到1.47，表明具有良好的偏振敏感检测。后退火后，α-In 2 Se 3原位转化为 β-In 2 Se 3具有相似的面内各向异性结晶度，二向色比为 1.41。发现β-In 2 Se 3的响应度为6 A/W，远低于α-In 2 Se 3的响应度。α-In 2 Se 3的高性能光强度和偏振检测扩大了 2D 各向异性材料系列，并为未来的双模光电检测提供了新的机会。
更新日期：2023-01-04
中文翻译：
用于光强度和偏振双模高性能检测的强各向异性二维 In2Se3
检测来自不同自由度的光对于获取更多信息具有重要意义。具有低本征载流子浓度和高度可调电子结构的二维 (2D) 材料被认为是未来室温多功能光电探测器的有前途的候选者。然而，目前的研究主要集中在强度敏感检测上；偏振敏感光电探测等多维光电探测仍处于早期阶段。在此，研究了基于α-In 2 Se 3的强度和偏振敏感光电探测。角分辨偏振拉曼光谱表明α-In 2 Se 3显示出各向异性的声子振动特性，表明其不对称结构。该α-In 2 Se 3基光电探测器在400 nm 、0.2 mW/cm 2功率密度下具有1936 A/W的响应度和2.1×10 13 Jones的比探测率。此外，通过研究偏振角分辨光电效应，发现最大和最小光电流之比（二色性比）在650 nm处达到1.47，表明具有良好的偏振敏感检测。后退火后，α-In 2 Se 3原位转化为 β-In 2 Se 3具有相似的面内各向异性结晶度，二向色比为 1.41。发现β-In 2 Se 3的响应度为6 A/W，远低于α-In 2 Se 3的响应度。α-In 2 Se 3的高性能光强度和偏振检测扩大了 2D 各向异性材料系列，并为未来的双模光电检测提供了新的机会。
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