MAPbI₃perovskite photodetectors for high-performance optical wireless communication

Area of Science:

• Materials Science
• Optoelectronics
• Communications Engineering

Background:

• High-sensitivity and fast-response photodetectors (PDs) are critical for optical wireless communication (OWC) systems.
• Organic-inorganic hybrid perovskite materials offer promising optoelectronic properties for PD development.

Purpose of the Study:

• To develop and characterize a novel p-i-n structured photodetector based on methylammonium lead iodide (MAPbI3) perovskite.
• To evaluate the performance of the developed perovskite PD in an optical wireless communication system.

Main Methods:

• Fabrication of a p-i-n structured photodetector using an optimized MAPbI3 perovskite precursor solution.
• Performance characterization of the PD including responsivity, response time, specific detectivity, and -3dB bandwidth under 532 nm laser excitation and -0.2 V bias.
• Design and testing of an OWC system incorporating the developed perovskite PD.

Main Results:

• The optimized MAPbI3 perovskite PD exhibited high responsivity (0.98 A W⁻¹), fast response times (12/12.5 μs), high specific detectivity (2.62 × 10¹³ Jones), and a -3dB bandwidth of 24 kHz.
• The OWC system achieved a low bit error rate (<10⁻⁶) at a baud rate of 19200 bps.
• The system demonstrated reliable 9.63 m long-distance communication, transmitting various data types including text and images.

Conclusions:

• The developed MAPbI3 perovskite PD demonstrates excellent optoelectronic performance, suitable for demanding communication applications.
• Perovskite PDs show significant potential for practical implementation in high-performance optical wireless communication systems.
• This research highlights the viability of hybrid perovskite materials in advancing optical communication technologies.