Graphene-Templated Achiral Hybrid Perovskite for Circularly Polarized Light Sensing

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F24%3A00599061" target="_blank" >RIV/61388955:_____/24:00599061 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0356623" target="_blank" >https://hdl.handle.net/11104/0356623</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acsami.4c10289" target="_blank" >10.1021/acsami.4c10289</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Graphene-Templated Achiral Hybrid Perovskite for Circularly Polarized Light Sensing

Popis výsledku v původním jazyce

This study points out the importance of the templating effect in hybrid organic-inorganic perovskite semiconductors grown on graphene. By combining two achiral materials, we report the formation of a chiral composite heterostructure with electronic band splitting. The effect is observed through circularly polarized light emission and detection in a graphene/alpha-CH(NH2)(2)PbI3 perovskite composite, at ambient temperature and without a magnetic field. We exploit the spin-charge conversion by introducing an unbalanced spin population through polarized light that gives rise to a spin photoconductive effect rationalized by Rashba-type coupling. The prepared composite heterostructure exhibits a circularly polarized photoluminescence anisotropy g(CPL) of similar to 0.35 at similar to 2.54 x 10(3) W cm(-2) confocal power density of 532 nm excitation. A carefully engineered interface between the graphene and the perovskite thin film enhances the Rashba field and generates the built-in electric field responsible for photocurrent, yielding a photoresponsivity of similar to 10(5) A W-1 under similar to 0.08 mu W cm(-2) fluence of visible light photons. The maximum photocurrent anisotropy factor g(ph) is similar to 0.51 under similar to 0.16 mu W cm(-2) irradiance. The work sheds light on the photophysical properties of graphene/perovskite composite heterostructures, finding them to be a promising candidate for developing miniaturized spin-photonic devices.

Název v anglickém jazyce

Graphene-Templated Achiral Hybrid Perovskite for Circularly Polarized Light Sensing

Popis výsledku anglicky

This study points out the importance of the templating effect in hybrid organic-inorganic perovskite semiconductors grown on graphene. By combining two achiral materials, we report the formation of a chiral composite heterostructure with electronic band splitting. The effect is observed through circularly polarized light emission and detection in a graphene/alpha-CH(NH2)(2)PbI3 perovskite composite, at ambient temperature and without a magnetic field. We exploit the spin-charge conversion by introducing an unbalanced spin population through polarized light that gives rise to a spin photoconductive effect rationalized by Rashba-type coupling. The prepared composite heterostructure exhibits a circularly polarized photoluminescence anisotropy g(CPL) of similar to 0.35 at similar to 2.54 x 10(3) W cm(-2) confocal power density of 532 nm excitation. A carefully engineered interface between the graphene and the perovskite thin film enhances the Rashba field and generates the built-in electric field responsible for photocurrent, yielding a photoresponsivity of similar to 10(5) A W-1 under similar to 0.08 mu W cm(-2) fluence of visible light photons. The maximum photocurrent anisotropy factor g(ph) is similar to 0.51 under similar to 0.16 mu W cm(-2) irradiance. The work sheds light on the photophysical properties of graphene/perovskite composite heterostructures, finding them to be a promising candidate for developing miniaturized spin-photonic devices.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/8F21009" target="_blank" >8F21009: Perovskites Quantum Dots based Broadband Detectors – from a quantum dot to a functional detector</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ACS Applied Materials and Interfaces

ISSN

1944-8244

e-ISSN

1944-8252

Svazek periodika

16

Číslo periodika v rámci svazku

39

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

52789-52798

Kód UT WoS článku

001317109800001

EID výsledku v databázi Scopus

2-s2.0-85204643049