Wei Wenjun, Liu Cui, Liu Jiyan, Liu Xueqing, Zou Linling, Cai Shaojun, Shi Hong, Cao Yuan-Cheng
Key Laboratory of Optoelectronic Chemical Materials and Devices (Jianghan University), Ministry of Education, Wuhan, 430056, People's Republic of China.
Flexible Display Materials and Technology Co-Innovation Centre of Hubei Province, Jianghan University, Wuhan, 430056, China.
Luminescence. 2016 Jun;31(4):1020-4. doi: 10.1002/bio.3068. Epub 2015 Dec 14.
This paper studied the effects of cations and polymer matrix on the fluorescent properties of quantum dots (QDs). The results indicated that temperature has a greater impact on fluorescence intensity than clay cations (mainly K(+) and Na(+) ). Combined fluorescence lifetime and steady-state spectrometer tests showed that QD lifetimes all decreased when the cation concentration was increased, but the quantum yields were steady at various cation concentrations of 0, 0.05, 0.5 and 1 M. Poly(ethylene oxide) (PEO), poly(vinyl alcohol) (PVA) and diepoxy resin were used to study the effects of polymers on QD lifetime and quantum yield. The results showed that the lifetime for QDs 550 nm in PEO and PVA was 17.33 and 17.12 ns, respectively; for the epoxy resin, the lifetime was 0.74 ns, a sharp decrease from 24.47 ns. The quantum yield for QDs 550 nm changed from 34.22% to 7.45% and 7.81% in PEO and PVA, respectively; for the epoxy resin the quantum yield was 2.25%. QDs 580 nm and 620 nm showed the same results as QDs 550 nm. This study provides useful information on the design, synthesis and application of QDs-polymer luminescent materials. Copyright © 2015 John Wiley & Sons, Ltd.
本文研究了阳离子和聚合物基质对量子点（QDs）荧光性质的影响。结果表明，温度对荧光强度的影响大于粘土阳离子（主要是K⁺和Na⁺）。荧光寿命和稳态光谱仪联合测试表明，当阳离子浓度增加时，量子点的寿命均降低，但在0、0.05、0.5和1 M的各种阳离子浓度下，量子产率保持稳定。使用聚环氧乙烷（PEO）、聚乙烯醇（PVA）和双环氧树脂研究了聚合物对量子点寿命和量子产率的影响。结果表明，550 nm量子点在PEO和PVA中的寿命分别为17.33和17.12 ns；对于环氧树脂，寿命为0.74 ns，从24.47 ns急剧下降。550 nm量子点在PEO和PVA中的量子产率分别从34.22%变为7.45%和7.81%；对于环氧树脂，量子产率为2.25%。580 nm和620 nm的量子点显示出与550 nm量子点相同的结果。本研究为量子点-聚合物发光材料的设计、合成和应用提供了有用信息。版权所有© 2015约翰威立父子有限公司。
