Waldron Dennis L, Burke Rebeckah, Preske Amanda, Krauss Todd D, Zawodny Joseph M, Gupta Mool C
Appl Opt. 2017 Mar 1;56(7):1982-1989. doi: 10.1364/AO.56.001982.
The optical properties of PbSe quantum dots (QDs) in AB9093 epoxy nanocomposite are examined with respect to temperature over a range of 0°C-80°C, a useful working range for many QD-based sensors and devices, and results are compared to QDs in toluene solution. A complete characterization of QD optical properties is provided as a function of temperature, including the absorption spectrum, first excitonic (1-s) absorption peak intensity and wavelength, fluorescence intensity, and peak wavelength. QD optical properties in toluene were found to be more sensitive to temperature as compared to those in AB9093. Interestingly, 1-s and fluorescence peak wavelength variation with temperature are reversed in AB9093 as compared to those in toluene solution. Results for the fluorescence properties of Lumogen F Red 305 dye in toluene are presented for comparison. The dye was found to have similar sensitivity to temperature to that of the QDs in terms of fluorescence peak wavelength shift, but the fluorescence peak intensity was far less variant. These results can be used to build a temperature sensor or as a guide to building other types of QD-based devices to be more robust against changes in ambient temperature.
研究了PbSe量子点（QD）在AB9093环氧纳米复合材料中的光学性质随温度在0°C至80°C范围内的变化情况，这是许多基于量子点的传感器和器件的有用工作范围，并将结果与甲苯溶液中的量子点进行了比较。给出了量子点光学性质随温度变化的完整表征，包括吸收光谱、第一激子（1-s）吸收峰强度和波长、荧光强度以及峰值波长。发现与AB9093中的量子点相比，甲苯中的量子点对温度更敏感。有趣的是，与甲苯溶液中的情况相比，AB9093中1-s和荧光峰值波长随温度的变化是相反的。给出了Lumogen F Red 305染料在甲苯中的荧光性质结果以作比较。发现该染料在荧光峰值波长偏移方面对温度的敏感度与量子点相似，但荧光峰值强度的变化要小得多。这些结果可用于构建温度传感器，或作为构建其他类型更能抵御环境温度变化的基于量子点的器件的指南。
