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High responsivity circular polarized light detectors based on quasi two-dimensional chiral perovskite films.

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Title: High responsivity circular polarized light detectors based on quasi two-dimensional chiral perovskite films.
Authors: Liu, T
Shi, W
Tang, W
Liu, Z
Schroeder, BC
Fenwick, O
Fuchter, MJ
Item Type: Journal Article
Abstract: Circularly polarized light (CPL) has considerable technological potential, from quantum computing to bioimaging. To maximize the opportunity, high performance photodetectors that can directly distinguish left-handed and right-handed circularly polarized light are needed. Hybrid organic-inorganic perovskites containing chiral organic ligands are an emerging candidate for the active material in CPL photodetecting devices, but current studies suggest there to be a trade-off between the ability to differentially absorb CPL and photocurrent responsivity in chiral perovskites devices. Here, we report a CPL detector based on quasi two-dimensional (quasi-2D) chiral perovskite films. We find it is possible to generate materials where the circular dichroism (CD) is comparable in both 2D and quasi-2D films, while the responsivity of the photodetector improves for the latter. Given this, we are able to showcase a CPL photodetector that exhibits both a high dissymmetry factor of 0.15 and a high responsivity of 15.7 A W-1. We believe our data further advocates the potential of chiral perovskites in CPL-dependent photonic technologies.
Issue Date: 22-Feb-2022
Date of Acceptance: 28-Jan-2022
URI: http://hdl.handle.net/10044/1/94483
DOI: 10.1021/acsnano.1c09521
ISSN: 1936-0851
Publisher: American Chemical Society
Start Page: 2682
End Page: 2689
Journal / Book Title: ACS Nano
Volume: 16
Issue: 2
Copyright Statement: © 2022 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsnano.1c09521
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/R00188X/1
Keywords: chiral perovskite
circular dichroism
circularly polarized light
photodetectors
quasi-2D perovskites
chiral perovskite
circular dichroism
circularly polarized light
photodetectors
quasi-2D perovskites
Nanoscience & Nanotechnology
Publication Status: Published
Conference Place: United States
Embargo Date: 2023-02-01
Online Publication Date: 2022-02-02
Appears in Collections:Chemistry
Faculty of Natural Sciences