One-pot synthesis of red light-emitting CdTexSe(1−x) quantum dots for light-emitting diode application

The size and fraction of red and green CdSe QDs can be controlled precisely during the synthetic process, thus manifesting remarkably enhanced stability.

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Red Light-Emitting Diodes with All-Inorganic CsPbI3/TOPO Composite Nanowires Color Conversion Films

Nanoscale Research Letters ◽

10.1186/s11671-020-03430-w ◽

2020 ◽

Vol 15 (1) ◽

Author(s):

Lung-Chien Chen ◽

Yi-Tsung Chang ◽

Ching-Ho Tien ◽

Yu-Chun Yeh ◽

Zong-Liang Tseng ◽

...

Keyword(s):

Quantum Dots ◽

Light Emitting Diode ◽

Red Light ◽

Trioctylphosphine Oxide ◽

Optical And Electrical Properties ◽

Colloidal Solutions ◽

High Quality ◽

Light Emitting ◽

Hot Injection ◽

Color Conversion

AbstractThis work presents a method for obtaining a color-converted red light source through a combination of a blue GaN light-emitting diode and a red fluorescent color conversion film of a perovskite CsPbI3/TOPO composite. High-quality CsPbI3 quantum dots (QDs) were prepared using the hot-injection method. The colloidal QD solutions were mixed with different ratios of trioctylphosphine oxide (TOPO) to form nanowires. The color conversion films prepared by the mixed ultraviolet resin and colloidal solutions were coated on blue LEDs. The optical and electrical properties of the devices were measured and analyzed at an injection current of 50 mA; it was observed that the strongest red light intensity was 93.1 cd/m2 and the external quantum efficiency was 5.7% at a wavelength of approximately 708 nm when CsPbI3/TOPO was 1:0.35.

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One Pot Synthesis of ZnO@Organic Receptor Core@Shell Quantum Dots for Their Application in UV Light Emitting Devices

Journal of Nanoelectronics and Optoelectronics ◽

10.1166/jno.2018.2263 ◽

2018 ◽

Vol 13 (5) ◽

pp. 693-700

Author(s):

Charu Madhu ◽

Navneet Kaur ◽

Inderpreet Kaur

Keyword(s):

Quantum Dots ◽

Uv Light ◽

Core Shell ◽

One Pot ◽

Light Emitting ◽

Light Emitting Devices ◽

One Pot Synthesis ◽

Organic Receptor

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Influence of Surface Passivation on Perovskite CsPbBr1.2I1.8 Quantum Dots and Application of High Purity Red Light-Emitting Diodes

10.21203/rs.3.rs-796798/v1 ◽

2021 ◽

Author(s):

Lung-Chien Chen ◽

Yen-Hung Tien ◽

Jianjun Tian

Keyword(s):

Quantum Dots ◽

Surface Passivation ◽

Light Emitting Diode ◽

Red Light ◽

Lead Nitrate ◽

Luminous Efficiency ◽

Trioctylphosphine Oxide ◽

Light Emitting ◽

Co Doped

Abstract In this work, trioctylphosphine oxide (TOPO) ligand is employed to improve the quality of CsPbBr1.2I1.8 quantum dots (QDs) films. Lead nitrate (Pb(NO3)2) is also used to passivate the surface of the films. The study of ligand and surface passivation on the luminous efficiency of red light-emitting diode (LED) is discussed. The CsPbBr1.2I1.8 QDs films co-doped with TOPO and Pb(NO3)2 can effectively improve the performance of the CsPbBr1.2I1.8 QDs LEDs due to reduction of non-radiation recombination of the carriers and smooth morphology in the active layer, thus improving the injection and transportation capabilities of carriers. As a result, the highest luminosity and current efficiency are 502.7 cd/m2 and 0.175 cd/A, respectively.

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One-pot synthesis of water-soluble Cu–In–Zn–S/ZnS core/shell quantum dots for efficient white light-emitting devices

Optical Materials ◽

10.1016/j.optmat.2020.109885 ◽

2020 ◽

Vol 105 ◽

pp. 109885

Author(s):

Ting Chen ◽

Yanqiao Xu ◽

Zhixiang Xie ◽

Lianjun Wang ◽

Weihui Jiang ◽

...

