Doping manganese into CsPb(Cl/Br)3 quantum dots glasses: Dual‐color emission and super thermal stability. Issue 3 (30th July 2018)

• Record Type: Journal Article
• Authors: He, Meiling; Cheng, Yinzi; Shen, Linli; Zhang, Huiling; Shen, Chenyang; Xiang, Weidong; Liang, Xiaojuan
• Is Part Of: Journal of the American Ceramic Society. Volume 102:Issue 3(2019)
• Page Start: 1090
• Page End: 1100
• Publication Date: 2018-07-30
• Subjects: Ce3+:YAG phosphor‐in‐glass -- Mn‐doped CsPb(Cl/Br)3 QD glasses -- perovskite stability -- warm‐WLED; Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.15945
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: CsPbX3 ( X = Cl, Br, I) perovskite quantum dots (QDs) represent bright and tunable photoluminescence, it is regrettable that the air instability and poor water resistant properties prevent their application in optoelectronic devices. At the same time, the toxicity of lead is also a major factor restricting its development. As a consequence, we demonstrate the partial replacement of Pb with Mn through conventional melt‐quenching and heat‐treatment method preparation of Mn‐doped CsPb(Cl/Br)3 QD glass. Mn‐doped CsPb(Cl/Br)3 QD glass exhibits high luminescent intensity like QDs. It is important that Mn‐doped CsPb(Cl/Br)3 QD glass with Dual‐Color maintained the same lattice structure like Mn‐doped CsPb(Cl/Br)3 QDs, and highly homogeneous spectral characteristics of Mn luminescence. The intensity and position of this Mn‐related emission are also tunable by altering the experimental parameters, such as the Pb‐to‐Mn feed ratio, annealing temperature. More importantly, the as‐prepared orange Mn‐doped CsPb(Cl/Br)3 QD glass was employed to fabricate white LEDs combined with a commercial Ce 3+ :Y3 Al5 O12 phosphor‐in‐glass (Ce‐PiG) on top of a InGaN blue chip. And the constructed WLEDs generate a warm white with an optimal luminous efficacy (LE) of 67.00 lm/W, a high CRI of 81.4, and a low CCT of 4902 K.