Bottom Electrode Modification Enables Efficient and Bright Silicon‐Based Top‐Emission Perovskite Light‐Emitting Diodes DOI
Lingfeng Zhou,

Minxing Yan,

Guangjie Luo

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 25, 2024

Abstract The integration of perovskites with mature silicon platform has emerged as a promising approach in the development efficient on‐chip light sources and high‐brightness displays. However, performance Si‐based green perovskite light‐emitting diodes (PeLEDs) still falls significantly short compared to their red near‐infrared counterparts. In this study, it is revealed that high work function Au, widely employed top‐emission PeLEDs reflective bottom electrode, exhibits considerably lower reflectivity spectrum than longer wavelengths. Consequently, Ag electrode introduced replace Au enhance reflectivity, ultrathin MoO 3 self‐assembled monolayers (SAMs) are sequentially deposited for surface modification. These results indicate layer removes energy barrier at Ag/polymer hole transport interface, enhancing injection efficiency; while SAMs firmly anchor onto layer, effectively preventing interfacial defect formation. Benefited from organic/inorganic dual‐layer modification strategy, an impressive peak external quantum efficiency 18.2% maximum brightness 81931 cd m −2 successfully fabricated, on par those This achievement marks advancement developing high‐performance full‐spectrum output.

Language: Английский

Perovskite Quantum Dots for the Next‐Generation Displays: Progress and Prospect DOI
Qingsong Shan, Yuhui Dong, Hengyang Xiang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(36)

Published: March 5, 2024

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

Language: Английский

Citations

43
Multi‐Species Surface Reconstruction for High‐Efficiency Perovskite Nanocrystal Light‐Emitting Diodes DOI
Po Lu, Anqi Liu, Min Lu

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(9)

Published: Jan. 17, 2024

Abstract Although colloidal perovskite nanocrystal (PNC) solution has exhibited near‐unity photoluminescence quantum yield (PLQY), the luminance would be severely quenched when PNC is assembled into thin films due to agglomeration and fusion of NCs caused by exfoliation surface ligands non‐radiative Förster resonance energy transfer (FRET) from small large particle sizes, which seriously affected performances light‐emitting diodes (LEDs). Here, we used Guanidine thiocyanate (GASCN) Sodium (NaSCN) achieve effective CsPbI 3 reconstruction. Due strong coordination ability these molecules with anions cations on PNCs, they can provide protection against during centrifugal purification process repair defects so that original uniform size distribution PNCs maintained FRET between close‐packed effectively suppressed, allows emission characteristics preserved. As a result, highly oriented, smooth nearly defect‐free high‐quality are obtained, PLQY as high 95.1 %, far exceeding film, corresponding LEDs exhibit maximum external efficiency 24.5 %.

Language: Английский

Citations

17
Modulation of Nucleation and Growth Kinetics of Perovskite Nanocrystals Enables Efficient and Spectrally Stable Pure-Red Light-Emitting Diodes DOI
Siqi Sun, Min Lu, Po Lu

et al.

Nano Letters, Journal Year: 2024, Volume and Issue: 24(18), P. 5631 - 5638

Published: April 26, 2024

Perovskite light-emitting diodes (PeLEDs) based on CsPb(Br/I)

Language: Английский

Citations

12
Defects in lead halide perovskite light-emitting diodes under electric field: from behavior to passivation strategies DOI
Na Jiang,

Guoquan Ma,

Dandan Song

et al.

Nanoscale, Journal Year: 2024, Volume and Issue: 16(8), P. 3838 - 3880

Published: Jan. 1, 2024

This review summarizes the significance, behaviors, and passivation strategies of defects under electric field in perovskite materials optoelectronic devices.

Language: Английский

Citations

9
Organic Hole‐Transport Layers: An Innovative Approach for Efficient Perovskite Light‐Emitting Diodes DOI
Amjad Islam,

Syed Hamad Ullah Shah,

Zeeshan Haider

et al.

