Quaternary phosphonium bromide passivation for high-performance perovskite quantum dot light-emitting diodes

Key Points

• Enhanced passivation improves the stability of perovskite quantum dots, ensuring higher performance.
• The addition of quaternary phosphonium bromide boosts efficiency metrics significantly—up to 20% over previous methods.
• Assessment using advanced spectroscopic techniques offers insight into the molar absorptivity and emission profiles of treated quantum dots.
• This work highlights the potential for new materials in light-emitting diodes, pointing to greener technologies in optoelectronics.