Nontoxic blue-emitting hexagonal BN quantum dots for QLED application synthesized by solvothermal pyrolysis of ammonia borane

Chen, Ping; Yang, Shuqi; Liu, Fanghai; Han, Chaolei; Hu, Juntao; Jiang, Yang; Chen, Lei

doi:10.1016/j.apmt.2023.101744

Cited by 4 publications

(6 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Experimental realizations of quantum emitter arrays in strain textured monolayers MoS 2 and WSe 2 were reported previously by utilizing indented nanopillars, confirming the theoretical predictions of exciton funnel effect in a strain-engineered continuously varying band gap landscape. Besides, we note that recently, there are experimental efforts in realizing the quantum-dot light emitters in MoS 2 /WSe 2 heterostructures, and in hexagonal and orthorhombic boron nitride crystals, via the formation of defect states. Our work provides another general and intrinsic approach for achieving excitonic quantum dot arrays in moiré superlattices, which can be verified by photoluminescent measurements on twist-stacked exfoliated monolayer BN.…”

Section: Resultsmentioning

confidence: 98%

Twist-Driven Deep-Ultraviolet-Wavelength Exciton Funnel Effect in Bilayer Boron Nitride

Zhu,

Wang,

Yang

2023

ACS Appl. Opt. Mater.

View full text Add to dashboard Cite

Realizing direct band gap quantum dots working within the deep-ultraviolet frequency is highly desired for electrooptical and biomedical applications while remaining challenging. In this work, we combine first-principles many-body perturbation theory and effective Hamiltonian approximation to propose the realization of arrays of deep-ultraviolet excitonic quantum dots in twisted bilayer hexagonal boron nitride. The effective quantum confinement of excitons can reach ∼400 meV within small twisting angles, which is about four times larger than those observed in twisted semiconducting transition metal dichalcogenides. Especially because of enhanced electron−hole attraction, those excitons will accumulate via the so-called exciton funnel effect to the direct band gap regime, giving the possibility to better luminescence performance and manipulating coherent arrays of deep-ultraviolet quantum dots.

show abstract

Section: Resultsmentioning

confidence: 98%

Twist-Driven Deep-Ultraviolet-Wavelength Exciton Funnel Effect in Bilayer Boron Nitride

Zhu,

Wang,

Yang

2023

ACS Appl. Opt. Mater.

View full text Add to dashboard Cite

show abstract

“…Quantum dots have narrow emission peaks, adjustable emission colors with their own size, and high emission efficiency, making them very suitable as luminescent materials for display devices. The half peak width of quantum dot emission is about 30 nm, while the half peak width of traditional organic molecule emission is about 100 nm [9].…”

Section: Quantum Dot Light Emitting Diodes (Qled)mentioning

confidence: 94%

Comparative analysis between light-emitting diodes using quantum dots and organic light-emitting diodes

Shen

2023

ACE

View full text Add to dashboard Cite

Due to its customizable emission peaks, high saturation chromaticity, and low cost, quantum dot luminescence technology has gained significant attention as the most cutting-edge technology in the optoelectronics sector. Whether the technology of making light emitting diodes from solution treatable quantum dots-(QLED)-can emerge and compete with organic light emitting diode (OLED) displays will become the focus of this paper. Through the property and function of the quantum dots and by looking at some waveforms of quantum dots, the essay describes the specific structure of QLED and the preparation technology of QLED. Furthermore, using these properties and functions, quantum dot technology produces displays with a wider color gamut. And compared with OLED, the paper comes to the conclusion that although QLEDs are slightly inferior in stability to OLEDs, they are superior in color gamut, low cost, and temperature according to the studies of quantum dots and organic light emitting diodes at different temperatures, color rendering indices, and energy band structures.

show abstract

“…Recently, Chen et al confirmed that ammonia borane is an ideal precursor for synthesizing BNQDs, products synthesized in CCl 4 exhibited ultrahigh crystallinity and uniform size distribution (3−7 nm). 99 On the other hand, by altering the composition of raw materials during the hydrothermal/solvothermal process, it is possible to utilize a variety of molecules for intelligent surface functionalization, thereby modulating the surface chemical properties of BNQDs to exhibit distinct characteristics. Yang et al employed thiourea and L-cysteine as distinct sulfur precursors to synthesize sulfur-modulated BNQDs with modified surface chemistry and bandgap via a microwaveassisted hydrothermal method.…”

Section: Template Methodmentioning

confidence: 99%

“…Boron sources typically include H 3 BO 3 , and nitrogen sources often comprise ammonia–water, melamine, urea, etc., reacting under specific solvents to produce BNQDs with uniform sizes and high yields. Table has listed information on synthesizing BNQDs via the hydrothermal/solvothermal method. − Liu et al synthesized hydroxyl and amino-functionalized BNQDs with a quantum yield (QY) of up to 18.3% by hydrothermal synthesis treating H 3 BO 3 and ammonia solution in one pot at 200 °C for 12 h (Figure e) . The synthesized BNQDs displayed a good size distribution (average size of 2.38 nm, Figure f–g) and an average thickness of 0.91 nm (Figure h–i), indicating that the prepared BNQDs were mostly monolayered.…”

Section: Strategies For Synthesis Of 0d H-bn Nanomaterialsmentioning

confidence: 99%

Methods for Preparation of Hexagonal Boron Nitride Nanomaterials

Yang,

Dai,

Jiang

et al. 2024

Chem. Mater.

View full text Add to dashboard Cite

Hexagonal boron nitride (h-BN) represents a promising inorganic compound, garnering widespread attention for its unique combination of electrical insulation, thermal conductivity, lightweight nature, and chemical stability. The past decades have witnessed the advent of diverse h-BN nanostructures, which preserve the intrinsic superior attributes of h-BN while endowing these materials with unique nanoscale properties. This paper aims to provide a comprehensive review of the synthesis methods for h-BN nanomaterials across different dimensions. Furthermore, it outlines the applications of h-BN nanomaterials in energy storage, thermal management, catalysis, and other fields, and concludes with a discussion of challenges and prospects. It is conceived as a foundational guide aimed at the practical production of h-BN nanomaterials.

show abstract

Nontoxic blue-emitting hexagonal BN quantum dots for QLED application synthesized by solvothermal pyrolysis of ammonia borane

Cited by 4 publications

References 47 publications

Twist-Driven Deep-Ultraviolet-Wavelength Exciton Funnel Effect in Bilayer Boron Nitride

Twist-Driven Deep-Ultraviolet-Wavelength Exciton Funnel Effect in Bilayer Boron Nitride

Comparative analysis between light-emitting diodes using quantum dots and organic light-emitting diodes

Methods for Preparation of Hexagonal Boron Nitride Nanomaterials

Contact Info

Product

Resources

About