journal article·2022-11-09

Epitaxial Perovskite Single-Crystalline Heterojunctions for Filter-Free Ultra-Narrowband Detection with Tunable Spectral Responses

Yuzhu Pan, Xin Wang, Yuhan Liao, Yubing Xu, Yuwei Li, Qing Li, Xiaobing Zhang, Jing Chen, Zhuoya Zhu, Zhiwei Zhao, Elias Emeka Elemike, Mamoru Furuta, Wei Lei

ACS Applied Materials & Interfaces· Volume 14· Issue 44
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Abstract

Narrowband photodetectors (NPDs) with the capability of detecting light within a selective wavelength range are in high demand for numerous emerging applications such as imaging systems, machine vision, and optical communication. Halide perovskite materials have been developed for eliminating the current complex filtering systems in NPDs due to their beneficial properties, while currently NPDs using perovskite materials are limited by hardly fully eliminated short wavelength response, low charge collection efficiency (CCE), complex fabrication process, and so forth. Herein, a series of perovskite single-crystalline heterojunctions (PSCHs) with a structure of Bi-MAPbX3/MAPbY3 are fabricated by liquid phase epitaxy for filter-free narrowband detection. By varying the halide component in the PSCH, the PSCH-based NPDs can realize continuously tunable spectral response range from blue to NIR regions and ultra-narrow full width at half-maximum (FWHM) of <20 nm. Specifically, the PSCH-based NPD with a high CCE under a large electric filed shows a high spectra rejection ratio of >1000, a fast response speed with rise/fall time of ∼160/∼225 μs, and long-term stability more than 3 months in ambient air. This work provides a simple strategy for designing low-cost and high-performance filter-free NPDs with a tunable spectral response.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Ga2O3 and related materials · Photoacoustic and Ultrasonic Imaging

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

Affiliations

State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment, China Nuclear Power Engineering Co. Ltd., Shenzhen, Guangdong518045, China

School of Electronic Science and Engineering, Joint International Research Laboratory of Information Display and Visualization, Southeast University, Nanjing210096, China

Department of Chemistry, School of Physical and Chemical Sciences, Faculty of Natural and Agricultural Sciences, North-West University, Mafikeng, Private Bag X2046, Mmabatho2735, South Africa

Department of Environmental Science and Engineering, Kochi University of Technology, Kami, Kochi782-8502, Japan

Funding

Ministry of Science and Technology of the People's Republic of China · Basic Research Program of Jiangsu Province · National Natural Science Foundation of China · Higher Education Discipline Innovation Project · Leading Technology of Jiangsu Basic Research Plan · Research Fund for International Young Scientists · Postgraduate Research & Practice Innovation Program of Jiangsu Province · State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment

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