Effective blue-violet photoluminescence through lanthanum and fluorine ions co-doping for CsPbCl3 perovskite quantum dots

Nanoscale ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 2484-2491 ◽  
Author(s):  
Yue Zhai ◽  
Xue Bai ◽  
Gencai Pan ◽  
Jinyang Zhu ◽  
He Shao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Quantum Yield ◽  
Feasible Method ◽  
Co Doping ◽  
Photoluminescence Quantum Yield ◽  
Perovskite Quantum Dots ◽  
Fluorine Ions

Co-doping of cation (La3+) and anion (F−) ions is a feasible method to improve the optical properties of CsPbCl3 QDs, and high photoluminescence quantum yield of 36.5% is achieved in CsPb(Cl0.7F0.3)3:La3+ QDs.

Poly(Vinylidene Fluoride)-Passivated CsPbBr3 Perovskite Quantum Dots with Near-Unity Photoluminescence Quantum Yield and Superior Stability

2021 ◽  
Author(s):  
Lin Yang ◽  
Bowen Fu ◽  
Xu Li ◽  
Hao Chen ◽  
Lili Li
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Vinylidene Fluoride ◽  
Excellent Performance ◽  
Inorganic Perovskite ◽  
Photoluminescence Quantum Yield ◽  
Poly Vinylidene Fluoride ◽  
Perovskite Quantum Dots ◽  
Optoelectronic Applications ◽  
Pl Quenching

All inorganic perovskite quantum dots (QDs) have received great attention owing to their excellent performance in optoelectronic applications. However, they often suffer from the defect-related photoluminescence (PL) quenching and phase...

scholarly journals Enhancement of Photoluminescence Quantum Yield and Stability in CsPbBr3 Perovskite Quantum Dots by Trivalent Doping

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 710 ◽  
Author(s):  
Sujeong Jung ◽  
Jae Ho Kim ◽  
Jin Woo Choi ◽  
Jae-Wook Kang ◽  
Sung-Ho Jin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Emission Peak ◽  
Trivalent Metal ◽  
Photoluminescence Quantum Yield ◽  
Theoretical Investigations ◽  
Perovskite Quantum Dots ◽  
Substitutional Defects ◽  
Pl Emission ◽  
Metal Doped

We determine the influence of substitutional defects on perovskite quantum dots through experimental and theoretical investigations. Substitutional defects were introduced by trivalent dopants (In, Sb, and Bi) in CsPbBr3 by ligand-assisted reprecipitation. We show that the photoluminescence (PL) emission peak shifts toward shorter wavelengths when doping concentrations are increased. Trivalent metal-doped CsPbBr3 enhanced the PL quantum yield (~10%) and air stability (over 10 days). Our findings provide new insights into the influence of substitutional defects on substituted CsPbBr3 that underpin their physical properties.

scholarly journals Lead-free, stable, high-efficiency (52%) blue luminescent FA3Bi2Br9 perovskite quantum dots

2020 ◽  
Vol 5 (3) ◽  
pp. 580-585 ◽  
Author(s):  
Yalong Shen ◽  
Jun Yin ◽  
Bo Cai ◽  
Ziming Wang ◽  
Yuhang Dong ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Room Temperature ◽  
High Efficiency ◽  
Blue Emission ◽  
Lead Free ◽  
Photoluminescence Quantum Yield ◽  
Perovskite Quantum Dots ◽  
First Time

Lead-free Bi-based perovskite FA3Bi2X9 (X = Cl, Br, and I) quantum dots (QDs) are synthesized for the first time at room temperature. The ligand-passivated FA3Bi2Br9 QDs exhibit blue emission at 437 nm with photoluminescence quantum yield (PLQY) up to 52%.

