The emergence and prospects of carbon dots with solid-state photoluminescence for light-emitting diodes

Yuan, Ting; Teng, Qian; Li, Chenhao; Li, Jinsui; Su, Wen; Song, Xianzhi; Shi, Yuxin; Xu, Huimin; Han, Yuyi; Wei, Shuyan; Zhang, Yang; Li, Xiaohong; Li, Yunchao; Fan, Louzhen; Yuan, Fanglong

doi:10.1039/d3mh01292a

Cited by 10 publications

(3 citation statements)

References 100 publications

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“…In recent years, researchers have extensively studied the fluorescence characteristics and mechanisms of CDs, resulting in significant achievements. 52–54 However, the investigation into the RTP mechanism of CDs remains at an early stage of development. Further exploration of the RTP luminescence mechanism of CDs is crucial for adjusting the visible-light-excited RTP characteristics of CDs.…”

Section: Luminescence Mechanisms Of Visible-light-excited Rtp CD Mate...mentioning

confidence: 99%

Visible-light-excited room-temperature phosphorescent carbon dots: preparation strategies, mechanisms, and applications

Guo,

Yang,

et al. 2024

J. Mater. Chem. C

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Section: Luminescence Mechanisms Of Visible-light-excited Rtp CD Mate...mentioning

confidence: 99%

Visible-light-excited room-temperature phosphorescent carbon dots: preparation strategies, mechanisms, and applications

Guo,

Yang,

et al. 2024

J. Mater. Chem. C

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“…The limited space of electronics makes it difficult to efficiently export heat, resulting in a significant temperature rise in electronics. Related studies have shown that the reliability and service life of electronics will decrease with high temperature and even lead to electronics failure [4,5]. Therefore, developing new and efficient thermal management technologies to achieve effective heat dissipation in electronics is an urgent issue that needs to be addressed [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Ultra-Thin Vapor Chamber with Composite Wick for Electronics Thermal Management

Zhang,

Huang,

Bai

et al. 2024

Micromachines

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Ultra-thin vapor chambers (UTVCs) are widely used to cool high-power electronics due to their excellent thermal conductivity. In this study, a UTVC of 82 mm × 58 mm × 0.39 mm with composite wick was prepared. The composite wick is composed of two layers of copper mesh and multiple spiral-woven meshes (SWMs), and the composite wick was applied in UTVC to improve liquid replenishment performance and temperature uniformity. Furthermore, the thermal performance of UTVCs with different support column diameters, filling ratios (FRs), and SWM structures was experimentally studied. The results found that the equivalent thermal conductivity (ETC) decreases as the diameter of the support column increases; the UTVC with 0.5 mm support column diameter has the highest ETC, at 3473 W/(m·K). Then, the effect of FR on the heat transfer performance of UTVCs with SWM numbers of 0, 1, 2, and 3 (0 SWMs, 1 SWM, 2 SWMs, 3 SWMs) is consistent, the 30% FR UTVC with 3 SWMs having the highest ETC, at 3837 W/(m·K). Finally, the increased number of SWMs can significantly improve the ultimate power of the UTVCs, the UTVC with 3 SWMs having the highest ultimate power, at 26 W. The above experimental studies indicate that the designed and manufactured UTVCs have great potential advantages in thermal dissipation for electronics.

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“…Numerous methods, typically top-down and bottom-up methods, are extensively investigated for developing miscellaneous CDs and catering to a wide range of applications. [1][2][3][4][5][6] CDs-based electroluminescent light-emitting diodes (LEDs) are highly spotlighted due to their attractive merits such as rich carbon sources, low-cost solution processability, and environment-friendly characteristics excluding toxic Cd and Pb, and universal modification by surface treatment and chemical bonding, showing potential applications in new-generation displays and lighting. For assembling CD-based LEDs, one uses CDs as emitters by constructing multilayer electroluminescent devices, while the other uses photoluminescence (PL) characteristics of CDs pumped by conventional GaN-based UV or blue LED chips.…”

Section: Introductionmentioning

confidence: 99%

Carrier Injection Tailoring and Electroluminescence Properties of Carbon Dots in Electroluminescent Light‐Emitting Diodes

Qu,

Yao,

et al. 2023

Physica Status Solidi (a)

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Fantastic carbon dots (CDs) are demonstrated as carrier injection tailoring and emitters of electroluminescent light‐emitting diodes (LEDs). Using N‐Methyl‐2‐pyrrolidone as carbon source, CDs are facilely synthesized by hydrothermal method. Transmission electron microscopy, X‐ray photoelectron spectroscopy, atomic force microscopy and photoluminescence measurements confirm the CDs showing good film morphology and particular electronic properties. With CDs doped poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) tailoring hole injection, the 2‐(4‐biphenyl)‐5‐(4‐tert‐butylphenyl)‐1,3,4‐oxadiazole based UV organic LED (OLED) gives maximum radiance of 2.34 mW/cm2 and external quantum efficiency (EQE) of 1.51%. With CDs as electron injection layer, the inverted UV OLED shows maximum radiance of 1.13 mW/cm2 and EQE of 0.38%. The hole/electron injection characteristics are further elucidated using current‐voltage characteristics and impedance spectroscopy. Electroluminescent LEDs using pure CDs and CDs doped poly(9‐vinylcarbazole) (PVK) as emitters are demonstrated. The CDs based electroluminescent LED shows superior electro‐optical properties with maximum luminance of 48.67 cd/m2 at 8 V, luminous efficiency of 0.022 cd/A, power efficiency of 0.023 lm/W, and EQE of 0.023%, owing to the energy transfer from PVK to CDs. Our researches pave an alternative approach for broadening CDs applications and advancing novel electroluminescent LEDs.This article is protected by copyright. All rights reserved.

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The emergence and prospects of carbon dots with solid-state photoluminescence for light-emitting diodes

Abstract: The significant features emerging from carbon dots (CDs), such as bright and tunable photoluminescence, high thermal stability, and low toxicity, have shown tremendous potential for next generation optoelectronics. Despite great...

Cited by 10 publications

References 100 publications

Visible-light-excited room-temperature phosphorescent carbon dots: preparation strategies, mechanisms, and applications

Visible-light-excited room-temperature phosphorescent carbon dots: preparation strategies, mechanisms, and applications

Experimental Investigation on Ultra-Thin Vapor Chamber with Composite Wick for Electronics Thermal Management

Carrier Injection Tailoring and Electroluminescence Properties of Carbon Dots in Electroluminescent Light‐Emitting Diodes

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