Ultrathin, Friendly Environmental, and Flexible CsPb(Cl/Br)3-Silica Composite Film for Blue-Light-Emitting Diodes DOI
Xiong Shen,

Gaozhao Chen,

Xin Peng

et al.

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

Published: Dec. 27, 2024

Due to intrinsic defects in blue-light-emitting perovskite materials, the charge carriers are prone being trapped by trap states. Therefore, preparation of efficient materials remains a significant challenge. Herein, CsPb(Cl/Br)3 nanocrystal (NCs)@SiO2 structures were fabricated through hydrolyzing (3-aminopropyl)-triethoxysilane (APTS). SiO2 can passivate surface states NCs, suppress nonradiative recombination pathways and effectively stabilize NCs. NCs@SiO2 exhibits higher photoluminescence (PL) intensity lifetime compared those pure The enhancement exciton binding energy (Eb) leads increased PL NCs @SiO2, as demonstrated temperature-dependent spectra. Subsequently, 0.3 mm film NCs@SiO2/poly(methyl methacrylate) (PMMA) was optimizing casting method. effective protection provided PMMA, NCs@SiO2/PMMA excellent thermal, water, air stability. Moreover, also good flexibility, maintaining unchanged under bending conditions. Importantly, lead be well encapsulated preventing from leaking into environment. This research demonstrates potential for applications friendly environmental field optoelectronics, including light-emitting diodes (LEDs) flexible displays.

Language: Английский

Surface Treatment with Tailored π-Conjugated Fluorene Derivatives Significantly Enhances the Performance of Perovskite Light-Emitting Diodes DOI
Xiangqian Qin, Mingliang Li, Yaping Zhao

et al.

ACS Nano, Journal Year: 2024, Volume and Issue: 18(22), P. 14696 - 14707

Published: May 23, 2024

Surface defect passivation and carrier injection regulation have emerged as effective strategies for enhancing the performance of perovskite light-emitting diodes (Pero-LEDs). It usually requires two functional molecules to realize separately. In other words, developing one single molecule possessing these capabilities remains challenging. Herein, we utilized π-conjugated fluorene derivatives surface treatment materials, 9,9-Spirobi[fluorene] (SBF), 9,9-Spirobifluoren-2-yl-diphenylphosphine oxide (SPPO1), 2,7-bis(diphenylphosphoryl)-9,9'-spirobifluorene (SPPO13), investigate influence their chemical structure on device optoelectronic performance, especially regulation. Consequently, capability double-bonded SPPO13 surpassed single-bonded SPPO1 nonbonded SBF, which all showed excellent electron transport properties, injection. The maximum external quantum efficiencies (EQE) Pero-LEDs treated with SPPO1, were 8.13, 17.48, 22.10%, respectively, exceeding that derivative-free (6.55%). Notably, SPPO13-treated devices exhibited exceptional reproducibility, yielding an average EQE 20.00 ± 1.10% based 30 devices. This result emphasizes potential tailored Pero-LEDs.

Language: Английский

Citations

4
Efficient Perovskite Light‐Emitting Diodes Processed with Green Solvents Enabling a Wide Antisolvent Time Window DOI
Yuhang Guo,

Zixun Tang,

Zexu Li

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(49)

Published: Aug. 21, 2024

Abstract Green solvent processing of perovskite light‐emitting diodes (PeLEDs) is a necessity for their future commercialization. However, the almost insoluble nature perovskites in most green solvents strongly impedes progress solvent‐processed PeLEDs. Here, novel triethylene glycol (TEG) used as perovskites. TEG has better solubility precursors than reported solvents. Moreover, it found that low vapor pressure and stable precursor solution render much wider time window so‐called antisolvent treatment commonly dimethyl sulfoxide. High‐quality film can be readily synthesized with at 70–100 s, resultant PeLEDs demonstrate nearly identical efficiencies. Together further interface modification, optimized processed exhibit an external quantum efficiency 20.4% maximal luminance over 38000 cd m −2 . It first successful attempt to fabricate high‐efficiency utilizing enlightening development high‐performance prepared eco‐friendly

Language: Английский

Citations

4
Phase Control and Defect Passivation via (2-Aminoethyl)phosphonic Acid-Modified PEDOT:PSS for Blue Perovskite Light-Emitting Devices DOI
Z. Y. Ge, Li Song, Yuan Zhang

et al.

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

Achieving pure blue emission of perovskite light-emitting diodes (PeLEDs) is great importance for fulfilling full-color display and lighting applications. However, achieving high-performance PeLEDs in bromide quasi-2D (Q2D) perovskites has always been a formidable challenge. Here, an interface engineering strategy proposed to regulate the light color device photoelectric performance simultaneously by employing (2-aminoethyl)phosphonic acid (AEP)-modified poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS). The AEP-PEDOT:PSS not only enhances wettability toward precursor but also coordinates with unsaturated Pb atoms, facilitating growth nanocrystals fewer defects. Thereby, shifted from sky-blue region higher PLQY was achieved. Additionally, incorporation AEP reduces conductivity PEDOT:PSS film, enabling more balanced charge transport device. Consequently, modification achieve external quantum efficiency (EQE) 5.2%, approximately 1.9 times that control Our findings may provide valuable insights helpful guidance development Q2D LEDs.

Language: Английский

Citations

0
Green antisolvent process for quasi-2D perovskite self-powered photodetector with high-performance and fast-response imaging capability DOI

Xiaodi Jia,

Shujie Jiao, Song Yang

et al.

