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柔性LED是近年来照明及显示领域研究的热点之一。本文提出了一种新的基于有机硅胶(PDMS)制备的兼具超弹性和柔性的荧光薄膜,它不仅在-50~230℃这一较宽的温度范围内展现了良好的热稳定性,还保持了原料荧光粉的光学性能。所制备的透明PDMS基质膜和相应的荧光膜具有完全的柔性和超弹性,其最大伸长率分别高达400%与275%。此外,采用所制掺YAG荧光膜和普通商用1 W蓝光芯片简单封装的白光LED灯珠满足日常白光照明的应用要求,呈现出约6 925 K的平均色温,约71的平均显色指数,115.7 lm/W左右的平均发光效率。最后,基于所提出荧光膜成膜工艺而制备的三色3×3柔性阵列显示,可以轻易被拉伸、卷曲和折叠,显示了它在柔性照明及显示器件方面具有应用价值和潜力。
Flexible LED is one of the hot spots in the field of lighting and display in recent years. In this paper, we propose a new super-flexible and flexible fluorescent film based on organosilicone gel (PDMS), which not only shows good thermal stability in the wide temperature range of -50 ~ 230 ℃, but also Maintained the optical properties of raw phosphor. The prepared transparent PDMS matrix film and the corresponding fluorescent film have complete flexibility and super elasticity, and the maximum elongation is up to 400% and 275% respectively. In addition, the white LED lamp with YAG fluorescent film and ordinary commercial 1 W blue chip simple package meet the application requirements of daily white light illumination, showing an average color temperature of about 6 925 K, an average color rendering index of about 71, 115.7 lm / W about the average luminous efficiency. Finally, a three-color, 3x3 flexible array fabricated on the basis of the proposed film-forming process of the fluorescent film shows that it can be easily stretched, curled and folded, showing its potential for application in flexible lighting and display devices.