Wafer-Scale Patterning Integration of Chiral 3D Perovskite Single Crystals toward High-Performance Full-Stokes...

Area of Science:

• Optoelectronics
• Materials Science
• Nanotechnology

Background:

• Chiral optoelectronic devices face limitations with low-dimensional materials.
• High-performance polarized light detection is a key goal for chiral optoelectronics.
• Chiral 3D perovskites offer potential for superior performance and novel applications.

Purpose of the Study:

• To fabricate a wafer-scale integrated full-Stokes polarimeter using chiral 3D perovskites.
• To investigate the optoelectronic and chiroptical properties of chiral 3D perovskites for polarized light detection.
• To demonstrate high-fidelity circularly and linearly polarized light imaging capabilities.

Main Methods:

• Fabrication of wafer-scale chiral 3D perovskite films using (R/S-PyEA)Pb2Br6.
• One-step capillary-bridge assembly technology for device integration.
• Characterization of photodetector performance, including responsivity, detectivity, and anisotropy factor.

Main Results:

• Chiral 3D perovskites exhibit smaller exciton binding energies (57.3 meV) and excellent circular dichroism absorption.
• Developed circularly polarized light (CPL) photodetectors with ultrahigh responsivity (86.7 A W⁻¹) and detectivity (>4.84 × 10¹³ Jones).
• Achieved high anisotropy factor (0.42), high-fidelity CPL imaging (256 pixels), and a large linear-polarization response (1.52).

Conclusions:

• Chiral 3D perovskites are promising for high-performance chiroptical devices.
• The developed full-Stokes polarimeter integrates linear and circular polarization discrimination.
• This work offers insights for large-scale integration of advanced chiroptical devices.