Optical Materials, Journal Year: 2025, Volume and Issue: 161, P. 116806 - 116806

Published: Feb. 11, 2025

Language: Английский

Citations

0
Efficient perovskite LEDs with tailored atomic layer number emission at fixed wavelengths DOI Creative Commons
Ligang Wang,

Zher Ying Ooi,

Fengyan Jia

et al.

Science Advances, Journal Year: 2025, Volume and Issue: 11(7)

Published: Feb. 14, 2025

Colloidal quantum dots (QDs) have illuminated computer monitors and television screens due to their fascinating color-tunable properties depending on the size. Here, electroluminescence (EL) wavelength of perovskite LEDs was tuned via atomic layer number (ALN) nanoplates (NPs) instead "size" in conventional QDs. We demonstrated efficient with controllably tailored emission from n = 3, 4, 5, ≥7 ALN NPs specific discrete major peaks at 607, 638, 669, 728 nanometers. These peak external efficiency (EQE) 26.8% high reproducibility less than 1 2 nm difference between batches. High color stability without observable EL spectral change operating best T50 267 minutes 1.0 milliampere per square centimeter also achieved. This work demonstrates a concept tailoring fixed wavelengths, shedding light efficient, emission-discrete, color-stable for next-generation display.

Language: Английский

Citations

0
Nanocrystalline Perovskites for Bright and Efficient Light‐Emitting Diodes DOI Open Access
Kyung Yeon Jang, S. Chang, Dong‐Hyeok Kim

et al.

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

Published: Feb. 19, 2025

Abstract Nanocrystalline perovskites have driven significant progress in metal halide perovskite light‐emitting diodes (PeLEDs) over the past decade by enabling spatial confinement of excitons. Consequently, three primary categories nanocrystalline emerged: nanoscale polycrystalline perovskites, quasi‐2D and nanocrystals. Each type has been developed to address specific challenges enhance efficiency stability PeLEDs. This review explores representative material design strategies for these correlating them with exciton recombination dynamics optical/electrical properties. Additionally, it summarizes trends decade, outlining four distinct phases development. Lastly, this addresses remaining proposes a potential further advance PeLED technology toward commercialization.

Language: Английский

Citations

0
Multiple Chemical Interactions in Additive Engineering of Perovskite for Enhanced Efficiency and Stability of Pure Blue Light-Emitting Diodes DOI

Ziheng Xiong,

Run Zhang, Dezhong Zhang

et al.

The Journal of Physical Chemistry Letters, Journal Year: 2025, Volume and Issue: 16(9), P. 2196 - 2203

Published: Feb. 21, 2025

Additive engineering is extensively employed in perovskite light-emitting diodes (PeLEDs) to enhance the device performance. However, effectiveness of additives restricted, as they generally interact with only one or two components within structure. Consequently, these are unable fulfill comprehensive functional requirements imposed by materials. In this work, we successfully designed and synthesized a multifunctional additive N-(perfluorophenyl)-P,P-diphenylphosphinic amide (PFNPO) via one-step synthesis approach. Multiple chemical interactions can be provided between PFNPO different components, thereby effectively modulating quasi-two-dimensional (quasi-2D) crystallization, passivating coordination-unsaturated Pb defects, suppressing halide ion migration simultaneously. Based on synergistic effects, incorporation pure blue quasi-2D PeLEDs resulted significant enhancement external quantum efficiency from 1.83 4.26%, an operational lifetime that was extended more than 3-fold, improved spectral stability at 466 nm.

Language: Английский

Citations

0
Synergistic Mixed Halide and Additive Strategy for Efficient Pure Red Quasi-2D Perovskite Light-Emitting Diodes DOI
Fanyuan Meng,

Shengxuan Shi,

Zhao Chen

et al.

Journal of Materials Chemistry C, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Stable pure red PeLEDs were achieved via a synergistic mixed-halide and TDA strategy, where concurrently passivates defects anchors halides to suppress spectral redshift for high-performance optoelectronics.

Language: Английский

Citations

0
金属卤化物钙钛矿电致发光稳定性研究进展（特邀） DOI

唐建新 Tang Jianxin,

熊妮 Xiong Ni,

曹欣宇 Cao Xinyu

et al.

Chinese Journal of Lasers, Journal Year: 2025, Volume and Issue: 52(5), P. 0501010 - 0501010

Published: Jan. 1, 2025

Citations

0
In‐Memory Computing with Self‐Rectification and Dynamic Logical Reconfiguration of 12 Algorithms in a Single Halide Perovskites DOI
Song He,

Wenkang Zhong,

Mufan Zhu

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 5, 2025

Abstract Although memristor‐based in‐memory computing (IMC) prototypes demonstrate great progress and performance, integrating high flexibility programmability into large‐scale, high‐density crossbar arrays remain a major hurdle for advanced systems. Herein, the execution of 12 distinct algorithms is successfully implemented in single halide perovskite based IMC, leading to construction memory with reconfigurable logic operation capabilities. Moreover, device exhibits robust anti‐crosstalk paving way its potential application integrated arrays. The work differs from common resistive switching, which needs electro‐forming shift high‐resistance state (HRS) low‐resistance (LRS). Instead, it begins LRS driven by ionic conduction, switching controlled reversible barriers due ion migration accumulation, enabling voltage magnitude polarity independently regulate various behaviors. Additionally, mappings between environmental parameters behavioral patterns are systematically established, providing an approach adapting architectures evolving conditions. This 1R‐IMC provides self‐rectification multiple functions, vital flexible, programmable computing.

Language: Английский

Citations

0