Vertically Concentrated Quantum Wells Enabling Highly Efficient Deep‐Blue Perovskite Light‐Emitting Diodes DOI
Yu Xia, Bin Song, Zhipeng Zhang

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(22)

Published: April 3, 2024

Abstract Deep‐blue perovskite light‐emitting diodes (PeLEDs) based on quasi‐two‐dimensional (quasi‐2D) systems exist heightened sensitivity to the domain distribution. The top‐down crystallization mode will lead a vertical gradient distribution of quantum well (QW) structure, which is unfavorable for deep‐blue emission. Herein, thermal annealing treatment proposed address polydispersity issue QWs in quasi‐2D perovskites. formation large‐n domains at upper interface film can be effectively inhibited by introducing low‐temperature source process. Combined with utilization NaBr inhibit undesirable n =1 domain, vertically concentrated QW structure ultimately attained. As result, fabricated device delivers narrow and stable emission 458 nm an impressive external efficiency (EQE) 5.82 %. Green sky‐blue PeLEDs remarkable EQE 21.83 % 17.51 are also successfully achieved, respectively, using same strategy. findings provide universal strategy across entire perovskites, paving way future practical application PeLEDs.

Language: Английский

Vertically Concentrated Quantum Wells Enabling Highly Efficient Deep‐Blue Perovskite Light‐Emitting Diodes DOI
Yu Xia, Bin Song, Zhipeng Zhang

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(22)

Published: April 3, 2024

Deep-blue perovskite light-emitting diodes (PeLEDs) based on quasi-two-dimensional (quasi-2D) systems exist heightened sensitivity to the domain distribution. The top-down crystallization mode will lead a vertical gradient distribution of quantum well (QW) structure, which is unfavorable for deep-blue emission. Herein, thermal annealing treatment proposed address polydispersity issue QWs in quasi-2D perovskites. formation large-n domains at upper interface film can be effectively inhibited by introducing low-temperature source process. Combined with utilization NaBr inhibit undesirable n=1 domain, vertically concentrated QW structure ultimately attained. As result, fabricated device delivers narrow and stable emission 458 nm an impressive external efficiency (EQE) 5.82 %. Green sky-blue PeLEDs remarkable EQE 21.83 % 17.51 are also successfully achieved, respectively, using same strategy. findings provide universal strategy across entire perovskites, paving way future practical application PeLEDs.

Language: Английский

Citations

18
Blue perovskite LEDs: A comprehensive review of emission control strategies for enhanced performance DOI
Jing Peng, Feifan Wang, Peng Luo

et al.

Coordination Chemistry Reviews, Journal Year: 2025, Volume and Issue: 528, P. 216425 - 216425

Published: Jan. 4, 2025

Language: Английский

Citations

1
Surface matrix regulation of perovskite quantum dots for efficient solar cells DOI

Shuhuai Xiao,

Xinyi Mei,

Xiaoliang Zhang

et al.

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(16), P. 5756 - 5794

Published: Jan. 1, 2024

This review comprehensively discusses the latest advances in surface matrix regulation of perovskite quantum dots and proposes opportunities challenges for high-performance solar cells.

Language: Английский

Citations

7
CsPbBr3 perovskite quantum dots-based Janus membrane with multifunction of luminescence, magnetism and aeolotropic electroconductivity DOI

Xintong Huo,

Yunrui Xie,

Yuqi Sheng

et al.

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 666, P. 615 - 628

Published: April 9, 2024

Language: Английский

Citations

5
Chelation strategy induced blue-shift for efficient deep-blue perovskite light-emitting diodes DOI
Yu Xia, Zhipeng Zhang, Yuhang Zhou

et al.

Science Bulletin, Journal Year: 2024, Volume and Issue: 69(15), P. 2332 - 2336

Published: May 31, 2024

Language: Английский

Citations

4
Optimizing Perovskite Surfaces to Enhance Post‐Treatment for Efficient Blue Mixed‐Halide Perovskite Light‐emitting Diodes DOI Creative Commons

Aqiang Liu,

Zheng Zhang, Jing Li

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 4, 2024

Abstract The halide postdeposition treatment technique is a widely used strategy for mitigating defects in perovskite. However, when applied to mixed‐halide perovskites, it often leads surface and internal heterogeneity, which compromises luminescence performance spectral stability. In this work, blue 3D perovskites are engineered with acetate (Ac⁻)‐rich surfaces optimize the post‐treatment process achieve homogeneity. findings demonstrate that strong interaction between Ac⁻ ions Pb 2+ significantly reduces formation of vacancy caused by washing effect isopropanol during post‐treatment. This defect reduction slows infiltration into perovskite lattice, providing more time reconstruction minimizing accumulation introduced at surface. As result, mild redistribution occurs, promoting uniform phase. approach enabled development PeLEDs record external quantum efficiency 19.28% (emission peak 482 nm), comparable state‐of‐the‐art reduced‐dimensional perovskite‐based PeLEDs. Additionally, device demonstrated narrowband stable electroluminescence spectrum full width half maximum (FWHM) less than 16 nm.