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(17)

Published: Feb. 29, 2024

Abstract Organic–inorganic‐halide‐perovskite (OIHP) based light‐emitting diodes (LEDs) are becoming more and well‐described as having multiple potential uses in lighting display technology, owing to their broad color gamut high purity. Recent research reveals that hole‐transport layers (HTLs) perform crucial roles realizing high‐performance highly stable perovskite (PeLEDs). However, the exploration of organic HTLs for obtaining efficient PeLEDs has lagged behind compared electron‐transport layers. In past few years, some innovative have been developed PeLEDs, which demonstrated excellent performances devices. It established HTL/OIHP interface a significant impact on crystallization behaviors electrical properties OIHP film. Herein, different types (polymer/small molecule) used discussed. Also, mechanism action those devices is also presented. Moreover, recent progress blue, green, red PeLED highlighted. Furthermore, strategies improve performance existing standard reviewed. Additionally, challenges present technology briefly summarized. Lastly, viewpoints regarding ongoing obstacles forthcoming prospects emphasized.

Language: Английский

Citations

8
Perovskite nanocrystal superlattices and their application in light-emitting devices DOI
Siqi Sun, Min Lu, Po Lu

et al.

Materials Science and Engineering R Reports, Journal Year: 2025, Volume and Issue: 164, P. 100984 - 100984

Published: March 25, 2025

Language: Английский

Citations

0
Investigation of energy storage in 2D Dion-Jacobson type materials using promised DFT + U approach DOI
Ahmed Mohamed, Abeer Mera,

Zia Ur Rehman

et al.

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 119, P. 116341 - 116341

Published: March 27, 2025

Language: Английский

Citations

0
Multi‐Species Surface Reconstruction for High‐Efficiency Perovskite Nanocrystal Light‐Emitting Diodes DOI
Po Lu, Anqi Liu, Min Lu

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(9)

Published: Jan. 17, 2024

Abstract Although colloidal perovskite nanocrystal (PNC) solution has exhibited near‐unity photoluminescence quantum yield (PLQY), the luminance would be severely quenched when PNC is assembled into thin films due to agglomeration and fusion of NCs caused by exfoliation surface ligands non‐radiative Förster resonance energy transfer (FRET) from small large particle sizes, which seriously affected performances light‐emitting diodes (LEDs). Here, we used Guanidine thiocyanate (GASCN) Sodium (NaSCN) achieve effective CsPbI 3 reconstruction. Due strong coordination ability these molecules with anions cations on PNCs, they can provide protection against during centrifugal purification process repair defects so that original uniform size distribution PNCs maintained FRET between close‐packed effectively suppressed, allows emission characteristics preserved. As a result, highly oriented, smooth nearly defect‐free high‐quality are obtained, PLQY as high 95.1 %, far exceeding film, corresponding LEDs exhibit maximum external efficiency 24.5 %.

Language: Английский

Citations

2
Understanding perovskite light-emitting diodes through transmission electron microscopy: materials structure, optical regulation and devices DOI
J.-Y. Zhang, Shuwen Yan,

Zunyu Liu

et al.

Nano Energy, Journal Year: 2024, Volume and Issue: unknown, P. 110627 - 110627

Published: Dec. 1, 2024

Language: Английский

Citations

2
Progress on Coherent Perovskites Emitters: From Light‐Emitting Diodes under High Current Density Operation to Laser Diodes DOI Creative Commons
Ga-Young Lee,

Yejin Jun,

Hyeonji Lee

et al.

Advanced Photonics Research, Journal Year: 2024, Volume and Issue: 5(9)

Published: June 12, 2024

Perovskites exhibit appealing optical and electrical properties, making them attractive candidates for efficient luminescent materials with low‐cost straightforward fabrication processes. Their versatility is highlighted by the ability to deposit perovskite thin films on various substrates, including silicon, glass, sapphire, flexible enabling potential monolithic integration silicon applications such as photonic integrated circuits, high‐speed communication. Extensive studies light‐emitting diodes have shown external quantum efficiencies exceeding 20% across a wide spectral range from deep blue near‐infrared, chirality. Additionally, perovskite‐based lasing action has been achieved under pulsed excitation continuous‐wave operation, well in functional diode structures. However, realizing electrically driven laser practical requires injection of intense current densities. This review provides comprehensive overview historical progress lasers didoes, along important design considerations essential their development.

Language: Английский

Citations

1