Solution-Processed CsPbBr₃ Perovskite Photodetectors for Cost-Efficient Underwater Wireless Optical Communication...

Area of Science:

• Optoelectronics
• Materials Science
• Optical Communications

Background:

• Underwater wireless optical communication (UWOC) offers high bandwidth, low latency, and enhanced security.
• Photodetectors are critical receiver components, with advancements driven by new materials.
• Metal halide perovskites have emerged as promising materials for high-performance photodetectors.

Purpose of the Study:

• To develop high-performance perovskite photodetectors (PDs) for UWOC systems.
• To demonstrate a cost-efficient UWOC system utilizing these perovskite PDs on an FPGA platform.
• To analyze the performance limitations and suggest improvements for perovskite-based UWOC.

Main Methods:

• Fabrication of CsPbBr3 perovskite photodetectors (PDs) using a solution process.
• Integration of perovskite PDs into an underwater wireless optical communication (UWOC) system.
• Demonstration of the UWOC system on a Field-Programmable Gate Array (FPGA) platform.

Main Results:

• Achieved high-performance perovskite PDs with low noise, high responsivity, and fast response.
• Successfully demonstrated a cost-efficient UWOC system achieving 6.25 Mbps with a 0.36% bit error rate (BER).
• Identified long fall time as a limitation at higher data rates, causing BER increase.

Conclusions:

• Perovskite PDs show significant potential for cost-effective UWOC applications.
• FPGA platforms facilitate the development of efficient UWOC systems.
• Future improvements require reducing PD fall time and employing advanced coding techniques for higher data rates.