Organometal halide perovskite nanocrystals embedded in silicone resins with bright luminescence and ultrastability

Lead halide perovskite (LHP) nanocrystals (NCs) have recently garnered enhanced development efforts from research disciplines owing to their superior optical and optoelectronic properties. These materials, however, are unlike conventional quantum dots, because they possess strong ionic character, labile ligand coverage, and overall stability issues. As a result, the system as a whole is highly dynamic and can be affected by slight changes of particle surface environment. Specifically, the surface ligand shell of LHP NCs has proven to play imperative roles throughout the lifetime of a LHP NC. Recent advances in engineering and understanding the roles of surface ligand shells from initial synthesis, through postsynthetic processing and device integration, finally to application performances of colloidal LHP NCs are covered here.

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Section: Role Of Surface Ligands In Reactions With Lhp Ncs and Lhp Nc Processingmentioning

confidence: 99%

Recent Advances in Ligand Design and Engineering in Lead Halide Perovskite Nanocrystals

et al. 2021

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“…d) WLED fabricated via stacking the green emitting halide perovskite with a red phosphor over blue LED. Reproduced with permission …”

Section: Use Of Halide Perovskites In Wled Applicationsmentioning

confidence: 99%

“…Similarly, Wang et al used two commercial silicone resins to prepare stable green organometallic halide perovskite MAPbBr 3 nanocomposites (Figure d). Among these, the QDs prepared with phenyl methyl silicone resin (PMSR) was found to exhibit better stability against UV, water, and thermal than the QDs prepared with the silicone sealant Dow Corning 937 (SSDC).…”

Section: Use Of Halide Perovskites In Wled Applicationsmentioning

confidence: 99%

A Review on Halide Perovskites as Color Conversion Layers in White Light Emitting Diode Applications

Güner

Demir

2018

Physica Status Solidi (a)

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In the last decade, halide perovskites have attracted great interest due to many reasons, including their low cost, solution-processability, superior PL properties, broad range of color tunability, color purity, and defect tolerance, among others. They are in increasing demand for a wide range of applications, such as solar cells, light emitting diodes (LEDs), white LEDs (WLED), and lasers. Yellow phosphors have been heavily employed in solidstate lighting, since its illumination by blue yields white light with various optical features, such as high/low CRI, CCT, and luminous efficiency. However, phosphors as pigments are seldom found and are costly material. In this sense, halide perovskites may offer a promising alternative to phosphors for future solid-state lighting. In this study, the synthesis and optical properties of halide perovskites, as well as their application in WLED as a conversion layer are investigated.

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“…or polymers (trioctylphosphine oxide [12], alkyl phosphate [13], etc.) on the surface of QDs; the other is encapsulating QDs into a matrix such as calcium fluoride [14], polystyrene silicon spheres [15], silicone [16], mesoporous silica [17], zeolite molecular sieves [18], etc. Nevertheless, it seems hard to sustain the excellent optical properties of perovskite QDs when improving their stability, and many polymer coatings are not suitable to high-temperature environments.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis and Optical Properties of CsPbX3/ZIF-8 Composites for Wide-Color-Gamut Display

et al. 2019

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All-inorganic CsPbX3 (X = Cl, Br, and I) perovskite quantum dots (QDs), an emerging type of luminescent materials, have drawn extensive attention in recent years. However, the amelioration of their stability is becoming a critical issue. Herein, we present a facile and efficient approach to prepare novel perovskite QDs/metal–organic frameworks (CsPbX3/ZIF-8) composites under ambient-atmospheric conditions. The obtained composites exhibit better properties including high photoluminescence (PL) quantum yields (QYs) (41.2% for green and 34.8% for red), narrow-band emission (20 nm for green and 31 nm for red), and enhanced stability in comparison to bare QDs. Furthermore, their application in a remote-type white-light-emitting device was explored and a wide color gamut (~137% of the National Television System Committee standard) was achieved, verifying that these novel luminescent composites have great prospect in backlight display application.

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Organometal halide perovskite nanocrystals embedded in silicone resins with bright luminescence and ultrastability

Abstract: The formation of CH3NH3PbBr3 nanocrystals and silicone resin composites greatly improves the stability of CH3NH3PbBr3 nanocrystals against water, heat and UV exposure.

Cited by 39 publications

References 49 publications

Recent Advances in Ligand Design and Engineering in Lead Halide Perovskite Nanocrystals

Recent Advances in Ligand Design and Engineering in Lead Halide Perovskite Nanocrystals

A Review on Halide Perovskites as Color Conversion Layers in White Light Emitting Diode Applications

Facile Synthesis and Optical Properties of CsPbX3/ZIF-8 Composites for Wide-Color-Gamut Display

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