基于CsPbBr3钙钛矿量子点的高柔性绿光发光二极管

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10325 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。

Highly Flexible Green Light-emitting Diode Based on CsPbBr3 Perovskite Quantum Dots

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 10325 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.