光强可调的变温荧光测试系统在准二维钙钛矿中的应用

doi:10.3969/j.issn.1007-5461.2021.04.003

量子电子学报 ›› 2021, Vol. 38 ›› Issue (4): 420-427.doi: 10.3969/j.issn.1007-5461.2021.04.003

光强可调的变温荧光测试系统在准二维钙钛矿中的应用

张博, 郭秀文, 崔明焕, 孙铭泽, 李高强, 周静, 秦朝朝∗

( 河南师范大学物理学院, 河南省红外材料与光谱测量应用重点实验室, 河南新乡 453007 )

收稿日期:2020-06-24 修回日期:2020-07-22 出版日期:2021-07-28 发布日期:2021-07-27
通讯作者: E-mail: 1358064212@qq.com E-mail:qinch@hotmail.com
作者简介:张博( 1997 - ), 女, 河南三门峡人, 主要从事稳态荧光光谱方面的研究。 E-mail: 1358064212@qq.com
基金资助:
国家自然科学基金;河南省科技攻关研究项目;河南省教育厅重点项目

Application of variable temperature fluorescence test system with adjustable pump intensity in quasi-2D perovskite materials

ZHANG Bo, GUO Xiuwen, CUI Minghuan, SUN Mingze, LI Gaoqiang, ZHOU Jing, QIN Chaochao∗

( Henan Key Laboratory of Infrared Materials & Spectrum Measures and Applications, College of Physics, Henan Normal University, Xinxiang 453007, China )

Received:2020-06-24 Revised:2020-07-22 Published:2021-07-28 Online:2021-07-27
Supported by:
National Natural Science Foundation of China;Henan Science and Technology Research Project;Henan Provincial Department of Education Key Project

摘要/Abstract

摘要： 激子性质对准二维钙钛矿材料的发光机理具有决定性影响。测量激子-声子耦合强度和激子结合能是研究准二维钙钛矿材料激子特性的有力手段, 可以为揭示其内部光发射机制和进一步提高荧光量子产率提供关键的科学依据。将变光强荧光测试系统和液氮恒温装置相结合, 利用 LABVIEW 程序进行系统控制, 搭建了一套光强可调的变温荧光测试系统, 并以准二维钙钛矿薄膜样品为研究对象, 开展了对准二维钙钛矿的激子及其发光性质的研究。研究结果表明: 随着准二维钙钛矿材料 ⟨n⟩ 值的增加, 激子-纵向光学声子耦合强度和激子结合能均逐渐降低。此外, 利用该测试系统进行了室温下变光强荧光测量, 探究了准二维钙钛矿薄膜的光学增益, 得到其放大的自发辐射阈值为 3.2 µJ/cm2。

关键词: 光谱学, 激子性质, 变温荧光, 准二维钙钛矿, 放大的自发辐射

Abstract: Exciton properties have a decisive influence in the luminescence mechanism of quasi-2D per- ovskite material. Measurement of exciton-phonon coupling strength and exciton binding energy is a pow- erful means of investigating exciton properties of quasi-two-dimensional perovskite materials, which can provide a key scientific basis for revealing the internal light emission mechanism and further improving the fluorescence quantum yield. By combining the adjustable pump intensity fluorescence testing system with the liquid nitrogen thermostat, a set of variable temperature fluorescence test system with adjustable pump intensity is built and controlled by the LABVIEW program. Then the exciton and luminescence properties of quasi two-dimensional perovskite film samples are studied by using the built system. Theexperimental results show that the exciton-longitudinal optical phonon coupling strength and exciton binding energy decrease with the increase of ⟨n⟩-value of quasi-two-dimensional perovskite. In addition, by measuring the adjustable pump intensity fluorescence at room temperature with the built system, the optical gain of quasi-two-dimensional perovskite films is explored, and it is shown that the amplified threshold of spontaneous emission of the film is 3.2 µJ/cm2.

Key words: spectroscopy, exciton properties, variable temperature fluorescence, quasi-2D perovskite; amplified spontaneous emission

中图分类号:

O433.1

张博, 郭秀文, 崔明焕, 孙铭泽, 李高强, 周静, 秦朝朝∗. 光强可调的变温荧光测试系统在准二维钙钛矿中的应用[J]. 量子电子学报, 2021, 38(4): 420-427.

ZHANG Bo, GUO Xiuwen, CUI Minghuan, SUN Mingze, LI Gaoqiang, ZHOU Jing, QIN Chaochao∗. Application of variable temperature fluorescence test system with adjustable pump intensity in quasi-2D perovskite materials[J]. Chinese Journal of Quantum Electronics, 2021, 38(4): 420-427.

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光强可调的变温荧光测试系统在准二维钙钛矿中的应用

Application of variable temperature fluorescence test system with adjustable pump intensity in quasi-2D perovskite materials

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