Lead-Free Halide Double Perovskite for High-Performance Photodetectors: Progress and Perspective

Area of Science:

• Materials Science
• Optoelectronics
• Nanotechnology

Background:

• Lead halide perovskites exhibit excellent optoelectronic properties for photodetectors (PDs).
• Toxicity concerns associated with lead hinder the commercialization of lead halide perovskite PDs.
• Developing low-toxic, stable perovskite alternatives is crucial for advancing PD technology.

Purpose of the Study:

• To review the progress of lead-free double perovskite photodetectors over the past three years.
• To focus on A₂M(I)M(III)X₆ and A₂M(IV)X₆ lead-free double perovskite structures.
• To propose strategies for optimizing material defects and device performance.

Main Methods:

• Literature review of lead-free double perovskite photodetector research.
• Analysis of different lead substitution strategies in perovskite structures.
• Identification of pathways for defect engineering and performance enhancement.

Main Results:

• Lead-free double perovskites show significant potential as alternatives to lead-based materials.
• Inspiring results have been achieved in lead-free double perovskite photodetectors.
• Specific structural types like A₂M(I)M(III)X₆ and A₂M(IV)X₆ are highlighted.

Conclusions:

• Lead-free double perovskite photodetectors are a rapidly developing field with great promise.
• Further research into defect optimization and device engineering is essential for future breakthroughs.
• These materials offer a viable path towards safer and high-performance optoelectronic devices.