Opt Lett. 2019 Jan 1;44(1):90-93. doi: 10.1364/OL.44.000090.
Although quantum dots (QDs) have a high quantum yield close to one in a solution, they exhibit low conversion efficiency in a solidification polymer matrix, which hampers the development of QD-based light-emitting diodes (LEDs) with high stability and optical performance. In this study, we proposed a methyl-terminated-polydimethylsiloxane-(PDMS)-based liquid-type packaging structure (LPS) to improve stability and optical performance of QD-based LEDs. Compared with the traditional ethylene-terminated-PDMS-based solid-type packaging structure, the LPS with an optimized kinematic viscosity of 10000 m/s can provide higher stability and optical performances for QD-based LEDs, including total radiant power and luminous flux. Consequently, the proposed effective and simple strategy has great potential for illumination and display applications.
虽然量子点 (QD) 在溶液中的量子产率接近 1，但它们在固化聚合物基质中的转化效率较低，这阻碍了具有高稳定性和光学性能的基于 QD 的发光二极管 (LED) 的发展。在这项研究中，我们提出了一种基于甲基封端聚二甲基硅氧烷 (PDMS) 的液体型封装结构 (LPS)，以提高基于 QD 的 LED 的稳定性和光学性能。与传统的乙烯封端 PDMS 基固态封装结构相比，具有优化运动粘度为 10000 m/s 的 LPS 可为基于 QD 的 LED 提供更高的稳定性和光学性能，包括总辐射功率和光通量。因此，所提出的有效且简单的策略在照明和显示应用中具有很大的潜力。
