Preparation of heterostructure quantum dots towards wide-colour-gamut display

[Display omitted] •A moderate method of synthesizing CsPbBr3-xIx/ZnSe heterostructures.•The formation of heterostructure improves the stability of CsPbBr3-xIx PQDs.•The heterostructures are used in display backlight with wide colour gamut up to 125%. Perovskite quantum dots (PQDs) have excellent opt...

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Bibliographic Details
Published in:Materials letters 2019-11, Vol.254, p.171-174
Main Authors: Cheng, Rui, Shen, Haixia, Chen, Zhangchi, Li, Fucheng, Li, Ge, Wang, Cai-Feng, Chen, Su
Format: Article
Language:English
Subjects:
Color
Display
Electrons
Emissivity
Heterostructure
Heterostructures
Luminescence
Materials science
Nanoparticles
Optical properties
Perovskites
Photoelectricity
Photoluminescence
PL stability
Quantum dots
Stability
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Summary:[Display omitted] •A moderate method of synthesizing CsPbBr3-xIx/ZnSe heterostructures.•The formation of heterostructure improves the stability of CsPbBr3-xIx PQDs.•The heterostructures are used in display backlight with wide colour gamut up to 125%. Perovskite quantum dots (PQDs) have excellent optical properties such as high photoluminescence quantum yield (PL QY) and high colour purity, and thus show promising application prospects in photoelectric devices. However, the poor stability of PQDs (especially red-emissive PQDs) greatly limits their applications. Herein, we synthesized CsPbBr3-xIx/ZnSe heterostructures via in-situ formation of ZnSe QDs in the red-emissive CsPbBr3-xIx PQDs, which maintains the high PL QY (∼70%) but greatly enhances the stability of PQDs. Subsequently, we utilized the red-emissive CsPbBr3-xIx/ZnSe heterostructures and green-emissive CsPbBr3 PQDs as the light conversion materials to fabricate a QD film, which was then applied in backlight display with ultra-wide colour gamut up to NTSC 125%.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2019.07.021