Acquisition of a Luminescence Micro-Spectrometer

9302158 Tanner这种发光微光谱仪将能够在发光材料的微观尺寸区域上进行光致发光（PL）或电致发光（EL）光谱的测量。该仪器由一个高质量的光学显微镜、两个单色器、光源和探测器组成。单色仪可以测量被研究样品发出的光谱——小到一微米大小——可以在240-800纳米范围内。样品由第二单色器照射，照射波长在相同的240-800 nm范围内独立可调。因此，通过固定照明波长，该仪器可用于光致发光光谱，通过阻挡照射器并将EL样品连接到电压源，用于电致发光光谱，以及通过一起扫描单色器或绕过其中一个单色器进行透射率和反射率研究。该设备将用于凝聚态物理、高能物理和聚合物化学的几个研究项目。特别是，它将大大加强两个项目的研究发光性质的聚合物。其中一个项目是开发用于粒子探测器的抗辐射闪烁体。发光微光谱仪将用于表征染料掺杂聚合物纤维的光发射，监测空间分布的辐射诱导损伤，跟踪损伤的恢复，并研究掺杂材料的聚集和迁移性。第二个项目研究共轭聚合物的电致发光和光致发光。这些材料在EL显示设备中有应用。这里要求的光谱仪将用于测量这些材料的PL和EL光谱，包括表征聚合物取向对光谱的影响。因此，该仪器将有助于推动粒子探测器和发光装置发展的最新知识。＊＊＊

9302158 Tanner This luminescence microspectrometer will be capable of making measurements of either photoluminescence (PL) or electroluminescence (EL) spectra on microscopic size areas of luminescent materials. The instrument is built around a high- quality optical microscope combined with two monochromators, light sources, and detectors. One monochromator measures the spectrum of light emitted from the sample under study-as small a micrometer in size-can be over the 240-800 nm range. The sample is illuminated by means of the second monochromator, with the illumination wavelength independently adjustable over the same 240-800 nm range. Thus, the instrument may be used for photoluminescence spectroscopy by fixing the illumination wavelength, for electroluminescence spectroscopy by blocking the illuminator and connecting the EL sample to a voltage source, and for transmittance and reflectance studies by scanning the monochromators together or bypassing one of them. The equipment will be used in several research projects in condensed-matter physics, high-energy physics, and polymer chemistry. In particular, it will enhance substantially two projects for the study of luminescent properties of polymers. One project is developing radiation-hard scintillators for use in particle detectors. The luminescence micro-spectrometer will be used to characterize the emission of light from fibers of dye-doped polymers, to monitor spatially-distributed radiation-induced damage, to follow recovery of damage, and to investigate aggregation and mobility of the dopant materials. A second project studies the electroluminescence and photoluminescence in conjugated polymers. These materials have applications in EL display devices. The spectrometer requested here will be used for measuring the PL and EL spectra of these materials, including characterizing the effect of polymer orientation on the spectra. Thus, this instrument will contribute to advancing state-of-the- art knowledge in the development of particle detectors and light-emitting devices. ***