However, there are still two key problems remaining within the PeLEDs for their further development, namely the light extraction problem and the short lifetime problem. Therefore, in this report, we will discuss our recent work targeting addressing the above two critical problems.
First, our work on improving the light extraction efficiency by deploying the nanophotonic substrates will be introduced. Second, the improvement of the device’s operational lifetime at high luminance conditions with perovskite nanowires embedded in a porous alumina template will be discussed. Third, a full evaporation method that is compatible with industrialization will be shown. Last but not least, our endeavors on the displays based on perovskite materials will be covered.
References
[1] Q. Zhang, M. M. Tavakoli, L. Gu, D. Zhang, L. Tang, Y. Gao, J. Guo, Y. Lin, S. -F. Leung, S. Poddar, Y. Fu, Z. Fan, "Efficient metal halide perovskite light-emitting diodes with significantly improved light extraction on nanophotonic substrates," Nature Communications, 10 (1), 727 (2019).
[2] Q. Zhang, D. Zhang, L. Gu, S. Poddar, Y. Fu, L. Shu, and Z. Fan, “Three-dimensional perovskite nanophotonic wire array-based light-emitting diodes with significantly improved efficiency and stability,” ACS Nano, 14 (2), 1577-1585 (2020).
[3] Y. Fu, Q. Zhang, D. Zhang, Y. Tang, L. Shu, Y. Zhu, and Z. Fan, “Scalable All-evaporation Fabrication of Efficient Light-Emitting Diodes with Hybrid 2D-3D Perovskite Nanostructures,” Advanced Functional Materials, 30, 2002913 (2020).
[4] D. Zhang, Q. Zhang, B. Ren, Y. Zhu, M. Abdellah, Y. Fu, B. Cao, C. Wang, L. Gu, Y. Ding, K.-H. Tsui, S. Fan, S. Poddar, L. Shu, Y. Zhang, D.-B. Kuang, J.-F. Liao, Y. Lu, K. Zheng, Z. He, Z. Fan, “Large-scale Planar and Spherical Light-emitting Diodes Based on Arrays of Perovskite Quantum Wires”, Nature Photonics, 19, 284-290 (2022).