Amine-Free CsPbBr3 Perovskite Nanoplatelets Produced with Monolayer-Precision Thickness Control

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27740%2F24%3A10255177" target="_blank" >RIV/61989100:27740/24:10255177 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.acs.org/doi/10.1021/acsmaterialslett.4c00670" target="_blank" >https://pubs.acs.org/doi/10.1021/acsmaterialslett.4c00670</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acsmaterialslett.4c00670" target="_blank" >10.1021/acsmaterialslett.4c00670</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Amine-Free CsPbBr3 Perovskite Nanoplatelets Produced with Monolayer-Precision Thickness Control

Popis výsledku v původním jazyce

Ultrathin lead halide perovskite nanoplatelets (NPLs) can enable tunable emission across the entire visible spectrum of light. The band-gap tunability of NPLs does not require halide composition engineering, so halide segregation can be avoided. However, their photoluminescence quantum yield (PLQY) and optoelectronic applications are often hampered due to reversible protonation and deprotonation of conventional amine ligands. Herein, we demonstrate the synthesis of benzenesulfonate-terminated CsPbBr3 NPLs without the use of any amine, and we clarify their nucleation and growth mechanism. The thickness of amine-free NPLs is controlled with monolayer-level precision, and thus, their emission wavelength is tuned between 437 and 504 nm. Amine-free NPLs are solely terminated by a benzenesulfonate group, leading to a Cs-rich surface. The amine-free NPLs exhibit PLQYs up to 80%, and slow charge carrier relaxation. This work offers a comprehensive study of surface chemistry and ligand dynamics of perovskite NPLs.

Název v anglickém jazyce

Amine-Free CsPbBr3 Perovskite Nanoplatelets Produced with Monolayer-Precision Thickness Control

Popis výsledku anglicky

Ultrathin lead halide perovskite nanoplatelets (NPLs) can enable tunable emission across the entire visible spectrum of light. The band-gap tunability of NPLs does not require halide composition engineering, so halide segregation can be avoided. However, their photoluminescence quantum yield (PLQY) and optoelectronic applications are often hampered due to reversible protonation and deprotonation of conventional amine ligands. Herein, we demonstrate the synthesis of benzenesulfonate-terminated CsPbBr3 NPLs without the use of any amine, and we clarify their nucleation and growth mechanism. The thickness of amine-free NPLs is controlled with monolayer-level precision, and thus, their emission wavelength is tuned between 437 and 504 nm. Amine-free NPLs are solely terminated by a benzenesulfonate group, leading to a Cs-rich surface. The amine-free NPLs exhibit PLQYs up to 80%, and slow charge carrier relaxation. This work offers a comprehensive study of surface chemistry and ligand dynamics of perovskite NPLs.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20500 - Materials engineering

Projekt

—

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

ACS Materials Letters

ISSN

2639-4979

e-ISSN

2639-4979

Svazek periodika

6

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

2425-2433

Kód UT WoS článku

001228035800001

EID výsledku v databázi Scopus

2-s2.0-85194111284