Highly Stable All‐Inorganic Perovskite Quantum Dots Using a ZnX 2 ‐Trioctylphosphine‐Oxide: Application for High‐Performance Full‐Color Light‐Emitting Diode

2020 ◽  
Vol 8 (8) ◽  
pp. 1901897 ◽  
Author(s):  
Seungmin Baek ◽  
Seokwoo Kang ◽  
Chaeyeon Son ◽  
So Jeong Shin ◽  
Jong H. Kim ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Light Emitting Diode ◽  
Trioctylphosphine Oxide ◽  
Light Emitting ◽  
Inorganic Perovskite ◽  
Full Color ◽  
Perovskite Quantum Dots

All Inorganic Perovskite Quantum Dots Hybrid Green Light-Emitting Diode with Stable Performance

2018 ◽  
Author(s):  
Chung-Ping Yu ◽  
Meng-Ting Chung ◽  
Tzu-Yu Chen ◽  
Yu-Ming Huang ◽  
Chung-Ping Huang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Light Emitting Diode ◽  
Green Light ◽  
Light Emitting ◽  
Inorganic Perovskite ◽  
Perovskite Quantum Dots ◽  
Stable Performance

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

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.

25.1: Invited Paper: Quantum dots based full-color display on micro-light-emitting-diode technology

2018 ◽  
Vol 49 ◽  
pp. 267-270 ◽  
Author(s):  
CHIH-HAO LIN ◽  
CHUN-FU LEE ◽  
CHIEN-CHUNG LIN ◽  
CHEN-HSIEN CHU ◽  
CHIN-WEI SHER ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Color Display ◽  
Full Color

scholarly journals Operando direct observation of spin-states and charge-trappings of blue light-emitting-diode materials in thin-film devices

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Fumiya Osawa ◽  
Kazuhiro Marumoto
Keyword(s):  
Blue Light ◽  
High Performance ◽  
Density Functional ◽  
Light Emitting Diode ◽  
Green Light ◽  
Spin States ◽  
Light Emitting ◽  
Full Color ◽  
Color Displays ◽  
Materials Used

Abstract Spin-states and charge-trappings in blue organic light-emitting diodes (OLEDs) are important issues for developing high-device-performance application such as full-color displays and white illumination. However, they have not yet been completely clarified because of the lack of a study from a microscopic viewpoint. Here, we report operando electron spin resonance (ESR) spectroscopy to investigate the spin-states and charge-trappings in organic semiconductor materials used for blue OLEDs such as a blue light-emitting material 1-bis(2-naphthyl)anthracene (ADN) using metal–insulator–semiconductor (MIS) diodes, hole or electron only devices, and blue OLEDs from the microscopic viewpoint. We have clarified spin-states of electrically accumulated holes and electrons and their charge-trappings in the MIS diodes at the molecular level by directly observing their electrically-induced ESR signals; the spin-states are well reproduced by density functional theory. In contrast to a green light-emitting material, the ADN radical anions largely accumulate in the film, which will cause the large degradation of the molecule and devices. The result will give deeper understanding of blue OLEDs and be useful for developing high-performance and durable devices.

Highly Flexible Green Light-emitting Diode Based on CsPbBr3 Perovskite Quantum Dots

2020 ◽  
Vol 41 (3) ◽  
pp. 233-240
Author(s):  
郭 洁 GUO Jie ◽  
陆 敏 LU Min ◽  
孙思琪 SUN Si-qi ◽  
胡 强 HU Qiang ◽  
张 佳 ZHANG Jia ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Light Emitting Diode ◽  
Green Light ◽  
Light Emitting ◽  
Perovskite Quantum Dots

In Situ Ligand Bonding Management of CsPbI 3 Perovskite Quantum Dots Enables High‐Performance Photovoltaics and Red Light‐Emitting Diodes

2020 ◽  
Vol 59 (49) ◽  
pp. 22230-22237 ◽  
Author(s):  
Junwei Shi ◽  
Fangchao Li ◽  
Yan Jin ◽  
Cheng Liu ◽  
Ben Cohen‐Kleinstein ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Red Light ◽  
Light Emitting ◽  
Perovskite Quantum Dots

All-Inorganic Perovskite Quantum Dots/p-Si Heterojunction Light-Emitting Diodes under DC and AC Driving Modes

2017 ◽  
Vol 6 (2) ◽  
pp. 1700897 ◽  
Author(s):  
Jingjing Liu ◽  
Xuexi Sheng ◽  
Yangqing Wu ◽  
Dongke Li ◽  
Jianchun Bao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Inorganic Perovskite ◽  
Perovskite Quantum Dots

scholarly journals Efficient red perovskite quantum dots light emitting diode fabricated by inkjet printing

2021 ◽  
Author(s):  
Danyang Li ◽  
Junjie Wang ◽  
Miaozi Li ◽  
Biao Guo ◽  
Lan Mu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Inkjet Printing ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Perovskite Quantum Dots

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

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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