Stretchable organic light-emitting diodes (SOLEDs) have been the challenging class of OLEDs as they have limited processability to fabricate a design that can withstand external deformation. Herein, we demonstrated the highly efficient top-emitting geometrical stretchable OLED (GSOLED) by incorporating the prestretched elastomer with optical adhesive film. The experimental and theoretical characterizations verified the enhancement of device efficiencies with the light extraction phenomenon brought by nanowavy corrugated structures. Furthermore, GSOLED shows stability in stretchable conditions and displays narrower emission spectrum with improved color purity. The full width at half maximum (FWHM) of 21 nm shows narrowband emission with a high current efficiency and EQE of 221 cd A⁻¹ and 39.50%. This work marks a significant step forward, providing unprecedented insights into the factors influencing device performance in current and future material systems for stretchable organic light-emitting diodes.

可拉伸有机发光二极管 (SOLED) 一直是具有挑战性的 OLED 类别，因为它们的加工性能有限，无法制造出能够承受外部变形的设计。在此，我们通过将预拉伸弹性体与光学粘合膜结合在一起，展示了高效的顶发射几何可拉伸OLED（GSOLED）。实验和理论表征验证了纳米波状波纹结构带来的光提取现象可以提高器件效率。此外，GSOLED 在可拉伸条件下表现出稳定性，并显示出更窄的发射光谱和更高的色纯度。 21 nm 的半峰全宽 (FWHM) 显示窄带发射，具有高电流效率和 EQE（221 cd A ^{- 1}和 39.50%）。这项工作标志着向前迈出的重要一步，为影响可拉伸有机发光二极管当前和未来材料系统中器件性能的因素提供了前所未有的见解。