Liu, S., C. Zang, J. Zhang, S. Tian, Y. Wu, D. Shen, L. Zhang, W. Xie, and C. Lee. “Air-Stable Ultrabright Inverted Organic Light-Emitting Devices With Metal Ion-Chelated Polymer Injection Layer”. Nano-Micro Letters, vol. 14, Dec. 2021, p. 14, doi:10.1007/s40820-021-00745-w.