Language: Английский

Citations

4
Colloidal Perovskite Nanocrystals for Blue‐Light‐Emitting Diodes and Displays DOI Creative Commons
Md Aftabuzzaman, Yongju Hong, Sangyeon Jeong

et al.

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 9, 2025

The evolution of display technology toward ultrahigh resolution, high color purity, and cost-effectiveness has generated interest in metal halide perovskites, particularly colloidal perovskite nanocrystals (PeNCs). PeNCs exhibit narrow emission spectra, photoluminescence quantum yields, wide gamuts, rendering them promising candidates for next-generation displays. Despite significant advancements light-emitting diode (PeLED) technology, challenges remain regarding the efficiencies PeNC-based blue LEDs. Addressing these challenges, including both inherent external instabilities operational devices, is important as they collectively impede broader acceptance utilization PeNCs. Herein, a comprehensive overview syntheses dimension- composition-controlled critical factors influencing performances LEDs provided. Moreover, associated with application are explored, potentials displays emphasized. This review highlights path forward future development

Language: Английский

Citations

0
Europium(II)-Doped CsBr Nanocrystals in Glass for Spectrally Stable and Narrow-Band Blue-Light-Emitting Applications DOI

Ying Ye,

Kai Li, Yudong Zhang

et al.

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(17), P. 20145 - 20152

Published: Sept. 4, 2024

Language: Английский

Citations

2
Efficient and Stable Blue Perovskite Light‐Emitting Diodes Enabled by Effective Hydrolysis of Dichloride DOI
Xin Zhou, Zhenwei Ren, Zhiyong Zheng

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 19, 2024

Abstract Despite the substantial progress in sky‐blue (480−495 nm) perovskite light‐emitting diodes (PeLEDs), pure‐blue PeLEDs (<480 merely show moderate performances. As a straightforward and effective facile way to obtain emission, bromide‐chloride mixed perovskites have received considerable attention. However, tricky issue of halide migration makes tough challenge achieve efficient with stable electroluminescence (EL) spectra. Herein, situ treatment Cl‐rich benzene phosphorus oxydichloride (BPOD) is proposed high‐quality by simultaneously enlarging bandgap, passivating vacancy defects, immobilizing ions through hydrolysis products chloride phenylphosphonic acid. result, highly‐performed maximum external quantum efficiency (EQE) 9.3% at 477 nm, an impressive lifetime 34.7 min 104 cd m −2 , very EL spectra are achieved, which superior conventional based on lead‐chloride precursor, representing one best performances for PeLEDs. Therefore, this work contributes feasible method

Language: Английский

Citations

1
Vertically Concentrated Quantum Wells Enabling Highly Efficient Deep‐Blue Perovskite Light‐Emitting Diodes DOI
Yu Xia, Bin Song, Zhipeng Zhang

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(22)

Published: April 3, 2024

Abstract Deep‐blue perovskite light‐emitting diodes (PeLEDs) based on quasi‐two‐dimensional (quasi‐2D) systems exist heightened sensitivity to the domain distribution. The top‐down crystallization mode will lead a vertical gradient distribution of quantum well (QW) structure, which is unfavorable for deep‐blue emission. Herein, thermal annealing treatment proposed address polydispersity issue QWs in quasi‐2D perovskites. formation large‐n domains at upper interface film can be effectively inhibited by introducing low‐temperature source process. Combined with utilization NaBr inhibit undesirable n =1 domain, vertically concentrated QW structure ultimately attained. As result, fabricated device delivers narrow and stable emission 458 nm an impressive external efficiency (EQE) 5.82 %. Green sky‐blue PeLEDs remarkable EQE 21.83 % 17.51 are also successfully achieved, respectively, using same strategy. findings provide universal strategy across entire perovskites, paving way future practical application PeLEDs.

Language: Английский

Citations

0