scholarly journals Color-pure red light-emitting diodes based on two-dimensional lead-free perovskites

2020 ◽  
Vol 6 (42) ◽  
pp. eabb0253
Author(s):  
Fanglong Yuan ◽  
Xiaopeng Zheng ◽  
Andrew Johnston ◽  
Ya-Kun Wang ◽  
Chun Zhou ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Red Light ◽  
Crystallization Rate ◽  
Lead Free ◽  
Forming Process ◽  
Information Display ◽  
Light Emitting ◽  
Wide Color Gamut ◽  
Display Technology

It remains a central challenge to the information display community to develop red light-emitting diodes (LEDs) that meet demanding color coordinate requirements for wide color gamut displays. Here, we report high-efficiency, lead-free (PEA)2SnI4 perovskite LEDs (PeLEDs) with color coordinates (0.708, 0.292) that fulfill the Rec. 2100 specification for red emitters. Using valeric acid (VA)—which we show to be strongly coordinated to Sn2+—we slow the crystallization rate of the perovskite, improving the film morphology. The incorporation of VA also protects tin from undesired oxidation during the film-forming process. The improved films and the reduced Sn4+ content enable PeLEDs with an external quantum efficiency of 5% and an operating half-life exceeding 15 hours at an initial brightness of 20 cd/m2. This work illustrates the potential of Cd- and Pb-free PeLEDs for display technology.

Quasi-2D lead-free halide perovskite using superalkali cations for red-light-emitting diodes

Nanoscale ◽  
2021 ◽  
Author(s):  
Tingwei Zhou ◽  
Anlong Kuang
Keyword(s):  
Light Emitting Diodes ◽  
Red Light ◽  
Lead Free ◽  
Two Dimensional ◽  
Light Emitting ◽  
Halide Perovskites ◽  
Halide Perovskite

Two dimensional halide perovskites have attracted intense attention, but there is no study to consider the quasi-2D lead-free perovskites with superalkali cations as potential emitting materials. Herein, the quasi-2D [C6H5(CH2)2NH3]2H5O2Sn2Br7...

scholarly journals High-efficiency CdSe/CdS nanorod–based red light–emitting diodes

2019 ◽  
Vol 27 (6) ◽  
pp. 7935 ◽  
Author(s):  
Yanbin Zhang ◽  
Fengjuan Zhang ◽  
Hongzhe Wang ◽  
Lei Wang ◽  
Fangfang Wang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Red Light ◽  
Light Emitting

High-Efficiency Red Light-Emitting Diodes Based on Multiple Quantum Wells of Phenylbutylammonium-Cesium Lead Iodide Perovskites

ACS Photonics ◽  
2019 ◽  
Vol 6 (3) ◽  
pp. 587-594 ◽  
Author(s):  
Zhuofei He ◽  
Yang Liu ◽  
Zhaoliang Yang ◽  
Jing Li ◽  
Jieyuan Cui ◽  
...  
Keyword(s):  
Quantum Wells ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Red Light ◽  
Multiple Quantum Wells ◽  
Multiple Quantum ◽  
Lead Iodide ◽  
Light Emitting

Multifunctional Naphthol Sulfonic Salt Incorporated in Lead-Free 2D Tin Halide Perovskite for Red Light-Emitting Diodes

ACS Photonics ◽  
2020 ◽  
Vol 7 (8) ◽  
pp. 1915-1922
Author(s):  
Congcong Gao ◽  
Yuanzhi Jiang ◽  
Changjiu Sun ◽  
Jingrui Han ◽  
Tingwei He ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Red Light ◽  
Lead Free ◽  
Light Emitting ◽  
Halide Perovskite

scholarly journals Full-Color Realization of Micro-LED Displays

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2482
Author(s):  
Yifan Wu ◽  
Jianshe Ma ◽  
Ping Su ◽  
Lijun Zhang ◽  
Bizhong Xia
Keyword(s):  
Light Emitting Diodes ◽  
Market Demand ◽  
Single Chip ◽  
Flexible Displays ◽  
Light Emitting ◽  
Color Display ◽  
Full Color ◽  
Color Displays ◽  
Wide Color Gamut ◽  
Display Technology

Emerging technologies, such as smart wearable devices, augmented reality (AR)/virtual reality (VR) displays, and naked-eye 3D projection, have gradually entered our lives, accompanied by an urgent market demand for high-end display technologies. Ultra-high-resolution displays, flexible displays, and transparent displays are all important types of future display technology, and traditional display technology cannot meet the relevant requirements. Micro-light-emitting diodes (micro-LEDs), which have the advantages of a high contrast, a short response time, a wide color gamut, low power consumption, and a long life, are expected to replace traditional liquid-crystal displays (LCD) and organic light-emitting diodes (OLED) screens and become the leaders in the next generation of display technology. However, there are two major obstacles to moving micro-LEDs from the laboratory to the commercial market. One is improving the yield rate and reducing the cost of the mass transfer of micro-LEDs, and the other is realizing a full-color display using micro-LED chips. This review will outline the three main methods for applying current micro-LED full-color displays, red, green, and blue (RGB) three-color micro-LED transfer technology, color conversion technology, and single-chip multi-color growth technology, to summarize present-day micro-LED full-color display technologies and help guide the follow-up research.

High-efficiency deep-red quantum-dot light-emitting diodes with type-II CdSe/CdTe core/shell quantum dots as emissive layers

2016 ◽  
Vol 4 (30) ◽  
pp. 7223-7229 ◽  
Author(s):  
Qingli Lin ◽  
Bin Song ◽  
Hongzhe Wang ◽  
Fengjuan Zhang ◽  
Fei Chen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Red Light ◽  
Core Shell ◽  
Cdse Quantum Dots ◽  
Type Ii ◽  
Light Emitting ◽  
Cdte Core

Highly efficient deep-red light-emitting diodes (LEDs) fabricated by using type-II CdTe/CdSe quantum dots.

High-Efficiency InGaN/GaN Dot-in-a-Wire Red Light-Emitting Diodes

2012 ◽  
Vol 24 (4) ◽  
pp. 321-323 ◽  
Author(s):  
Hieu Pham Trung Nguyen ◽  
Shaofei Zhang ◽  
Kai Cui ◽  
Andreas Korinek ◽  
Gianluigi A. Botton ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Red Light ◽  
Light Emitting
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