Grain-size-dependent stability and crystallographic orientation effects in MAFA perovskite thin films

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00642326" target="_blank" >RIV/68378271:_____/25:00642326 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/25:00386370 RIV/00216208:11320/25:10511881

Výsledek na webu

<a href="https://hdl.handle.net/11104/0372303" target="_blank" >https://hdl.handle.net/11104/0372303</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpclett.5c02728" target="_blank" >10.1021/acs.jpclett.5c02728</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Grain-size-dependent stability and crystallographic orientation effects in MAFA perovskite thin films

Popis výsledku v původním jazyce

This study investigates the impact of grain size and crystallographic orientation on the stability and optoelectronic properties of MA0.01FA0.99Pb(I0.99Br0.01)3 (MAFA) perovskite thin films. Grain size was tuned by varying the additive amount of methylammonium chloride (MACl) during fabrication. Macroscopic experiments demonstrated that larger grains with a dominant {100} orientation degrade rapidly under ambient conditions. In contrast, films with random orientation remain stable throughout the experiments. A maximum photoluminescence quantum yield (PLQY > 8%) was observed at an MACl molar concentration range from 0.28 mol dm−3 to 0.38 mol dm−3, which corresponded to the largest grain size with random crystallographic orientation. Beyond this range, the PLQY decreased significantly, indicating a high defect density and consequently increased nonradiative recombination, which leads to a reduced open-circuit voltage (VOC,nonrad). These findings uncover a fundamental tradeoff between grain size and long-term material stability, highlighting the critical role of crystallographic orientation control in the development of durable, high-performance perovskite solar cells.

Název v anglickém jazyce

Grain-size-dependent stability and crystallographic orientation effects in MAFA perovskite thin films

Popis výsledku anglicky

This study investigates the impact of grain size and crystallographic orientation on the stability and optoelectronic properties of MA0.01FA0.99Pb(I0.99Br0.01)3 (MAFA) perovskite thin films. Grain size was tuned by varying the additive amount of methylammonium chloride (MACl) during fabrication. Macroscopic experiments demonstrated that larger grains with a dominant {100} orientation degrade rapidly under ambient conditions. In contrast, films with random orientation remain stable throughout the experiments. A maximum photoluminescence quantum yield (PLQY > 8%) was observed at an MACl molar concentration range from 0.28 mol dm−3 to 0.38 mol dm−3, which corresponded to the largest grain size with random crystallographic orientation. Beyond this range, the PLQY decreased significantly, indicating a high defect density and consequently increased nonradiative recombination, which leads to a reduced open-circuit voltage (VOC,nonrad). These findings uncover a fundamental tradeoff between grain size and long-term material stability, highlighting the critical role of crystallographic orientation control in the development of durable, high-performance perovskite solar cells.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Physical Chemistry Letters

ISSN

1948-7185

e-ISSN

—

Svazek periodika

16

Číslo periodika v rámci svazku

46

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

11901-11906

Kód UT WoS článku

001610699900001

EID výsledku v databázi Scopus

2-s2.0-105022407694