Photoluminescence properties of Cu-doped CdTeSe alloyed quantum dots versus laser excitation power and temperature

Hiền, Nguyễn Thị; Tan, P.M.; Van, H.T.; Lien, Vu Thi Kim; Độ, Phan Văn; Loan, P. N.; Kiên, Nguyễn Trung; Luyen, Nguyen Thi; Ca, Nguyễn Xuân

doi:10.1016/j.jlumin.2019.116838

Cited by 8 publications

(7 citation statements)

References 39 publications

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“…At the same time, the broadening of spectra was observed. As shown in Figure 3A , the PL intensity of the green CdZnSeS/ZnSeS QDs at 433 K is 91.1% lower than that at 295 K. The redshift is 32.26 meV from 295 to 433 K. As shown in Figure 3B , the PL intensity of the red CdZnSeS/ZnSeS QDs at 433 K is 92.4% lower than that at 295 K. However, the redshift of the red QDs is basically the same as that of green QDs, from 295 to 433 K. According to the PL emission–excitation intensity relationship, the small redshift of the samples with the increase of temperature implies that the quaternary/ternary alloyed CdZnSeS/ZnSeS QDs have a stronger excitonic character with fewer defect states ( Chen et al, 2019 ; Hien et al, 2020 ), which demonstrated that the synthesized samples have high quality.…”

Section: Resultsmentioning

confidence: 98%

Highly Efficient and Stable CdZnSeS/ZnSeS Quantum Dots for Application in White Light-Emitting Diode

Chen

Zhong

et al. 2022

Front. Chem.

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Semiconductor quantum dots (QDs) are a promising luminescent phosphor for next-generation lightings and displays. In particular, QD-based white light-emitting diodes (WLEDs) are considered to be the candidate light sources with the most potential for application in displays. In this work, we synthesized quaternary/ternary core/shell alloyed CdZnSeS/ZnSeS QDs with high bright emission intensity. The QDs show good thermal stability by performing high temperature-dependent experiments that range from 295 to 433 K. Finally, the WLED based on the CdZnSeS/ZnSeS QDs exhibits a luminous efficiency (LE) of 28.14 lm/W, an external quantum efficiency (EQE) of 14.86%, and a warm bright sunlight close to the spectrum of daylight (Commission Internationale de l'éclairage (CIE) coordinates 0.305, 0.371). Moreover, the photoluminescence (PL) intensity, LE, EQE, and correlated color temperature (CCT) of as-prepared QD WLED remained relatively stable with only slight changes in the luminescence stability experiment.

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Section: Resultsmentioning

confidence: 98%

Highly Efficient and Stable CdZnSeS/ZnSeS Quantum Dots for Application in White Light-Emitting Diode

Chen

Zhong

et al. 2022

Front. Chem.

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“…Similar peaks due to Cu-related luminescence centres have been reported in the literature. 43,44 The PL emission peak at longer wavelength l 2 blue-shied from 692 nm to 659 nm with increasing Cu concentration. The blue shi is due to the more replacement of Cd ions with smaller radius ions of Cu with increasing concentrations of Cu.…”

Section: Effect Of Dopant Concentrationmentioning

confidence: 99%

Influence of precursor ratio and dopant concentration on the structure and optical properties of Cu-doped ZnCdSe-alloyed quantum dots

Ca¹,

Van

et al. 2020

RSC Adv.

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“…Many efforts have been made to determine the structural features of alloyed II-VI quantum dots based on cadmium. In 2020, both CdSeTe [33] and CdTeSe [76] were studied separately, and their diffraction lines were found to be (111), (220), and (311), which lie between the lines of their parent binary CdSe and CdTe with a zinc blend structure as…”

Section: Structural Propertiesmentioning

confidence: 99%

Cadmium-Based Quantum Dots Alloyed Structures: Synthesis, Properties, and Applications

Ebrahim,

Al-Hartomy,

Wageh

2023

Materials

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Cadmium-based alloyed quantum dots are one of the most popular metal chalcogenides in both the industrial and research fields owing to their extraordinary optical and electronic properties that can be manipulated by varying the compositional ratio in addition to size control. This report aims to cover the main information concerning the synthesis techniques, properties, and applications of Cd-based alloyed quantum dots. It provides a comprehensive overview of the most common synthesis methods for these QDs, which include hot injection, co-precipitation, successive ionic layer adsorption and reaction, hydrothermal, and microwave-assisted synthesis methods. This detailed literature highlights the optical and structural properties of both ternary and quaternary quantum dots. Also, this review provides the high-potential applications of various alloyed quantum dots.

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Photoluminescence properties of Cu-doped CdTeSe alloyed quantum dots versus laser excitation power and temperature

Cited by 8 publications

References 39 publications

Highly Efficient and Stable CdZnSeS/ZnSeS Quantum Dots for Application in White Light-Emitting Diode

Highly Efficient and Stable CdZnSeS/ZnSeS Quantum Dots for Application in White Light-Emitting Diode

Influence of precursor ratio and dopant concentration on the structure and optical properties of Cu-doped ZnCdSe-alloyed quantum dots

Cadmium-Based Quantum Dots Alloyed Structures: Synthesis, Properties, and Applications

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