Yarn-based organic light-emitting devices (YOLEDs) have emerged as candidates for potential applications in electronic textiles and wearable electronics. However, the efficiency of YOLEDs is lower than that of conventional OLEDs based on glass substrates because of the loss of light in the interface between the yarn and the organic layers. This paper reports an enhanced out-coupling efficiency when Norland Optical Adhesive 63 (NOA63): Bathophenanthroline (Bphen) particles are used as an organic scattering layer (OSL) for applications in high-efficiency YOLEDs. The RMS roughness of the yarn/OSL/PEDOT:PSS structures (4.3 nm) is drastically reduced in comparison with that of yarn (19.7 nm). Furthermore, the transmittance intensities at 515 nm of yarn with and without an OSL containing Bphen particles are 87% and 82%, respectively, and the luminance of YOLEDs with Bphen particles in the OSL (194.1 cd/cm²) is 41.7 cd/cm² larger than that without Bphen particles (152.4 cd/cm²) due to the scattering of light from those particles. Moreover, at 515 nm, the electroluminescence (EL) intensity of YOLEDs with Bphen particles in the OSL is 1.3 times larger than that of the YOLEDs without the particles. This successful demonstration of enhanced luminescence and enhanced EL for YOLEDs based on an OSL containing Bphen particles indicates a potential for applications of YOLEDs in next-generation wearable display systems.

基于纱线的有机发光器件（YOLED）已成为电子纺织品和可穿戴电子产品潜在应用的候选者。然而，由于在纱线和有机层之间的界面中的光损失，YOLED的效率低于基于玻璃基板的常规OLED的效率。本文报道了使用Norland光学胶粘剂63（NOA63）：红菲咯啉（Bphen）颗粒作为有机散射层（OSL）用于高效YOLED时的增强的外耦合效率。与纱线（19.7 nm）相比，纱线/ OSL / PEDOT：PSS结构的RMS粗糙度（4.3 nm）大大降低。此外，有和没有含OSL的含Bphen颗粒的纱线在515 nm处的透射强度分别为87％和82％。²）由于没有来自Bphen粒子的散射（152.4 cd / cm ²），比那些没有Bphen粒子的散射大41.7 cd / cm ²。此外，在515 nm处，OSL中具有Bphen颗粒的YOLED的电致发光（EL）强度是不具有颗粒的YOLED的电致发光（EL）强度的1.3倍。基于包含Bphen颗粒的OSL的YOLED的增强发光和增强EL的成功演示表明，YOLED在下一代可穿戴显示系统中的应用潜力。