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Photoluminescence Enhancement of Perovskite CsPbBr3 Quantum Dots by Plasmonic Au Nanorods
摘要： Plasmonic Au nanorods/CsPbBr3 quantum dots film has been prepared via spin-coating. It is found that photoluminescence intensity of Au nanorods/CsPbBr3 quantum dots film exhibits 2-fold enhancement compared with pristine CsPbBr3 quantum dots film. Time-resolved photoluminescence decay curves show that the lifetime of CsPbBr3 quantum dots film decreases from 6.15 ns to 4.78 ns after combining with Au nanorods. The finite-difference time-domain simulation indicates that Au nanorods arouse a localized surface plasmon resonance around 500 nm, which enhances the emission intensity of CsPbBr3 quantum dots film.
关键词： CsPbBr3 Quantum Dot,Photoluminescence,Local Surface Plasmon Resonance,Au Nanorods
更新于2025-09-12 10:27:22
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High-Quality All-Inorganic Perovskite CsPbBr3 Quantum Dots Emitter Prepared by a Simple Purified Method and Applications of Light-Emitting Diodes
摘要： High-quality perovskite CsPbBr3 quantum dots (QDs-CsPbBr3) were prepared using the ultrasonic oscillation method, which is simple and provides variable yield according to requirements. The emission spectra over a large portion of the visible spectral region (450–650 nm) of QD-CsPbX3 (X = Cl, Br, and I) have tunable compositions that can be halide exchanged using the halide anion exchange technique and quantum size-effects. A strong peak with high intensity of (200) lattice plane of purified QDs-CsPbBr3 film is obtained, confirming the formation of an orthorhombic perovskite crystal structure of the Pnma space group. The photoluminescence of QDs-CsPbBr3 was characterized using a narrow line-width emission of 20 nm, with high quantum yields of up to 99.2%, and radioactive lifetime increasing to 26 ns. Finally, through the excellent advantages of QDs-CsPbBr3 mentioned above, purified perovskite QDs-CsPbBr3 as an active layer was utilized in perovskite quantum dot light-emitting diodes structure applications. As a result, the perovskite QDs-CsPbBr3 light-emitting diodes (LEDs) exhibits a turn-on voltage of 7 V and a maximum luminance of 5.1 cd/m2.
关键词： all-inorganic halide perovskite,perovskite CsPbBr3,quantum dot light-emitting diodes,quantum dots
更新于2025-09-11 14:15:04