众所周知, 柔性信息显示将在未来的光电应用中发挥重要作用。然而, 由于电极材料和柔性衬底的选择有限, 制备高效、稳定的柔性发光二极管仍然存在巨大的挑战。以光聚合物作为柔性衬底、CsPbBr3量子点作为发光层, 成功地制备了柔性钙钛矿发光二极管。为了改善电子的注入和传输, 采用Ag作阴极。结果表明, 高柔性的钙钛矿发光二极管的最高亮度为10 325 cd/m2且具有高色纯度(FWHM=19 nm)。此外, 制备的钙钛矿发光二极管具有良好的柔性和机械延展性。在大约180°的弯曲角度下反复弯曲100次后, 仍然保持着良好的器件性能。该研究为未来柔性显示器的应用奠定了研究基础。

Flexible information displays have the promising potential for the future optoelectronic application. However, achieving the highly efficient and stable flexible light-emitting diodes (LEDs) is still a big challenge due to the limited choices of electrode materials and flexible substrates. Herein, the flexible perovskite light-emitting diodes (Pe-LEDs) by combining the flexible substrate based on a photopolymer with the CsPbBr3 quantum dots (QDs) emitting layer were fabricated. In order to improve electrons injection and transport, Ag was used as the cathode. As a result, the green light emitting Pe-LEDs with high luminance of 10 325 cd·m-2 and high color purity with the full-width-at-half-maximum (FWHM) of 19 nm were obtained. In addition, the Pe-LEDs exhibit good flexibility and mechanical ductility, and the as-prepared flexible device still maintains its optoelectronic performance even after repeated bending 100 cycles under a bending angle of about 180°. The research presents a further step toward the future application of flexible displays.