Development of Mixed-Cation CsxRb1–xPbX3 PerovskiternQuantum Dots and Their Full-Color Film with HighrnStability and Wide Color Gamut

摘要

Mixed-cation CsxRb1–xPbX3 (X = Cl, Br, I) perovskite quantum dots (PeQDs)nare developed and show high quantum yields of 93% and 86% for greennand blue wavelengths, respectively. The stability is significantly improvednunder heat, UV, and water aging conditions. These improved propertiesnare explained by the increased defect formation resistance and excitonnbinding energy with Rb incorporation. Perovskite films are fabricated usingnCsxRb1–xPbX3 PeQDs and cyclic olefin copolymer. The films have a wide colorngamut covering up to 104.15% of the BT.2020-defined color space, with thenwhite light color coordinates of (0.33, 0.32), luminance of 68.86 Cd m−2, andncorrelated color temperature of 5299 K at 20 mA.