Original Core–Shell Structure of Cubic CsPbBr3@Amorphous CsPbBrx Perovskite Quantum Dots with a High Blue Photoluminescence Quantum Yield of over 80%

2017 ◽  
Vol 3 (1) ◽  
pp. 245-251 ◽  
Author(s):  
Shixun Wang ◽  
Chenghao Bi ◽  
Jifeng Yuan ◽  
Linxing Zhang ◽  
Jianjun Tian
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Shell Structure ◽  
Core Shell ◽  
Photoluminescence Quantum Yield ◽  
Perovskite Quantum Dots ◽  
Core Shell Structure ◽  
Blue Photoluminescence

Phase-Stable CsPbI3 Perovskite Quantum Dots Achieving Near 100% Absolute Photoluminescence Quantum Yield and Applications in Solar Cells

2018 ◽  
Author(s):  
Qing Shen ◽  
Jincheol kim ◽  
Yaohong Zhang ◽  
Shuzi Hayase ◽  
Taro Toyoda ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Yield ◽  
Photoluminescence Quantum Yield ◽  
Perovskite Quantum Dots

Highly Luminescent Phase-Stable CsPbI3 Perovskite Quantum Dots Achieving Near 100% Absolute Photoluminescence Quantum Yield

ACS Nano ◽  
2017 ◽  
Vol 11 (10) ◽  
pp. 10373-10383 ◽  
Author(s):  
Feng Liu ◽  
Yaohong Zhang ◽  
Chao Ding ◽  
Syuusuke Kobayashi ◽  
Takuya Izuishi ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Photoluminescence Quantum Yield ◽  
Perovskite Quantum Dots

Room-Temperature Construction of Mixed-Halide Perovskite Quantum Dots with High Photoluminescence Quantum Yield

2018 ◽  
Vol 122 (9) ◽  
pp. 5151-5160 ◽  
Author(s):  
Chenghao Bi ◽  
Shixun Wang ◽  
Wen Wen ◽  
Jifeng Yuan ◽  
Guozhong Cao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Room Temperature ◽  
Photoluminescence Quantum Yield ◽  
Perovskite Quantum Dots ◽  
Halide Perovskite

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.

Considerably enhanced exciton emission of CsPbCl3 perovskite quantum dots by the introduction of potassium and lanthanide ions

Nanoscale ◽  
2018 ◽  
Vol 10 (29) ◽  
pp. 14067-14072 ◽  
Author(s):  
Yanan Liu ◽  
Gencai Pan ◽  
Rong Wang ◽  
He Shao ◽  
He Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Lanthanide Ions ◽  
Violet Emission ◽  
Exciton Emission ◽  
Photoluminescence Quantum Yield ◽  
Perovskite Quantum Dots

The photoluminescence quantum yield (PLQY) of blue-violet emission for CsPbCl3 quantum dots (QDs) is still low, which has limited its application in multi-colour displays.

scholarly journals Improving Photoluminescence Quantum Yield of CdTe Quantum Dots Using a Binary Solvent (Water + Glycerin) in the One-Pot Approach Synthesis

2021 ◽  
Author(s):  
Lucas da Rosa ◽  
Isabella Aversa ◽  
Ellen Raphael ◽  
André Polo ◽  
Alfredo Duarte ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Quantum Yield ◽  
Cdte Quantum Dots ◽  
Molar Ratio ◽  
Binary Solvent ◽  
One Pot ◽  
Solvent Water ◽  
Water Solvent ◽  
Photoluminescence Quantum Yield

The present work describes the comparison of the optical and structural properties between CdTe quantum dots (QD) synthesized in water and in the binary solvent (water + glycerin) via one-pot approach synthesis. The optical properties of the nanocrystals obtained with different synthesis parameters were characterized by UV-visible and photoluminescence spectroscopies. The structural chracterization were performed by Fourier transform infrared spectroscopy (FTIR), zeta potential, size-distribution by dynamic light scattering (DLS), X-ray diffraction (XRD), and also by high-resolution transmission electron microscopy (HRTEM). The optical properties of CdTe QD when synthesized in the binary solvent were better, resulting in the increase of photoluminescence quantum yield (φƒ). The CdTe QD prepared in 120 min, at pH 10.0, in the Cd:Te molar ratio 20:1, using the molar ratio 1:1.5 of Cd:TGA (thioglycolic acid), exhibited a narrow photoluminescence band and enhanced φƒ for the samples synthesized in a binary solvent in comparison to water solvent (58.4 and 49.5%, respectively).

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