Keyword(s):

Quantum Dots ◽

White Light ◽

Water Soluble ◽

Core Shell ◽

One Pot ◽

Light Emitting ◽

Light Emitting Devices ◽

One Pot Synthesis

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Ultrawide Color Gamut Perovskite and CdSe/ZnS Quantum-Dots-Based White Light-Emitting Diode with High Luminous Efficiency

Nanomaterials ◽

10.3390/nano9091314 ◽

2019 ◽

Vol 9 (9) ◽

pp. 1314 ◽

Cited By ~ 4

Author(s):

Chih-Hao Lin ◽

Chieh-Yu Kang ◽

Akta Verma ◽

Tingzhu Wu ◽

Yung-Min Pai ◽

...

Keyword(s):

Quantum Dots ◽

White Light ◽

High Efficiency ◽

Light Emitting Diode ◽

Red Light ◽

Color Gamut ◽

Television System ◽

Light Emitting ◽

Term Operation ◽

Liquid Type

We demonstrate excellent color quality of liquid-type white light-emitting diodes (WLEDs) using a combination of green light-emitting CsPbBr3 and red light-emitting CdSe/ZnS quantum dots (QDs). Previously, we reported red (CsPbBr1.2I1.8) and green (CsPbBr3) perovskite QDs (PQDs)-based WLEDs with high color gamut, which manifested fast anion exchange and stability issues. Herein, the replacement of red PQDs with CdSe/ZnS QDs has resolved the aforementioned problems effectively and improved both stability and efficiency. Further, the proposed liquid-type device possesses outstanding color gamut performance (132% of National Television System Committee and 99% of Rec. 2020). It also shows a high efficiency of 66 lm/W and an excellent long-term operation stability for over 1000 h.

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Red Light-Emitting Diode Based on Blue InGaN Chip with CdTe x S(1 − x) Quantum Dots

Nanoscale Research Letters ◽

10.1186/s11671-016-1814-x ◽

2017 ◽

Vol 12 (1) ◽

Cited By ~ 2

Author(s):

Rongfang Wang ◽

Xingming Wei ◽

Liqin Qin ◽

Zhihui Luo ◽

Chunjie Liang ◽

...

Keyword(s):

Quantum Dots ◽

Light Emitting Diode ◽

Red Light ◽

Light Emitting

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White-light-emitting CdSe quantum dots with “magic size” via one-pot synthesis approach

physica status solidi (a) ◽

10.1002/pssa.201026123 ◽

2010 ◽

Vol 207 (11) ◽

pp. 2472-2477 ◽

Cited By ~ 15

Author(s):

Xinmei Liu ◽

Yang Jiang ◽

Chun Wang ◽

Shanying Li ◽

Xinzheng Lan ◽

...

Keyword(s):

Quantum Dots ◽

White Light ◽

Cdse Quantum Dots ◽

One Pot ◽

Light Emitting ◽

One Pot Synthesis ◽

Synthesis Approach

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Study on the Color-Compensation Effect of Composite Orange-Red Quantum Dots in WLED Application

10.21203/rs.2.23549/v2 ◽

2020 ◽

Author(s):

Xiaoyue Hu ◽

Yangyang Xie ◽

Chong Geng ◽

Shu Xu ◽

Wengang Bi

Keyword(s):

Quantum Dots ◽

Light Emitting Diode ◽

Red Light ◽

Resonance Energy Transfer ◽

Resonance Energy ◽

Light Emitting ◽

Light Region ◽

Color Compensation ◽

Donor Acceptor ◽

Color Rendering

Abstract Quantum dots (QDs) as emerging light-converting materials show the advantage of enhancing color quality of white light-emitting diode (WLED). However, WLEDs employing narrow-emitting monochromic QDs usually present unsatisfactory color rendering in the orange region. Herein, composite orange-red QDs (composite-QDs) are developed through mixing CdSe/ZnS based orange QDs (O-QDs) and red QDs (R-QDs) to compensate the orange-red light for WLEDs. We investigated the effect of self-absorption and fluorescence resonance energy transfer (FRET) process in composite-QDs on the spectral controllability and fluorescent quenching in WLEDs. The concentration and donor/acceptor ratios were also taken into account to analyze the FRET efficiency and help identify suitable composite-QDs for color compensation in the orange-red light region. As the result, the optimized composite-QDs effectively improve the color rendering index of the WLED compared with monochromatic QDs.

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