Recent progress in trivalent europium (Eu³⁺)-based inorganic phosphors for solid-state lighting: an overview

Area of Science:

• Materials Science
• Solid-State Lighting
• Photonics

Background:

• Narrowband red-emitting phosphors are essential for high-performance displays and solid-state lighting (SSL).
• Current phosphors present limitations, hindering the development of next-generation technologies.
• Oxide phosphors are key components for phosphor-converted white light-emitting diodes (pc-WLEDs).

Purpose of the Study:

• To provide a comprehensive overview of recent advancements in inorganic phosphors.
• To highlight challenges and strategies for developing narrowband red-emitting oxide phosphors.
• To focus on europium (Eu3+)-based oxide phosphors for pc-WLED applications.

Main Methods:

• Review of existing literature on inorganic phosphors and wavelength converters.
• Analysis of structure-composition-property correlations in Eu3+-based oxide phosphors.
• Identification of challenges in absorption, emission efficiency, and material design.

Main Results:

• Progress in Eu3+-doped oxide phosphors within scheelite and double perovskite structures is reviewed.
• Key structure-property relationships influencing red emission are discussed.
• Challenges in achieving optimal absorption and high emission efficiency are identified.

Conclusions:

• Narrowband red-emitting oxide phosphors are critical for WLEDs, but further research is needed.
• Strategies for improving phosphor performance, including absorption and efficiency, are crucial.
• Future research should focus on novel oxide red phosphors and optimizing existing ones for advanced lighting and display applications.