Blue-luminescent organic lead bromide perovskites: highly dispersible and photostable materials

2015 ◽  
Vol 3 (26) ◽  
pp. 14039-14045 ◽  
Author(s):  
Soranyel Gonzalez-Carrero ◽  
Guillermo Mínguez Espallargas ◽  
Raquel E. Galian ◽  
Julia Pérez-Prieto
Keyword(s):  
Optical Properties ◽  
Quantum Yield ◽  
Uv Light ◽  
Luminescence Quantum Yield ◽  
Reaction Yield ◽  
Inorganic Hybrid ◽  
High Reaction ◽  
Lead Bromide ◽  
Organic Lead

Blue-luminescent and dispersible organic–inorganic hybrid perovskites can be produced with a high reaction yield and valuable optical properties, such as luminescence quantum yield over 20% and high photostability under UV light. This material can be assembled–disassembled reversibly.

scholarly journals AgCl-doped CdSe quantum dots with near-IR photoluminescence

2017 ◽  
Vol 8 ◽  
pp. 1156-1166 ◽  
Author(s):  
Pavel Aleksandrovich Kotin ◽  
Sergey Sergeevich Bubenov ◽  
Natalia Evgenievna Mordvinova ◽  
Sergey Gennadievich Dorofeev
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Quantum Yield ◽  
Reaction Yield ◽  
Cdse Quantum Dots ◽  
Optimal Conditions ◽  
Spherical Nanoparticles ◽  
Near Ir ◽  
Photoluminescence Quantum Yield

We report the synthesis of colloidal CdSe quantum dots doped with a novel Ag precursor: AgCl. The addition of AgCl causes dramatic changes in the morphology of synthesized nanocrystals from spherical nanoparticles to tetrapods and finally to large ellipsoidal nanoparticles. Ellipsoidal nanoparticles possess an intensive near-IR photoluminescence ranging up to 0.9 eV (ca. 1400 nm). In this article, we explain the reasons for the formation of the ellipsoidal nanoparticles as well as the peculiarities of the process. The structure, Ag content, and optical properties of quantum dots are also investigated. The optimal conditions for maximizing both the reaction yield and IR photoluminescence quantum yield are found.

scholarly journals Optical Properties of Fully Inorganic Core/Gradient-Shell CdSe/CdZnS Nanocrystals at the Ensemble and Single-Nanocrystal Levels

2021 ◽  
Author(s):  
Justine Baronnier ◽  
Benoit Mahler ◽  
olivier Boisron ◽  
Christophe Dujardin ◽  
Florian Kulzer ◽  
...  
Keyword(s):  
Optical Properties ◽  
Oleic Acid ◽  
Quantum Yield ◽  
Optical Characterization ◽  
Luminescence Quantum Yield

We report the synthesis and optical characterization of fully inorganic gradient-shell CdSe/CdZnS nanocrystals (NCs) with high luminescence quantum yield (QY, 50 %), which were obtained by replacing native oleic-acid (OA)...

scholarly journals Formation of Carbon Quantum Dots via Hydrothermal Carbonization: Investigate the Effect of Precursors

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 986
Author(s):  
Md Rifat Hasan ◽  
Nepu Saha ◽  
Thomas Quaid ◽  
M. Toufiq Reza
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Microcrystalline Cellulose ◽  
Uv Light ◽  
Synthesis Method ◽  
Hydrothermal Carbonization ◽  
Carbon Quantum Dots ◽  
Medical Diagnostics ◽  
Particle Size Range ◽  
Wide Range

