Performance analysis of PQDCF-coated silicon image sensor using Monte-Carlo ray-trace simulation

Area of Science:

• Materials Science
• Optoelectronics
• Nanotechnology

Background:

• Perovskite quantum dots embedded composite films (PQDCF) show strong photoluminescence.
• PQDCF are promising for enhancing ultraviolet (UV) response in silicon devices.
• Down-shifting materials are crucial for improving UV sensitivity.

Purpose of the Study:

• Analyze the light conversion process in PQDCF for UV enhancement.
• Investigate factors affecting external quantum efficiency (EQE) and resolution.
• Provide guidelines for designing novel UV-sensitive materials.

Main Methods:

• Combined experimental analysis with Monte-Carlo ray-trace simulation.
• Evaluated light conversion efficiency and optical properties.
• Correlated material thickness and reabsorption with device resolution.

Main Results:

• UV EQE is primarily influenced by absorption loss and peak wavelength matching.
• Device resolution is dependent on film thickness and reabsorption.
• Experimental red emissive PQDCF achieved a 20% EQE.
• A predicted EQE of 28% is achievable with optimized materials.

Conclusions:

• Optimizing PQDCF for UV enhancement requires careful consideration of absorption and wavelength.
• Material thickness and reabsorption are critical parameters for resolution.
• This study offers a design framework for advanced UV-sensitive materials.