Blue Emission of α-GaN Colloidal Quantum Dots via Zn Doping

Choi, Yun Chang; Kim, Hyun‐Jin; Lee, Chiho; Son, Jonghyeon; Baik, Hionsuck; Park, Sungnam; Kim, Jaekyun; Jeong, Kwang Seob

doi:10.1021/acs.chemmater.8b05193

Cited by 12 publications

(15 citation statements)

References 35 publications

(61 reference statements)

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“…For example, the reaction of gallium stearate in trioctylamine solvent with thoroughly dried, oxygen-free ammonia at 290 °C produced gallium oxynitride spinel (Ga 2.81 O 3.57 N 0.43 ) rather than GaN (Figure S1). In fact, a careful inspection of reported powder X-ray diffraction (PXRD) patterns for GaN nanocrystals synthesized from gallium cupferron and stearate precursors , revealed a small peak at ∼43° 2θ angle (Cu Kα source), which is not present in either wurtzite (WZ) or zinc blende (ZB) gallium nitride phases but typical for gallium oxynitrides . From these observations, we suspected that metal precursors used for GaN synthesis should not contain Ga–O bonds.…”

Section: Resultsmentioning

confidence: 99%

“…23 Another bimolecular synthesis was recently reported by Choi et al using gallium stearate and lithium bis(trimethylsilyl)amide in 1-octadecene solvent. 24 There are also reports on synthetic routes using thermal decomposition of molecular or polymeric precursors. Manz et al found that molecular gallium azide can thermally decompose in triglyme solvent at 216 °C in 24 h. Unfortunately, the particles were not sufficiently crystalline to provide X-ray diffraction data.…”

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confidence: 99%

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Synthesis of Colloidal GaN and AlN Nanocrystals in Biphasic Molten Salt/Organic Solvent Mixtures under High-Pressure Ammonia

et al. 2023

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Group III nitrides are of great technological importance for electronic devices. These materials have been widely manufactured via high-temperature methods such as physical vapor transport (PVT), chemical vapor deposition (CVD), and hydride vapor phase epitaxy (HVPE). The preparation of group III nitrides by colloidal synthesis methods would provide significant advantages in the form of optical tunability via size and shape control and enable cost reductions through scalable solution-based device integration. Solution syntheses of III-nitride nanocrystals, however, have been scarce, and the quality of the synthesized products has been unsatisfactory for practical use. Here, we report that incorporating a molten salt phase in solution synthesis can provide a viable option for producing crystalline III-nitride nanomaterials. Crystalline GaN and AlN nanomaterials can be grown in a biphasic molten-salt/organic-solvent mixture under an ammonia atmosphere at moderate temperatures (less than 300 °C) and stabilized under ambient conditions by postsynthetic treatment with organic surface ligands. We suggest that microscopic reversibility of monomer attachment, which is essential for crystalline growth, can be achieved in molten salt during the nucleation and the growth of the III-nitride nanocrystals. We also show that increased ammonia pressure increases the size of the GaN nanocrystals produced. This work demonstrates that use of molten salt and high-pressure reactants significantly expands the chemical scope of solution synthesis of inorganic nanomaterials.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Synthesis of Colloidal GaN and AlN Nanocrystals in Biphasic Molten Salt/Organic Solvent Mixtures under High-Pressure Ammonia

et al. 2023

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“…179 In 2019, Chang Choi et al designed a hot-injection strategy to obtain GaN QDs. 180 Gallium chloride and stearic acid were dissolved in ODE and heated to 280 °C under argon. Subsequently, a solution of lithium bis(trimethylsilyl)amide in hexane was rapidly injected.…”

Section: Colloidal Inn Ncs From Lithium Oleylamidementioning

confidence: 99%

Precursor chemistry of metal nitride nanocrystals

Parvizian

Roo

2021

Nanoscale

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“…12−15 So far, the ongoing research concerning blue light-emitting materials is mainly concentrated on organic molecules, 16,17 organometallic complexes, 18−20 inorganic−organic hybrids, 21,22 and inorganic compounds. 23−25 The inorganic compounds commonly include silicates, 26,27 aluminates, 28−30 phosphate, 31,32 nitrides, 33,34 and borates. 35,36 The general method to acquire blue light in inorganic compounds is to dope rare-earth metal ions such as Eu 2+ or Ce 3+ into the host materials.…”

Section: ■ Introductionmentioning

confidence: 99%

“…So far, the ongoing research concerning blue light-emitting materials is mainly concentrated on organic molecules, , organometallic complexes, − inorganic–organic hybrids, , and inorganic compounds. − The inorganic compounds commonly include silicates, , aluminates, − phosphate, , nitrides, , and borates. , The general method to acquire blue light in inorganic compounds is to dope rare-earth metal ions such as Eu 2+ or Ce 3+ into the host materials. Currently, the dominated commercial blue phosphor is the InGaN-based blue phosphor BaMgAl 10 O 17 :Eu 2+ (BAM:Eu) on account of its high luminous efficiency and color purity.…”

Section: Introductionmentioning

confidence: 99%

Rare-Earth-Free Barium Borostannate with Deep-Blue Light Emission

Lin

Wang

et al. 2021

Chem. Mater.

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Playing a crucial role in light-emitting diode (LED) illumination sources, the blue light-emitting materials are commonly obtained by doping rareearth metal ions. Considering the high price, non-renewable supply, and unstable oxidation state of rare-earth metal ions, developing economically and environmentally amicable as well as steady blue light-emitting materials is of great significance. Herein, we have proposed a new structural design strategy of introducing Sn 4+ cations into borates and have successfully constructed a novel barium borostannate, Ba 7 Sn(BO 3 ) 6 . Notably, this is the first SnO 6 -activated rareearth-free deep-blue light-emitting borostannate with extremely high emission energy. By combining Ba 7 Sn(BO 3 ) 6 with other commercial phosphors, a series of white LED devices were successfully fabricated. This promising material will provide a new approach in the development of LED applications.

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Blue Emission of α-GaN Colloidal Quantum Dots via Zn Doping

Cited by 12 publications

References 35 publications

Synthesis of Colloidal GaN and AlN Nanocrystals in Biphasic Molten Salt/Organic Solvent Mixtures under High-Pressure Ammonia

Synthesis of Colloidal GaN and AlN Nanocrystals in Biphasic Molten Salt/Organic Solvent Mixtures under High-Pressure Ammonia

Precursor chemistry of metal nitride nanocrystals

Rare-Earth-Free Barium Borostannate with Deep-Blue Light Emission

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