Haiyue Pei
(Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou 310024, Zhejiang Province, China)
This study presents a quantum dot (QD) fluorescence spectroscopy platform for full-temperature-range testing, based on a micro-machined Joule-Thomson (JT) cooler. Full-temperature-range testing is essential for evaluating QD fluorescence materials in different temperature applications, as temperature can affect their luminescence efficiency and spectrum. The study focuses on graphene QDs (initially attempted with pure anisole) and combines a Raman spectrometer with a low-temperature optical testing platform. The testing platform includes a small vacuum chamber with a JT cooling chip, whose evaporator section connects to a 1 cm² silicon wafer as a cold stage for optical testing. During the test, the sample's fluorescence intensity and spectrum are measured in the temperature range of 77K-473K. The paper details the design and construction of the system and verifies its testing performance for QD fluorescence spectra at different temperatures through experiments. The results show that the platform has excellent performance and reliability and can be widely applied in the research and application of QD fluorescence materials.
Haiyue Pei
(Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou 310024, Zhejiang Province, China)
Yihan Lu
(Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou 310024, Zhejiang Province, China)
Limin Qi
(Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou 310024, Zhejiang Province, China)
Dongli Liu
(Westlake Instruments (Hangzhou) Technology Co., Ltd, Hangzhou 310024, Zhejiang Province, China)
Ding Zhao
(Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou 310024, Zhejiang Province, China)
Prof.
Min Qiu
(Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou 310024, Zhejiang Province, China)
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