荧光量子效率绝对测量方法研究

贾志立; 蒲成; 任玲玲

doi:10.12338/j.issn.2096-9015.2022.0190

荧光量子效率绝对测量方法研究

doi: 10.12338/j.issn.2096-9015.2022.0190

中国计量科学研究院，北京 100029

基金项目: 中国计量科学研究院基本科研业务费所自主项目（AKYZZ2038）；中国计量科学研究院基本科研业务费项目（AKYZZ2024）。

详细信息

作者简介:
贾志立（1982-），中国计量科学研究院副研究员，研究方向：新材料计量，邮箱：jiazl@nim.ac.cn

通讯作者:
任玲玲（1970-），中国计量科学研究院研究员，研究方向：新材料计量，邮箱：renll@nim.ac.cn

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出版历程
- 网络出版日期: 2022-09-05
- 刊出日期: 2022-09-30

Study on Absolute Measurement Method of Fluorescence Quantum Efficiency

National Institute of Metrology, Beijing 100029, China

摘要

摘要: 荧光量子效率是荧光材料发射的光子数与吸收的光子数之比，用于评价荧光材料的发光性能。针对在标准物质研制中用绝对法测量荧光量子效率存在的问题，本文研究了四通光比色皿宽波段配套一致性检验方法，消除了比色皿入射面透射比不一致对荧光量子效率测量的影响；研究了分段采谱的测量方法，消除了激发光对发射波段的影响，确保了发射波段积分的准确性；研究了比色皿中溶液蒸发对荧光量子效率的影响，对比色皿密封能够排除在荧光量子效率测量中因体积和浓度波动带来的影响。这些研究为荧光量子效率绝对法准确测量提供指导。
- 比色皿配套 /
- 荧光量子效率 /
- 绝对法 /
- 分段采谱 /
- 密封型比色皿
Abstract: Fluorescence quantum efficiency is the ratio of the number of photons emitted by fluorescent materials to the number of photons absorbed, which is used to evaluate the luminescence performance of fluorescent materials. In this paper, aiming at the problems of fluorescence quantum efficiency measurement by the absolute method in reference materials preparation, we studied the four-pass cuvette wide-band matching consistency test method, which eliminates the influence of inconsistent transmission ratio of cuvette incident surface on the measurement of fluorescence quantum efficiency. The measurement method of segmented spectrum acquisition was studied to eliminate the influence of excitation on the emission band and ensure the accuracy of emission band integration. The effect of solvent evaporation in the cuvette on fluorescence quantum efficiency was studied. The sealing of the cuvette can eliminate the influence of volume and concentration fluctuations in the measurement of fluorescence quantum efficiency. These studies provide guidance for the accurate measurement of fluorescence quantum efficiency by the absolute method.
- matching consistency of cuvette /
- fluorescence quantum efficiency /
- absolute method /
- segmented spectrum acquisition /
- sealed cuvette

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图 1 荧光量子效率绝对法测量系统示意图

Figure 1. Schematic diagram of fluorescence quantum efficiency absolute method measurement system

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图 2 四通光比色皿的配套一致性检验

Figure 2. Matching consistency measurement of four-pass cuvette

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图 3 比色皿透射比不同的入射面对激发光和发射光波段光谱的影响

Figure 3. Influence of incident plane with different transmittance of cuvettes on excitation and emission spectrum

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图 4 整体采集得到的光谱

Figure 4. Spectrum obtained by synchronous acquisition method

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图 5 通过分段采谱得到的激发光和发射光波段的光谱曲线

Figure 5. Excitation and emission spectrum obtained by segmented spectrum acquisition

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图 6 不同体积硫酸奎宁溶液和空白溶液的照片

Figure 6. Photographs of quinine sulfate solution and blank solution of different volumes

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图 7 不同体积的硫酸奎宁溶液的荧光量子效率

Figure 7. Fluorescence quantum efficiencies of quinine sulfate solutions with different volumes

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表 1 不同体积硫酸奎宁溶液的荧光量子效率

Table 1. Fluorescence quantum efficiency of different volumes of quinine sulfate solutions

体积（mL）荧光量子效率（%）

2.00 81.1
2.83 55.1
3.66 56.6

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表 2 比色皿密封后不同时间测得的硫酸奎宁溶液的荧光量子效率

Table 2. Fluorescence quantum efficiencies of quinine sulfate solution measured at different times after the cuvettes were sealed

时间（月）荧光量子效率（%）

0 56.0
9 55.7

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