ess Enhanced photothermoelectric conversion in selfrolled tellurium photodetector with geometryinduced energy localization  

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 

机构地区：[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

出　　处：《Light(Science & Applications)》2024年第8期1545-1556,共12页光（科学与应用)（英文版）

基　　金：supported by the National Key Technologies R&D Program of China(Nos.2021YFA0715302 and 2021YFE0191800);the National Natural Science Foundation of China(No.62375054);the Science and Technology Commission of Shanghai Municipality(No.22ZR1405000);Fudan Nano-fabrication Laboratory,ShanghaiTech Quantum Device Lab,and ShanghaiTech Soft Matter Nanofab(No.SMN180827).

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 twoorder-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 1.48×10^(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.

关 键 词：ILLUMINATION energy primarily 

分 类 号：TN366[电子电信—物理电子学]