Carbon quantum dots (CQDs) are nanomaterials with a particle size range of 2 to 10 nm. CQDs have a wide range of applications such as medical diagnostics, bio-imaging, biosensors, coatings, solar cells, and photocatalysis. Although the effect of various experimental parameters, such as the synthesis method, reaction time, etc., have been investigated, the effect of different feedstocks on CQDs has not been studied yet. In this study, CQDs were synthesized from hydroxymethylfurfural, furfural, and microcrystalline cellulose via hydrothermal carbonization at 220 °C for 30 min of residence time. The produced CQDs showed green luminescence behavior under the short-wavelength UV light. Furthermore, the optical properties of CQDs were investigated using ultraviolet-visible spectroscopy and emission spectrophotometer, while the morphology and chemical bonds of CQDs were investigated using transmission electron microscopy and Fourier-transform infrared spectroscopy, respectively. Results showed that all CQDs produced from various precursors have absorption and emission properties but these optical properties are highly dependent on the type of precursor. For instance, the mean particle sizes were 6.36 ± 0.54, 5.35 ± 0.56, and 3.94 ± 0.60 nm for the synthesized CQDs from microcrystalline cellulose, hydroxymethylfurfural, and furfural, respectively, which appeared to have similar trends in emission intensities. In addition, the synthesized CQDs experienced different functionality (e.g., C=O, O-H, C-O) resulting in different absorption behavior.

scholarly journals Synthesis of carbon nitride oligomer as a precursor of melon with improved fluorescence quantum yield

2021 ◽  
Vol 2 (18) ◽  
pp. 6083-6093
Author(s):  
Yuto Miyake ◽  
Goichiro Seo ◽  
Kotaro Matsuhashi ◽  
Noriyuki Takada ◽  
Kaname Kanai
Keyword(s):  
Optical Properties ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Carbon Nitride

Melem tetramer, the newly synthesized carbon nitride compound is composed of oligomers with four melem units, is stable in air, and has improved optical properties compared to melon.

Optical properties of organic–inorganic hybrid thin films containing polysilane segments prepared from polysilane–methacrylate copolymers

2000 ◽  
Vol 611 (1-2) ◽  
pp. 40-44 ◽  
Author(s):  
Shinya Mimura ◽  
Hiroyoshi Naito ◽  
Yoshihiko Kanemitsu ◽  
Kimihiro Matsukawa ◽  
Hiroshi Inoue
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Inorganic Hybrid ◽  
Methacrylate Copolymers ◽  
Hybrid Thin Films

Amino acid-templated zinc phosphites: low-dimensional structures, fluorescence, and nonlinear optical properties

2021 ◽  
Author(s):  
Yumei Mao ◽  
Xuehua Dong ◽  
Yuandan Deng ◽  
Jing Li ◽  
Ling Huang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Amino Acid ◽  
Nonlinear Optical ◽  
Uv Light ◽  
Nonlinear Optical Properties ◽  
Light Irradiation ◽  
Blue Fluorescence ◽  
Structure Directing Agent ◽  
Uv Light Irradiation ◽  
Low Dimensional

Two new zinc phosphites were prepared using the amino acid alanine as structure-directing agent. They have tubular and ladder-like structures exhibiting blue fluorescence upon UV light irradiation. Notably, the tubular...

Erbium-activated modified silica glasses with high 4I13/2 luminescence quantum yield

2006 ◽  
Vol 28 (11) ◽  
pp. 1325-1328 ◽  
Author(s):  
S.N.B. Bhaktha ◽  
B. Boulard ◽  
S. Chaussedent ◽  
A. Chiappini ◽  
A. Chiasera ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Luminescence Quantum Yield ◽  
Modified Silica ◽  
Silica Glasses

Organic–inorganic hybrid lead halide perovskites for optoelectronic and electronic applications

2016 ◽  
Vol 45 (3) ◽  
pp. 655-689 ◽  
Author(s):  
Yixin Zhao ◽  
Kai Zhu
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Recent Progress ◽  
Research Issues ◽  
Inorganic Hybrid ◽  
Halide Perovskites ◽  
Film Synthesis ◽  
Lead Halide

This article reviews recent progress on hybrid perovskites including crystal/thin-film synthesis, structural/chemical/electro-optical properties, (opto)electronic applications, and research issues/challenges.

Effect of reaction time and different solvents ratios on the formed phases and optical properties of formamidinium lead bromide

2021 ◽  
Vol 119 ◽  
pp. 111318
Author(s):  
A.M. El-naggar ◽  
Mohamed Bakr Mohamed ◽  
Zein K. Heiba ◽  
Rawabi E. Alatawi ◽  
A.M. Kamal ◽  
...  
Keyword(s):  
Optical Properties ◽  
Reaction Time ◽  
Lead Bromide
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