Thermodynamic Study of Formamidinium Lead Iodide (CH 5 N 2 PbI 3 ) from 5 to 357 K

In the present study, the molar heat capacity of solid formamidinium lead iodide (CH N PbI ) was measured over the temperature range from 5 to 357 K using a precise automated adiabatic calorimeter. In the above temperature interval, three distinct phase transitions were found in ranges from 49 to 56...

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Published inEntropy (Basel, Switzerland) Vol. 24; no. 2; p. 145
Main Authors Ciccioli, Andrea, Latini, Alessandro, Luongo, Alessio, Smirnova, Natalia N, Markin, Alexey V, Vecchio Ciprioti, Stefano
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 18.01.2022
MDPI
Subjects
adiabatic calorimetry
Enthalpy
formamidinium lead iodide
Heat
heat capacity
Perovskites
Phase transitions
Specific heat
standard thermodynamic functions
Temperature
Russia
standard thermodynamic functions
formamidinium lead iodide
heat capacity
adiabatic calorimetry
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Summary:In the present study, the molar heat capacity of solid formamidinium lead iodide (CH N PbI ) was measured over the temperature range from 5 to 357 K using a precise automated adiabatic calorimeter. In the above temperature interval, three distinct phase transitions were found in ranges from 49 to 56 K, from 110 to 178 K, and from 264 to 277 K. The standard thermodynamic functions of the studied perovskite, namely the heat capacity ° ( ), enthalpy [ ( ) - (0)], entropy ( ), and [ °( ) - °(0)]/ , were calculated for the temperature range from 0 to 345 K based on the experimental data. Herein, the results are discussed and compared with those available in the literature as measured by nonclassical methods.
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ISSN:1099-4300
1099-4300
DOI:10.3390/e24020145