This paper presents a thermodynamic phenomenological model predicting extraordinarily large elastocaloric (eC) strengths for (111)-oriented metal-free perovskite ferroelectric [MDABCO](NH₄)₁₃ thin films. The predicted room-temperature isothermal eC ΔSc/Δσ and adiabatic eC ΔTad/Δσ are 20 times higher than those of traditional ferroelectric oxides like BaTiO₃ thin films. The eC performance can be improved by reducing Young's modulus or enhancing the thermal expansion coefficient. This research suggests the potential of metal-free organic ferroelectrics for next-generation eC refrigeration devices.
Publisher
npj Computational Materials
Published On
Aug 16, 2021
Authors
Cheng Li, Yu Hui Huang, Jian-Jun Wang, Bo Wang, Yong Jun Wu, He Tian, Long-Qing Chen, Zijian Hong
Tags
elastocaloric
ferroelectric
metal-free perovskite
refrigeration
thermodynamic model
thermal expansion
Young's modulus
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