Full solution-processed heavy-metal-free mini-QLEDs for flexible display applications

Wang, Run; Xiang, Hengyang; Tu, Siyuan; Li, Yan; Zhou, Yihui; Zeng, Haibo

doi:10.1039/d2nr03082a

Cited by 6 publications

(4 citation statements)

References 31 publications

(51 reference statements)

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“…[ 2 ] Whereas the micro‐LED technique assembled by red/green/blue (R/G/B) multi‐chips relies on expensive mass energy transfer technology. [ 3 ] There are insurmountable problems in cost and technique. Accordingly, developing display technique by integrating R/G/B emitters that is monolithic white LEDs (WLEDs) is now a hot spot direction, i.e., monolithic white organic LEDs (WOLEDs), monolithic white quantum dot LEDs (WQLEDs).…”

Section: Introductionmentioning

confidence: 99%

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Minimizing Energy Barrier in Intermediate Connection Layer for Monolithic Tandem WPeLEDs with Wide Color Gamut

Wang

Xiang

et al. 2023

Adv Funct Materials

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Perovskite light‐emitting diodes (PeLEDs) show promising prospects in the wide color gamut display owing to their ultra‐narrow full width at half maximum (FWHM). However, up to now, all perovskite white LEDs integrated by standard red, green, and blue perovskite emitters, namely, monolithic white PeLEDs (WPeLEDs), have been rarely reported, owing to facing some issues, e.g., solvent incompatibility in solution technique, ion exchange, and energy transfer between different emission centers. Herein, centered on these issues, an optimal intermediate connection layer (ICL) of Po‐T2T/LiF/Ag/HAT‐CN/MoO3 is adopted to successfully develop monolithic tandem multicolor PeLEDs and WPeLEDs for the first time. The multicolor PeLEDs can achieve the best external quantum efficiency of 1.8% and the highest luminance of 4844 cd m−2. Besides, the red/green/blue (R/G/B) monolithic tandem WPeLED shows a standard white International Commission on Illumination coordinate of (0.33, 0.33) and achieves an extremely wide color gamut reaching National Television Standards Committee of 130%. This study is the first to realize the standard R/G/B co‐electroluminescence in a monolithic perovskite device and offers a feasible strategy for developing wide‐color gamut perovskite displays.

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Section: Introductionmentioning

confidence: 99%

“…[ 4,5 ] Regrettably, the toxicity of the heavy metal element Cd remains a concern and becomes a deadly obstacle to commercial applications. [ 3,6,7 ]…”

Section: Introductionmentioning

confidence: 99%

Minimizing Energy Barrier in Intermediate Connection Layer for Monolithic Tandem WPeLEDs with Wide Color Gamut

Wang

Xiang

et al. 2023

Adv Funct Materials

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Section: Introductionmentioning

confidence: 99%

“…Since the first QLED was reported, remarkable progress has been made and the external quantum efficiency (EQE) has been over the theoretical limit (20%), thus showing promise for use in real display applications. [9][10][11][12][13][14] The state-of-the-art QLEDs generally use organic-inorganic hybridized charge transport layers, which consist of organic hole transport layers (HTLs) and n-type metal oxide electron transport layers (ETLs). 15 Among the metal oxide ETLs, ZnO nanocrystals (NCs) are the most popular candidates due to their significant electron mobility, ideal band alignment, low synthesis cost and compatibility with alcohol dispersion.…”

Section: Introductionmentioning

confidence: 99%

Sn-doped ZnO for efficient and stable quantum dot light-emitting diodes via a microchannel synthesis strategy

Wang,

Xie,

et al. 2023

Nanoscale

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Perovskite Quantum Dots for the Next‐Generation Displays: Progress and Prospect

Shan,

Dong,

Xiang

et al. 2024

Adv Funct Materials

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The “Nobel Prize in Chemistry 2023” is awarded to Moungi G. Bawendi, Louis E. Brus, and Alexey I. Yekimov for discovering and synthesizing Quantum Dots (QDs). Colloidal QDs possess fascinating size‐, morphological‐, composition‐, and assembly‐tunable electronic and optical properties, which makes them star materials for various optoelectronic applications, especially as luminescent materials for next‐generation wide color gamut ultra‐high‐definition displays. Perovskite QDs (PQDs) have gained widespread attention in recent years. In less than ten years, research on perovskite‐related materials and devices has basically been perfected in terms of quantum yield and external quantum efficiency (EQE). However, on the eve of its industrial application, some key technical indicators and technical processes need to be met and resolved. The development and transformation of QD materials and then focuses on the progress of luminescence linewidth and EQE of the PQD light‐emitting diode. Finally, several application avenues are reviewed for PQDs, and some challenges and opportunities in the field are proposed.

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Full solution-processed heavy-metal-free mini-QLEDs for flexible display applications

Abstract: Micro/Mini displays play an extremely significant role in the modern information society, which is treated as a promising technology for a range of applications. Here, by utilizing the full solution...

Cited by 6 publications

References 31 publications

Minimizing Energy Barrier in Intermediate Connection Layer for Monolithic Tandem WPeLEDs with Wide Color Gamut

Minimizing Energy Barrier in Intermediate Connection Layer for Monolithic Tandem WPeLEDs with Wide Color Gamut

Sn-doped ZnO for efficient and stable quantum dot light-emitting diodes via a microchannel synthesis strategy

Perovskite Quantum Dots for the Next‐Generation Displays: Progress and Prospect

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