Bidirectional optical signal transmission between two identical devices using perovskite diodes

Area of Science:

• Optoelectronics
• Materials Science

Background:

• Conventional solution-processable semiconductors face limitations in performance for miniaturized optoelectronic devices.
• Integrating optical signal generation and reception into a single device is crucial for bidirectional optical signal transmission.

Purpose of the Study:

• To develop an efficient, solution-processed perovskite diode capable of both light emission and detection.
• To overcome the limitations of conventional semiconductors in creating high-performance optoelectronic devices.

Main Methods:

• Fabrication of a solution-processed perovskite diode.
• Characterization of the diode's performance in both emission and detection modes.
• Evaluation of device switching between modes by altering bias direction.

Main Results:

• The perovskite diode demonstrated efficient light emission with an external quantum efficiency exceeding 21%.
• The device achieved a light detection limit on the sub-picowatt scale.
• High specific detectivity (over 2×10^12 Jones) was observed at the peak emission wavelength (~804 nm).
• Operation speeds for both emission and detection reached tens of megahertz.

Conclusions:

• The developed perovskite diode offers dual functionality for integrated optoelectronic applications.
• The device enables high-performance bidirectional optical signal exchange between identical units.
• Potential applications include monolithic pulse sensors and bidirectional optical communication systems.