https://scholars.lib.ntu.edu.tw/handle/123456789/633848
Title: | Omnidirectional and Highly Sensitive Microtubular Photodetectors Based on QD/2D Heterojunctions | Authors: | Ghosh, Rapti Kang, Yi Sun Yadav, Kanchan Lin, Hung I. Yen, Zhi Long Lin, Hsia Yu Lu, Guan Zhang Sankar, Raman Hsieh, Ya Ping Mario Hofmann YANG-FANG CHEN |
Keywords: | 2D-0D | flexible | graphene | omnidirectional | photodetector | ReS QD 2 | tubular | Issue Date: | 22-Nov-2022 | Journal Volume: | 4 | Journal Issue: | 11 | Source: | ACS Applied Electronic Materials | Abstract: | Roll-up technology provides a feasible approach to transform patterned planar membranes into three-dimensional (3D) tubular microstructures. The tubular geometry enables the confinement of the local electromagnetic field and strengthens the photon-matter interaction inside the structure. By applying the roll-up method, we fabricated 3D tubular photodetectors from graphene/quantum dots (QDs) embedded polymer membranes around an optical fiber. These fabricated tubular photodetectors exhibit 5 times higher photoresponsivity compared to their planar counterparts. The enhanced responsivity is related to the light-trapping effect of the tubular structure as verified by the finite-difference time-domain (FDTD) simulation. 3D tubular photodetectors can detect photons accurately over a wide incidence angle (0-360°) without the responsivity decline. This unprecedented feature suppresses all published reports and lifts the restriction of the limited measured angle in conventional photodetectors. The omnidirectional and highly sensitive tubular QDs/2D-based devices, opening a route toward future optoelectronic devices from imaging to tracking solar cells. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/633848 | ISSN: | 2637-6113 | DOI: | 10.1021/acsaelm.2c00871 |
Appears in Collections: | 物理學系 |
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