Ultrasensitive Near‐Infrared Circularly Polarized Light Detection Using 3D Perovskite Embedded with Chiral Plasmonic Nanoparticles

Abstract

Chiral organic ligand-incorporated low-dimensional metal-halide perovskites have received increasing attention for next-generation photodetectors because of the direct detection capability of circularly polarized light (CPL), which overcomes the requirement for subsidiary optical components in conventional CPL photodetectors. However, most chiral perovskites have been based on low-dimensional structures that confine chiroptical responses to the ultraviolet (UV) or short-wavelength visible region and limit photocurrent due to their wide bandgap and poor charge transport. Here, chiroptical properties of 3D Cs 0.05 FA 0.5 MA 0.45 Pb 0.5 Sn 0.5 I 3 polycrystalline films are achieved by incorporating chiral plasmonic gold nanoparticles (AuNPs) into the mixed Pb-Sn perovskite, without sacrificing its original optoelectronic properties. CPL detectors fabricated using chiral AuNP-embedded perovskite films can operate without external power input; they exhibit remarkable chirality in the near-infrared (NIR) region with a high anisotropy factor of responsivity (g res ) of 0.55, via giant plasmon resonance shift of chiral plasmonic AuNPs. In addition, a CPL detector array fabricated on a plastic substrate demonstrates highly sensitive self-powered NIR detection with superior flexibility and durability.

Size-dependent chiro-optical properties of CsPbBr3nanoparticles

“…16,17 Recently, metal halide perovskites imprinted with chiro-optical properties by chiral organic ligands have added to the desirable optoelectronic properties of perovskite materials for applications in spin-dependent optoelectronic devices, 18 spin-polarized charge transport, 19–21 and circularly polarized light emission 22–24 and detection. 25–27 Moon et al reported the first synthesis of chiro-optically active hybrid organic–inorganic 2D metal halide perovskite thin films in 2017. 28 Since then, a gamut of 2D 19,29–31 and 3D 32–37 chiral perovskites which display a range of interesting chiro-optical and spintronic properties have been synthesized.…”

Emerging Opportunities in Lead-Free and Lead–Tin Perovskites for Environmentally Viable Photodetector Applications

“…(a) Flexible perovskite photodetector on a flexible substrate and photocurrent mapping of the photosensor matrix exposed to a heart-shaped laser RCPL illumination and LCPL illumination. Reprinted with permission under a Creative Commons CC BY from ref . Copyright 2022 John Wiley and Sons.…”

Multifunctional and Transformative Metaphotonics with Emerging Materials

“…Various plasmonic designs based on Au, Ag, and Al nanoparticles were also proposed for perovskite photodetectors, − where one of the highest nanostructure-empowered enhancement of external quantum efficiency as high as 2.5 times was demonstrated in the work . Also, near-infrared circularly polarized light detectors fabricated using chiral Au NPs embedded to Pb–Sn perovskite films exhibited remarkable chirality in the near-infrared region with high anisotropic response, owing to a giant plasmon resonance shift of chiral plasmonic Au NPs, which might be prospective to chiral perovskite optoelectronics. , …”