Thermal stability of CH3NH3PbIxCl3-x versus [HC(NH2)(2)](0.83)Cs0.17PbI2.7Br0.3 perovskite films by X-ray photoelectron spectroscopy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10422920" target="_blank" >RIV/00216208:11320/20:10422920 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=PQMofmY96D" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=PQMofmY96D</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apsusc.2020.145596" target="_blank" >10.1016/j.apsusc.2020.145596</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermal stability of CH3NH3PbIxCl3-x versus [HC(NH2)(2)](0.83)Cs0.17PbI2.7Br0.3 perovskite films by X-ray photoelectron spectroscopy

Popis výsledku v původním jazyce

The thermal stability of CH3NH3PbIxCl3-x and [HC(NH2)(2)](0.83)Cs0.17PbI2.7Br0.3 perovskite films was studied insitu by X-ray photoelectron spectroscopy. It was found that below 85 degrees C both of them are relatively stable. After annealing above 85 degrees C, we observe a clear perovskite surface decomposition, i.e., a release of organic cations and creation of &quot;metallic lead&quot;. The mixed cation lead mixed halide perovskite, however, decomposes at a much lower rate. For both perovskite films, the metallic to the total lead ratio changes with the same rate for the same annealing temperatures. The release of A-site cations from the ABX(3) crystal structure of perovskite and/or creation of &quot;metallic lead&quot; causes also a small shift of the valence band maximum towards the Fermi level. The release of [HC(NH2)(2)] (+/-) or Cs (+/-) is not as significant as the release of CH3NH3 +/- ; therefore, it may explain why [HC(NH2)(2)](0.83)Cs0.17PbI2.7Br0.3 solar cells are thermally more stable. Therefore, as the stability of CH3NH3 PbIxCl3-x is same as the stability of [HC(NH2)(2)](0.83)Cs0.17PbI2.7Br0.3 below 85 degrees C, there must be more severe degradation pathways that are currently underappreciated on the solar cell level.

Název v anglickém jazyce

Thermal stability of CH3NH3PbIxCl3-x versus [HC(NH2)(2)](0.83)Cs0.17PbI2.7Br0.3 perovskite films by X-ray photoelectron spectroscopy

Popis výsledku anglicky

The thermal stability of CH3NH3PbIxCl3-x and [HC(NH2)(2)](0.83)Cs0.17PbI2.7Br0.3 perovskite films was studied insitu by X-ray photoelectron spectroscopy. It was found that below 85 degrees C both of them are relatively stable. After annealing above 85 degrees C, we observe a clear perovskite surface decomposition, i.e., a release of organic cations and creation of &quot;metallic lead&quot;. The mixed cation lead mixed halide perovskite, however, decomposes at a much lower rate. For both perovskite films, the metallic to the total lead ratio changes with the same rate for the same annealing temperatures. The release of A-site cations from the ABX(3) crystal structure of perovskite and/or creation of &quot;metallic lead&quot; causes also a small shift of the valence band maximum towards the Fermi level. The release of [HC(NH2)(2)] (+/-) or Cs (+/-) is not as significant as the release of CH3NH3 +/- ; therefore, it may explain why [HC(NH2)(2)](0.83)Cs0.17PbI2.7Br0.3 solar cells are thermally more stable. Therefore, as the stability of CH3NH3 PbIxCl3-x is same as the stability of [HC(NH2)(2)](0.83)Cs0.17PbI2.7Br0.3 below 85 degrees C, there must be more severe degradation pathways that are currently underappreciated on the solar cell level.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/LM2018116" target="_blank" >LM2018116: Laboratoř fyziky povrchů - Optická dráha pro výzkum materiálů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Applied Surface Science

ISSN

0169-4332

e-ISSN

—

Svazek periodika

513

Číslo periodika v rámci svazku

Feb

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

145596

Kód UT WoS článku

000523184600112

EID výsledku v databázi Scopus

2-s2.0-85079868240