Zhang Yi, Yoo Jae-In, Kim Hyo-Bin, Kim Kang-Hoon, Kang Sung-Cheon, Choi Eun-Young, Parani Sundararajan, Song Jang-Kun
Department of Electrical and Computer Engineering, Sungkyunkwan University, Jangan-Gu, Suwon, Gyeonggi-do 16419, South Korea.
Department of Display Convergence Engineering, Sungkyunkwan University, Jangan-Gu, Suwon, Gyeonggi-do 16419, South Korea.
J Colloid Interface Sci. 2023 Nov;649:132-139. doi: 10.1016/j.jcis.2023.06.093. Epub 2023 Jun 17.
Quantum-dot (QDs) polymer composite films, which are key components in recent display applications, require improved photoluminescence (PL) intensity and color conversion efficiency for better display quality and low power consumption. In this study, we developed a novel approach to improve the photoluminescence (PL) of quantum dot (QDs)-polymer nanocomposite films. This was achieved by incorporating CO micropores and scattering particles into QD-embedded photopolymerizable polymer films. CO micropores were generated by the decomposition of KHCO in the film. The CO micropores, along with the partially decomposed KHCO microparticles, act as a scattering medium that increases the photon absorbance and improves the PL intensity. The effect of KHCO annealing temperature on various optical properties is investigated, and it is found that a large number of uniform micropores are created in the film at an optimal temperature, 110 ℃. Compared to an ordinary QD-polymer film, the PL of the QD-hybrid-foamed polymer film increases by 4.2 times. This method is fast and economically efficient, and provides insights into the design of high-performance optoelectronic devices.
量子点（QD）聚合物复合薄膜是近期显示应用中的关键组件，为了实现更好的显示质量和低功耗，需要提高其光致发光（PL）强度和颜色转换效率。在本研究中，我们开发了一种新颖的方法来提高量子点（QD）-聚合物纳米复合薄膜的光致发光（PL）性能。这是通过将CO微孔和散射颗粒引入嵌入量子点的可光聚合聚合物薄膜中来实现的。薄膜中的KHCO分解产生了CO微孔。这些CO微孔与部分分解的KHCO微粒一起，作为一种散射介质，增加了光子吸收率并提高了PL强度。研究了KHCO退火温度对各种光学性能的影响，发现在110℃的最佳温度下，薄膜中会产生大量均匀的微孔。与普通的量子点-聚合物薄膜相比，量子点混合发泡聚合物薄膜的PL提高了4.2倍。该方法快速且经济高效，为高性能光电器件的设计提供了思路。
