Circularly Polarized Light-Dependent Pyro-Phototronic Effect from 2D Chiral–Polar Double Perovskites

Abstract

Chiral hybrid perovskites combine the advantages of chiral materials and halide perovskites, offering an ideal platform for the design of circularly polarized light (CPL) detectors. The pyro-phototronic effect, as a special mechanism of the photoexcited pyroelectric signal, can significantly improve the performance of photodetectors, whereas it remains a great challenge to achieve pyroelectricity-based CPL detection. In this work, the chiroptical phenomena and the pyro-phototronic effect are combined in chiral–polar perovskites to achieve unprecedented pyroelectric-based CPL detection. Two novel two-dimensional (2D) lead-free chiral-polar double perovskites, S/R-[(4-aminophenyl)­ethylamine]2AgBiI8·0.5H2O, are successfully designed and synthesized by introducing chiral organic ligands into metal halide frameworks. Strikingly, the photoresponse is substantially boosted with the support of the pyro-phototronic effect, showing an increased pyro-phototronic current that is 40 times greater than the photovoltaic current. Furthermore, the pyroelectric-based detector possesses excellent CPL detection capacity to distinguish different polarization states of CPL photons, which achieve an impressive g lph of up to 0.27 at zero bias. This study provides a brand new process for CPL detection by utilizing the pyro-phototronic effect in chiral–polar perovskites, which opens a new avenue for chiral materials in optoelectronic applications.

Circularly Polarized Luminescence Induced by Hydrogen‐Bonding Networks in a One‐Dimensional Hybrid Manganese(II) Chloride

“…[9][10] Recent studies revealed that hybrid metal halides are among the most promising candidates for CPL-active materials, due to their high efficiency, simple synthesis, and great structural versatility. [11][12][13] The strategy of integrating chiral components with metal halides can unlock the manifold peculiar properties such as CPL, [14][15] ferroelectricity, [16][17] secondharmonic generation, [18] and magnetism. [19] Although hybrid metal halides can serve as a good model system for designing novel CPL active materials, [20][21][22][23] achieving both high photoluminescence quantum yield (PLQY) and large luminescence asymmetry factor (g lum ) remains a great challenge, and such high-performance CPL-emitting materials are still rarely reported.…”

Surface Passivation to Enhance the Interfacial Pyro-Phototronic Effect for Self-Powered Photodetection Based on Perovskite Single Crystals

“…The pyro-phototronic effect, which involves the interplay of pyroelectricity, photoexcitation, and semiconductors, has recently been utilized in the development of self-powered PDs based on ferroelectric MHPs. − However, the utilization of the pyro-phototronic effect in nonpolar perovskites is frequently constrained. Recent findings have indicated that centrosymmetric materials possess the capability to manifest pyroelectricity at the interface with alternative materials.…”

Band edge modulation via a hydrogen-bond-free cation in hybrid bismuth iodine for overall photocatalytic CO2 reduction

“…8,14 Inescapably, the lead element would cause irreversible damage to the environment and the human body, which severely limits the application prospects of lead-based photocatalysts in PCR reactions. Comparatively, bismuth( iii )-based hybrid halides provide a nontoxic lead-free alternative for many applications such as photocatalysis, 15–17 photovoltaics 18,19 and radiation detection, 20,21 because bismuth( iii ) possesses a similar electronic structure and 6s 2 inert pair effect to those of lead( ii ). Dismayingly, the reported hybrid bismuth( iii ) halides mostly contain typical hydrogen-bond donors, e.g.…”