Enhanced photothermoelectric conversion in self-rolled tellurium photodetector with geometry-induced energy localization

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国家科技期刊平台
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外文摘要：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 higher 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 VW-1 and a large detectivity of 1.48 x 1011 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.

作者：

Jiayuan Huang、Chunyu You、Binmin Wu、Yunqi Wang、Ziyu Zhang、Xinyu Zhang、Chang Liu、Ningge Huang、Zhi Zheng、Tingqi Wu、Suwit Kiravittaya、Yongfeng Mei、Gaoshan Huang

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作者单位：

Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymers,Fudan University,Shanghai 200438,China

Yiwu Research Institute of Fudan University,Yiwu 322000 Zhejiang,China

International Institute of Intelligent Nanorobots and Nanosystems,Fudan University,Shanghai 200438,China

ShanghaiTech Quantum Device Lab,ShanghaiTech University,Shanghai 200120,China

Department of Electrical Engineering,Faculty of Engineering,Chulalongkorn University,Bangkok,Thailand

Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception,Institute of Optoelectronics,Fudan University,Shanghai 200438,China

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基金：

National Key Technologies R&D Program of ChinaNational Key Technologies R&D Program of ChinaNational Natural Science Foundation of ChinaScience and Technology Commission of Shanghai MunicipalityFudan Nanofabrication Laboratory,ShanghaiTech Quantum Device Lab,and ShanghaiTech Soft Matter Nanofab

项目编号：

2021YFA07153022021YFE01918006237505422ZR1405000SMN180827

出版年：

2024

DOI：

10.1038/s41377-024-01496-0

光:科学与应用(英文版)

中国科学院长春光学精密机械与物理研究所

光:科学与应用(英文版)

CSTPCD

ISSN：2095-5545

年,卷(期)：2024.13(8)