Novel perovskite quantum dots and hydroxyapatite nanocomposites: Enhanced thermal stability, improved emission intensity, and color-tunable luminescence

Lu, Yaxian; Jia, Guang; Wang, Guojing; Wang, Jianru; Li, Xiao; Zhang, Cuimiao

doi:10.1016/j.jallcom.2020.157989

Cited by 12 publications

(3 citation statements)

References 36 publications

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“…Although it has excellent energy storage capacity and long luminescence time, the luminescence color is single and the luminescence color is not adjustable. − In order to achieve light color adjustability, the long-afterglow material needs to be compounded with other materials to maximize the application potential of the long-afterglow material . In addition, nanoscale all-inorganic cesium lead halide PQDs have excellent optical properties such as tunable band gap, wide luminescence domain, high PL quantum yield, and low defect formation energy. − Unfortunately, the main disadvantages of PQDs are humidity instability, thermal instability, light instability, and oxygen sensitivity, which limit the further application of CsPbX 3 . − …”

Section: Introductionmentioning

confidence: 99%

Perovskite-Based Nanostructures for Fluorescence Afterglow Anticounterfeiting

Hai

Pei

et al. 2023

ACS Appl. Nano Mater.

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Advanced fluorescence anti-counterfeiting technology has attracted the attention of researchers and encourages people to develop more materials with more colors and functions. Here, in order to achieve a full-band afterglow in the visible light region, we designed a composite CsPbI3-CsPbBr3/Sr2MgSi2O7:Eu2+,Dy3+@SiO2, which is composed of nanoscale all-inorganic cesium lead perovskite quantum dots (PQDs) and long-afterglow luminescent materials Sr2MgSi2O7:Eu2+,Dy3+ (SMS). SMS is used to store light energy, and PQDs are used to control afterglow emission colors; through their energy transfer, the afterglow colors can be adjusted in the visible region. SiO2 is used as the coating material to improve the temporary stability of the nanocomposite. The composite mixed with oleic acid (OA) can be used as a dye, which exhibits different emitting colors and afterglow colors under different excitation environments. This research provided an idea for using long-afterglow luminescent materials and PQDs in the field of fluorescence anti-counterfeiting by double anti-counterfeiting of fluorescence and afterglow.

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Section: Introductionmentioning

confidence: 99%

Perovskite-Based Nanostructures for Fluorescence Afterglow Anticounterfeiting

Hai

Pei

et al. 2023

ACS Appl. Nano Mater.

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“…However, the semiconductor materials of CdSe and CdTe QDs with high QY tend to be toxic, limiting their commercial application, while non-toxic InP QDs suffer from low efficiency. QDs are extremely sensitive to oxygen (O 2 ) moisture vapor (H 2 O) and heat. − On the other hand, the stability and lifetime of blue OLEDs are far from commercial standards, and there is still a long way to go. − …”

Section: Introductionmentioning

confidence: 99%

Hybrid Device of Blue GaN Light-Emitting Diodes and Organic Light-Emitting Diodes with Color Tunability for Smart Lighting Sources

et al. 2022

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A lighting device with a wide color-tunable range is still a challenge for lighting based on either organic light-emitting diodes (OLEDs) or inorganic LEDs. In this work, we first proposed a novel hybrid device of organic LEDs and inorganic blue GaN LEDs to achieve full white and other colors. Organic LEDs were stacked with green and red emissive layers and connected with blue GaN LEDs in parallel but in opposite polarity voltage. Under the alternate-current (AC) driving, the hybrid structure can be controlled independently by applying timing variable opposite voltages to emit the light from either blue LEDs or the stacked OLEDs for forming mixed colors. The hybrid device can generate white light, varying in a wide range by changing the amplitude and duty ratio (DR) of AC-driving signals, from cold white to standard white and to warm white (3668–11 833 K). When an AC voltage of (4.80 V, −2.45 V) was applied, the device has a high color gamut of 95.24% National Television System Committee (NTSC) and a high color rendering index (R a) of 92.4%. The novel hybrid device with the blue LED and OLED in opposite polarity exhibits potential applications in smart solid-state lighting, display, and light communication.

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“…This means the prepared PeQDs have almost the same performance compared with the one prepared by the hot injection method [18]. On the other hand, the PeQD stability against air, humidity, and thermal conditions has not been enough [19], which has disturbed the application of PeQDs [20][21][22]. To solve these issues, establishing a strategy to enhance the stability of PeQDs against each condition is extremely significant.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Air Stability of Perovskite Quantum Dots by Manganese Passivation

Sato

Umemoto

Asakura³

et al. 2022

Technologies

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Organic-inorganic perovskite quantum dots (PeQDs) have attracted attention due to their excellent optical properties, e.g., high photoluminescence quantum yields (PLQYs; >70%), a narrow full width at half maximum (FWHM; 25 nm or less), and color tunability adjusted by the halide components in an entire tunability (from 450 nm to 730 nm). On the other hand, PeQD stability against air, humidity, and thermal conditions has still not been enough, which disturbs their application. To overcome these issues, with just a focus on the air stability, Mn2+ ion passivated perovskite quantum dots (Mn/MAPbBr3 QDs) were prepared. Mn2+ could be expected to contract the passivating layer against the air condition because the Mn2+ ion was changed to the oxidized Mn on PeQDs under the air conditions. In this research, Mn/MAPbBr3 QDs were successfully prepared by ligand-assisted reprecipitation (LARP) methods. Surprisingly, Mn/MAPbBr3 QD films showed more than double PLQY stability over 4 months compared with pure MAPbBr3 ones against the air, which suggested that oxidized Mn worked as a passivating layer. Improving the PeQD stability is significantly critical for their application.

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Novel perovskite quantum dots and hydroxyapatite nanocomposites: Enhanced thermal stability, improved emission intensity, and color-tunable luminescence

Cited by 12 publications

References 36 publications

Perovskite-Based Nanostructures for Fluorescence Afterglow Anticounterfeiting

Perovskite-Based Nanostructures for Fluorescence Afterglow Anticounterfeiting

Hybrid Device of Blue GaN Light-Emitting Diodes and Organic Light-Emitting Diodes with Color Tunability for Smart Lighting Sources

Enhanced Air Stability of Perovskite Quantum Dots by Manganese Passivation

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