Aluminum-Doped Cesium Lead Bromide Perovskite Nanocrystals with Stable Blue Photoluminescence Used for Display Backlight.

ABSTRACT: Bright and stable blue emitters with narrow full-width at half-maxima are particularly desirable for applications in television displays and related technologies. Here, this study shows that doping aluminum (Al³⁺) ion into CsPbBr₃ nanocrystals (NCs) using AlBr₃ can afford lead-halide perovskites NCs with stable blue photoluminescence. First, theoretical and experimental analyses reveal that the extended band gap and quantum confinement effect of elongated shape give rise to the desirable blueshifted emission. Second, the aluminum ion incorporation path is rationalized qualitatively by invoking fundamental considerations about binding relations in AlBr₃ and its dimer. Finally, the absence of anion-exchange effect is corroborated when green CsPbBr<

SUBMITTER: Liu M 

PROVIDER: S-EPMC5700652 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature