微秒－毫秒尺度真空紫外时间分辨荧光实验技术研究

Luminescent materials excited by vacuum ultraviolet light play an important role in plasma display panels and Hg-free fluorescent lamps. Luminescent VUV spectroscopy is necessary in studying energy absorption, transmission and emission of materials. Time-resolved luminescent spectroscopy could give more information than steady-state spectroscopy. It is useful in studying dynamical mechanism. Potential energy curve, vibrational relaxation, energy transmission and origin of luminescence could be analyzed via time-resolved luminescent spectroscopy. Developing new luminescent materials used in 3D display and other fields need time-resolved luminescent experiment in region microsecond to millisecond, but some technical reasons and lack of suitable light source make it unable in domestic with current conditions. Based on 4B8 VUV Station in BSRF, this project will focus on technology development of time-resolved experiment about luminescent materials under VUV excitation. With the help of a high speed chopper used to make suitable pulses, test of time-resolved luminescent spectroscopy in region microsecond to millisecond will come to truth. It's a new method for researches on characters of luminescent materials and of great significance.

真空紫外（VUV)激发的发光材料在等离子平板显示器、无汞照明灯等的应用中有重要作用。真空紫外荧光光谱是研究VUV激发材料的能量吸收、传递和发射过程的必需的手段。时间分辨光谱可以提供比稳态光谱更多的信息，可以分析激发态的势能曲线、振动弛豫、能量传递和发光起源等，是研究动力学机制的有力工具。发展新荧光材料（如3D显示），需要微秒－毫秒范围的真空紫外时间分辨荧光光谱测试。由于光源及技术的原因，目前国内尚不能进行。本项目将依托于北京同步辐射装置（BSRF）4B8真空紫外实验站，开展真空紫外时间分辨实验相关技术的研究，利用高速运动的斩波器（chopper）获得所需脉宽的激发脉冲，实现微秒－毫秒尺度荧光寿命谱的测试，为材料发光特性研究提供新的实验手段。具有重要的研究意义。

国家自然科学基金“微秒－毫秒尺度真空紫外时间分辨荧光实验技术研究”依托于北京同步辐射装置（BSRF）4B8 真空紫外实验站，在现有稳态光谱系统基础上，开展真空紫外时间分辨实验相关技术的研究，为材料发光特性研究提供新的实验手段。利用设计加工的高速运动斩波器（chopper），可获得所需脉宽的激发脉冲，开展微秒－毫秒尺度荧光寿命谱的测试。