Efficient and Stable Red Perovskite Light‐Emitting Diodes via Thermodynamic Crystallization Control

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

Published: Sept. 2, 2024

Abstract Efficient and stable red perovskite light‐emitting diodes (PeLEDs) demonstrate promising potential in high‐definition displays biomedical applications. Although significant progress has been made device performance, meeting commercial demands remains a challenge the aspects of long‐term stability high external quantum efficiency (EQE). Here, an situ crystallization regulation strategy is developed for optimizing films through ingenious vapor design. Mixed containing dimethyl sulfoxide carbon disulfide (CS 2 ) incorporated to conventional annealing, which contributes thermodynamics dominated well‐aligned cascade phase arrangement. Additionally, surface defect density minimized by CS molecule adsorption. Consequently, target exhibit smooth exciton energy transfer, reduced density, blocked ion migration pathways. Leveraging these advantages, spectrally PeLEDs are obtained featuring emission at 668, 656, 648 nm, yield record peak EQEs 30.08%, 32.14%, 29.04%, along with prolonged half‐lifetimes 47.7, 60.0, 43.7 h initial luminances 140, 250, 270 cd m −2 , respectively. This work provides universal represents stride toward commercialization PeLEDs.

Language: Английский

Stability Strategies and Applications of Iodide Perovskites

Small, Journal Year: 2024, Volume and Issue: 20(29)

Published: Feb. 16, 2024

Iodide perovskites have demonstrated their unprecedented high efficiency and commercialization potential, superior optoelectronic properties, such as absorption coefficient, carrier mobility, narrow direct bandgap, attracted much attention, especially in solar cells, photodetectors, light-emitting diodes (LEDs). However, whether it is organic iodide perovskite, organic-inorganic hybrid perovskite or all-inorganic the stability of these still poor contamination high. In recent years, scholars studied more to improve well properties from various angles. This paper systematically reviews strategies (component engineering, additive dimensionality reduction phase mixing engineering) used applications years.

Language: Английский

Band edge engineering of CsPbI3 by surface decoration of halogen and alkaline atoms

Computational Materials Science, Journal Year: 2025, Volume and Issue: 253, P. 113863 - 113863

Published: March 26, 2025

Language: Английский