Phenyl-Terminated Coupling Interface Enabled Highly Efficient and Stable Multiwavelength Perovskite Single...

Area of Science:

• Materials Science
• Optoelectronics
• Semiconductor Devices

Background:

• Amino-terminated siloxanes offer CMOS-compatible optoelectronics but lack stability due to hydrophilic groups.
• Perovskite single crystal (PSC)/silicon integration is crucial for advanced optoelectronic devices.

Purpose of the Study:

• To develop a stable interfacial coupling molecule for PSC/silicon integrated devices.
• To enhance environmental reliability and facilitate epitaxial growth of PSCs.
• To achieve efficient multiwavelength photodetection from X-ray to NIR.

Main Methods:

• Introduction of anilino-methyl-triethoxysilane (AMTES), a phenyl-terminated molecule, as an interfacial layer.
• Fabrication of MAPbI₃ SC/silicon integrated devices using AMTES.
• Characterization of photodetection properties, including detectivity, sensitivity, bandwidth, and dynamic range.

Main Results:

• AMTES improves device environmental reliability and lowers silicon surface energy.
• Achieved high detectivity (3.84 × 10¹³ cm Hz^1/2 W^-1) in visible-NIR and X-ray sensitivity (1.18 × 10⁴ μC Gy_air^-1 cm^-2).
• Demonstrated ultra-wide -3 dB bandwidth (67,300 Hz), high linear dynamic range (112 dB), and 96% performance retention after 28 days.

Conclusions:

• AMTES provides effective galvanic coupling for stable and high-performance PSC/silicon optoelectronics.
• The developed interface enables efficient multiwavelength photodetection for diverse applications.
• This work presents a new strategy for interfacial engineering in on-chip PSC-silicon optoelectronic devices.