Wednesday, August 6, 2025
Science
No Result
View All Result
  • Login
  • HOME
  • SCIENCE NEWS
  • CONTACT US
  • HOME
  • SCIENCE NEWS
  • CONTACT US
No Result
View All Result
Scienmag
No Result
View All Result
Home Science News Technology and Engineering

PolyU develops ultra-stable, record high brightness perovskite LEDs with promising applications

August 6, 2024
in Technology and Engineering
Reading Time: 2 mins read
0
PolyU develops ultra-stable, record high brightness perovskite LEDs with promising applications
65
SHARES
593
VIEWS
Share on FacebookShare on Twitter
ADVERTISEMENT

Perovskite materials are significant for enhancing the development and performance of light-emitting diodes (LEDs). However, there are certain technological limitations in advancing overall device efficiency, brightness and lifetime, with the operational stability of Perovskite LEDs (PeLEDs) remaining a major challenge. Researchers from The Hong Kong Polytechnic University (PolyU) have made a breakthrough by developing a 3DFAPbI3 perovskite material system that enables high brightness, efficiency and long device lifetime simultaneously.

Prof. LI Gang, Sir Sze-yuen Chung Endowed Professor in Renewable Energy, Chair Professor of Energy Conversion Technology of the Department of Electrical and Electronic Engineering of PolyU, together with Postdoctoral Fellow Dr Zhiqi LI, Research Assistant Professor Dr Zhiwei REN, and the rest of the research team, have engineered a novel technology using an alkyl-chain-length-dependent ammonium salt molecule modulation strategy. They elucidated the roles of alkylammonium salts in managing crystal orientation, controlling grain size, suppressing non-radiative recombination, and thereby enhancing device performance. This represents a critical leap towards future applications and commercialisation of efficient and ultra-stable PeLEDs with record brightness.

The research team have achieved efficient, ultra-bright, and stable PeLEDs simultaneously, with high  Electroluminescence External Quantum Efficiency of 23.2%, a record radiance of 1,593 W sr−1 m−2 and a much improved record lifetime of 227 h (at a high current density of 100 mA cm−2). This demonstrates the best performance for DC-drive near-infrared PeLEDs at high-brightness and stability levels. Their research “Grain orientation management and recombination suppression for ultra-stable PeLEDs with record brightness”, has been recently published in the energy journal Joule.

ADVERTISEMENT

Prof. Li Gang said, “This strategy suggests that PeLEDs are not only high-efficiency devices in the laboratory but also promising candidates for commercial high-brightness lighting and display applications, competing with commercially available quantum-dot-based and organic LEDs.”

The research team revealed that the performance of PeLEDs is strongly affected by the balance among oriented crystallisation, grain size control and suppression of non-radiative recombination. The key to resolving this dilemma lies in adjusting the molecular interaction between the long-chain alkylammonium salts and perovskite nuclei.

Alkylammoniums promote oriented crystallization of perovskite film for lighting, while the molecular interaction between alkylammonium and perovskite affects PeLEDs performance. Notably, the team has successfully utilised molecular engineering of long-chain alkylammonium salts to modulate crystallisation kinetics. This breakthrough strategy enables the production of high-efficiency and ultra-brightness near-infrared PeLEDs with ultralong stability, even under large current excitation.

In the development of LEDs, PeLEDs possess substantial advantages, including pure colour, a wider display colour gamut range, cost effectiveness and solution processiblity offering greater flexibility in production. The team’s discovery contributes significantly to the advancement of PeLEDs and their technological impact. 

Share26Tweet16
Previous Post

New study reveals how fear and vaccine hesitancy could fuel conspiracy beliefs

Next Post

We can be heroes – Research reveals how ordinary people can become ‘situational heroes’

Related Posts

blank
Technology and Engineering

Positive Controls Propel Microplastics Research Forward

August 6, 2025
blank
Technology and Engineering

Exploring Ceramics: Phase, Conductivity, and Thermistor Insights

August 6, 2025
blank
Technology and Engineering

Emeishan Mantle Plume Forms 400 km Gas-Rich Carbonate Zone in Sichuan Basin

August 6, 2025
blank
Technology and Engineering

Affordable Density Device Separates Microplastics from Sediment

August 6, 2025
blank
Technology and Engineering

Enhancing Li-rich Oxides with Nb-Doping and Coating

August 6, 2025
blank
Technology and Engineering

Revealing Electric Double Layer Structures at Nucleation Sites: A Key Breakthrough for Understanding Electrochemical Cells and Batteries

August 6, 2025
Next Post
Darryn Frost

We can be heroes – Research reveals how ordinary people can become ‘situational heroes’

  • Mothers who receive childcare support from maternal grandparents show more parental warmth, finds NTU Singapore study

    Mothers who receive childcare support from maternal grandparents show more parental warmth, finds NTU Singapore study

    27530 shares
    Share 11009 Tweet 6881
  • University of Seville Breaks 120-Year-Old Mystery, Revises a Key Einstein Concept

    941 shares
    Share 376 Tweet 235
  • Bee body mass, pathogens and local climate influence heat tolerance

    641 shares
    Share 256 Tweet 160
  • Researchers record first-ever images and data of a shark experiencing a boat strike

    506 shares
    Share 202 Tweet 127
  • Warm seawater speeding up melting of ‘Doomsday Glacier,’ scientists warn

    310 shares
    Share 124 Tweet 78
Science

Embark on a thrilling journey of discovery with Scienmag.com—your ultimate source for cutting-edge breakthroughs. Immerse yourself in a world where curiosity knows no limits and tomorrow’s possibilities become today’s reality!

RECENT NEWS

  • Displacement and Disposability: Gich Community in Ethiopia
  • Positive Controls Propel Microplastics Research Forward
  • Rare Cutaneous Strongyloidiasis in Immunocompromised Patient
  • Ursolic Acid Targets Breast Cancer via PLK1 Pathway

Categories

  • Agriculture
  • Anthropology
  • Archaeology
  • Athmospheric
  • Biology
  • Bussines
  • Cancer
  • Chemistry
  • Climate
  • Earth Science
  • Marine
  • Mathematics
  • Medicine
  • Pediatry
  • Policy
  • Psychology & Psychiatry
  • Science Education
  • Social Science
  • Space
  • Technology and Engineering

Subscribe to Blog via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 5,184 other subscribers

© 2025 Scienmag - Science Magazine

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In
No Result
View All Result
  • HOME
  • SCIENCE NEWS
  • CONTACT US

© 2025 Scienmag - Science Magazine

Discover more from Science

Subscribe now to keep reading and get access to the full archive.

Continue reading