DataVXAdvanced MaterialsPaper
journal article·2019-10

Fast Photoelectric Conversion in the Near‐Infrared Enabled by Plasmon‐Induced Hot‐Electron Transfer

Yuanfang Yu, Yue Sun, Zhenliang Hu, Xuhong An, Dongming Zhou, Hongzhi Zhou, Wenhui Wang, Kaiyang Liu, Jie Jiang, Dandan Yang, Zainab Zafar, Haibo Zeng, Fengqiu Wang, Haiming Zhu, Junpeng Lu, Zhenhua Ni

Advanced Materials· Volume 31· Issue 43
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Source abstract

Abstract

Abstract Interfacial charge transfer is a fundamental and crucial process in photoelectric conversion. If charge transfer is not fast enough, carrier harvesting can compromise with competitive relaxation pathways, e.g., cooling, trapping, and recombination. Some of these processes can strongly affect the speed and efficiency of photoelectric conversion. In this work, it is elaborated that plasmon‐induced hot‐electron transfer (HET) from tungsten suboxide to graphene is a sufficiently fast process to prevent carrier cooling and trapping processes. A fast near‐infrared detector empowered by HET is demonstrated, and the response time is three orders of magnitude faster than that based on common band‐edge electron transfer. Moreover, HET can overcome the spectral limit of the bandgap of tungsten suboxide (≈2.8 eV) to extent the photoresponse to the communication band of 1550 nm (≈0.8 eV). These results indicate that plasmon‐induced HET is a new strategy for implementation of efficient and high‐speed photoelectric devices.
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Research context

Nanomaterials

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Ga2O3 and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Physics and Key Laboratory of MEMS of the Ministry of Education Southeast University Nanjing 211189 China

School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China

Center for Advanced 2D Materials and Graphene Research Center National University of Singapore 6 Science Drive 2 Singapore 117546 Singapore

Centre for Chemistry of High‐Performance & Novel Materials Department of Chemistry Zhejiang University Hangzhou 310027 China

Institute of Optoelectronics and Nanomaterials College of Materials Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China

Funding

National Basic Research Program of China · National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities

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