Double carbon dot assembled mesoporous aluminas: solid-state dual-emission photoluminescence and multifunctional applications

He, Youling; He, Jiangling; Yu, Zhonghang; Zhang, Haoran; Liu, Yingliang; Hu, Gang; Zheng, Mingtao; Dong, Hanwu; Zhuang, Jianle; Lei, Bingfu

doi:10.1039/c8tc00182k

Cited by 47 publications

(21 citation statements)

References 35 publications

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“…As fluorescent carbon nanomaterials with a size less than 10 nm, carbon quantum dots (CQDs) have good water solubility, excellent chemical inertness, unique resistance to light bleaching, low toxicity, and good biocompatibility, etc. Due to their unique optical properties of tunable photoluminescence and good fluorescent stability, CQDs have been widely used in white light emitting diodes (white LEDs) [1][2][3][4]. In particular, published experimental results have shown that CQDs have great application potential in white LEDs as phosphors [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

An Efficient Synthesis and Photoelectric Properties of Green Carbon Quantum Dots with High Fluorescent Quantum Yield

et al. 2020

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To greatly improve the production quality and efficiency of carbon quantum dots (CQDs), and provide a new approach for the large-scale production of high-quality CQDs, green carbon quantum dots (g-CQDs) with high product yield (PY) and high fluorescent quantum yield (QY) were synthesized by an efficient one-step solvothermal method with 2,7-dihydroxynaphthalene as the carbon source and ethylenediamine as the nitrogen dopant in this study. The PY and QY of g-CQDs were optimised by adjusting reaction parameters such as an amount of added ethylenediamine, reaction temperature, and reaction duration. The results showed that the maximum PY and QY values of g-CQDs were achieved, which were 70.90% and 62.98%, respectively when the amount of added ethylenediamine, reaction temperature, and reaction duration were 4 mL, 180 °C, and 12 h, respectively. With the optimised QY value of g-CQDs, white light emitting diodes (white LEDs) were prepared by combining g-CQDs and blue chip. The colour rendering index of white LEDs reached 87, and the correlated colour temperature was 2520 K, which belongs to the warm white light area and is suitable for indoor lighting. These results indicate that g-CQDs have potential and wide application prospects in the field of white LEDs.

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Section: Introductionmentioning

confidence: 99%

An Efficient Synthesis and Photoelectric Properties of Green Carbon Quantum Dots with High Fluorescent Quantum Yield

et al. 2020

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“…[ 29 ] Traditional methods are available to obtain long‐wavelength‐emission CDs through complex material design, multistep purification, and bandgap engineering. [ 30 ] Although the researchers synthesized long‐wavelength emission CDs, they had to face the dilemma: the CDs have low photoluminescence quantum yield (PLQY) and poor stability. [ 31 ] For example, Wang et al reported the design and implementation of solid white‐light‐emitting phosphors (WCDs@PS), which combine blue and orange emissive CDs (BCDs and OCDs) assisted by polystyrene (PS).…”

Section: Introductionmentioning

confidence: 99%

Self‐Quenching‐Resistant Red Emissive Carbon Dots with High Stability for Warm White Light‐Emitting Diodes with a High Color Rendering Index

Zhang

Yang

Wan

et al. 2020

Advanced Optical Materials

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Due to the excellent characteristics of energy‐saving, environmentally friendly and long‐life, the solid‐state lighting based on white light‐emitting diodes (WLEDs) is an emerging technology to replace traditional lighting solutions. However, the lack of red component of the most established method for fabricating commercial WLEDs results in high correlated color temperature (CCT) and low color rendering index (CRI). Herein, red‐emitting carbon dots (R‐CDs) with self‐quenching‐resistant property are synthesized using melamine and dithiosalicylic acid as precursors. In addition, R‐CDs exhibit high thermal and photostability under high temperature and strong blue light irradiation. On the basis of the unique features of R‐CDs, a WLED is fabricated by combining a blue‐LED chip with commercial Ce3+:Y3Al5O12 and R‐CDs phosphors, which exhibits warm white light with a color coordinate of (0.41, 0.38), a high CRI of 92.7 and a CCT of 3827 K. Besides, the WLED exhibits good optical stability upon the increase of drive current from 20 to 100 mA. The results suggest R‐CDs can be used as a color converter to fabricate high‐quality warm WLEDs.

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“…12 Electrostatic force or electrostatic interaction between the CD molecules disturbs their electrostatic stability during agglomeration and thus causes quenching in liquid CDs. 5,13 To resolve the quenching effect of CDs, liquid CDs were dispersed in a single matrix including silica, 14 mesoporous alumina, 15 and several polymers such as polyvinylpyrrolidone (PVP), polyacrylic acid (PAA), polyacrylamide (PAM), 16 polymethyl methacrylate (PMMA), poly(N-isopropylacrylamide) (PNIPAM), 17 and polyvinyl alcohol (PVA). 8,9,[17][18][19][20][21] All of these CDs/ polymer composite lms absorb only in the UV region.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous ultraviolet and first near-infrared window absorption of luminescent carbon dots/PVA composite film

et al. 2019

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Double carbon dot assembled mesoporous aluminas: solid-state dual-emission photoluminescence and multifunctional applications

Abstract: Double carbon dot-based fluorescent materials synthesised in one step possess dual characteristic peaks and multifunctional applications in WLED and transparent sunlight conversion film.

Cited by 47 publications

References 35 publications

An Efficient Synthesis and Photoelectric Properties of Green Carbon Quantum Dots with High Fluorescent Quantum Yield

An Efficient Synthesis and Photoelectric Properties of Green Carbon Quantum Dots with High Fluorescent Quantum Yield

Self‐Quenching‐Resistant Red Emissive Carbon Dots with High Stability for Warm White Light‐Emitting Diodes with a High Color Rendering Index

Simultaneous ultraviolet and first near-infrared window absorption of luminescent carbon dots/PVA composite film

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