Detail publikace

Speed of sound and elastic properties of single crystals of inorganic and hybrid lead-free iodide perovskites obtained by femtosecond transient optical reflectivity

AMMIRATI, G. O'KEEFFE, P. TURCHINI, S. CATONE, D. PALADINI, A. TOSCHI, F. GAVRANOVIĆ, S. POSPÍŠIL, J. MANNINO, G. VALASTRO, S. MARTELLI, F.

Originální název

Speed of sound and elastic properties of single crystals of inorganic and hybrid lead-free iodide perovskites obtained by femtosecond transient optical reflectivity

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Optoelectronic devices operate under continuous thermal stress that may influence both long-term stability and optical properties of the active material. It is therefore useful to know the elastic properties of the active materials. In general, the elastic constants of a material may be deduced by the measurement of the speed of sound in that material. In this work, we report on the measurements of the speed of sound in three lead-free halide perovskites, namely, the inorganic Cs3Bi2I9 and the hybrid MA3Bi2I9 and MA3Sb2I9, by means of femtosecond transient optical reflectivity that shows oscillations of the signal intensity that are related to the strain field caused by the photoexcitation of electron-hole pairs. The values of the speed of sound thus obtained have allowed us to extract the elastic constant, c11, along the propagation direction of the light. The c11 values indicate a lower stiffness of the hybrid materials, an important aspect when designing optoelectronic devices.

Klíčová slova

GENERATION;PHONONS

Autoři

AMMIRATI, G.; O'KEEFFE, P.; TURCHINI, S.; CATONE, D.; PALADINI, A.; TOSCHI, F.; GAVRANOVIĆ, S.; POSPÍŠIL, J.; MANNINO, G.; VALASTRO, S.; MARTELLI, F.

Vydáno

7. 4. 2025

Nakladatel

AMER PHYSICAL SOC

Místo

COLLEGE PK

ISSN

2475-9953

Periodikum

PHYSICAL REVIEW MATERIALS

Ročník

9

Číslo

4

Stát

Spojené státy americké

Strany od

1

Strany do

5

Strany počet

5

URL

https://doi.org/10.1103/PhysRevMaterials.9.043601

BibTex

@article{BUT198033,
  author="Giuseppe {Ammirati} and Patrick Kevin {O'Keeffe} and Stefano {Turchini} and Daniele {Catone} and Alessandra {Paladini} and Francesco {Toschi} and Stevan {Gavranović} and Jan {Pospíšil} and Giovanni {Mannino} and Salvatore {Valastro} and Faustino {Martelli}",
  title="Speed of sound and elastic properties of single crystals of inorganic and hybrid lead-free iodide perovskites obtained by femtosecond transient optical reflectivity",
  journal="PHYSICAL REVIEW MATERIALS",
  year="2025",
  volume="9",
  number="4",
  pages="1--5",
  doi="10.1103/PhysRevMaterials.9.043601",
  issn="2475-9953",
  url="https://doi.org/10.1103/PhysRevMaterials.9.043601"
}