1.Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200438, China
2.Yiwu Research Institute of Fudan University, Yiwu 322000 Zhejiang, China
3.International Institute of Intelligent Nanorobots and Nanosystems, Fudan University, Shanghai 200438, China
4.ShanghaiTech Quantum Device Lab, ShanghaiTech University, Shanghai 200120, China
5.Department of Electrical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand
6.Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception, Institute of Optoelectronics, Fudan University, Shanghai 200438, China
Gaoshan Huang (gshuang@fudan.edu.cn)
Published:31 August 2024,
Published Online:04 July 2024,
Received:11 January 2024,
Revised:23 May 2024,
Accepted:26 May 2024
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Huang, J. Y. et al. Enhanced photothermoelectric conversion in self-rolled tellurium photodetector with geometry-induced energy localization. Light: Science & Applications, 13, 1545-1556 (2024).
Huang, J. Y. et al. Enhanced photothermoelectric conversion in self-rolled tellurium photodetector with geometry-induced energy localization. Light: Science & Applications, 13, 1545-1556 (2024). DOI: 10.1038/s41377-024-01496-0.
Photodetection has attracted significant attention for information transmission. While the implementation relies primarily on the photonic detectors
they are predominantly constrained by the intrinsic bandgap of active materials. On the other hand
photothermoelectric (PTE) detectors have garnered substantial research interest for their promising capabilities in broadband detection
owing to the self-driven photovoltages induced by the temperature differences. To get highe
r performances
it is crucial to localize light and heat energies for efficient conversion. However
there is limited research on the energy conversion in PTE detectors at micro/nano scale. In this study
we have achieved a two-order-of-magnitude enhancement in photovoltage responsivity in the self-rolled tubular tellurium (Te) photodetector with PTE effect. Under illumination
the tubular device demonstrates a maximum photovoltage responsivity of 252.13 V W
−1
and a large detectivity of 1.48 × 10
11
Jones
. We disclose the mechanism of the PTE conversion in the tubular structure with the assistance of theoretical simulation. In addition
the device exhibits excellent performances in wide-angle and polarization-dependent detection. This work presents an approach to remarkably improve the performance of photodetector by concentrating light and corresponding heat generated
and the proposed self-rolled devices thus hold remarkable promises for next-generation on-chip photodetection.
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