.png){kind=icon}
返回
Phonon entropy engineering for caloric cooling
.png){kind=icon}
OA
AI
DOI：10.1063/5.0152301.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Electrocaloric cooling, with the advantages of zero global warming potential, high efficiency, smart size, etc., is regarded as a promising next-generation technology for green refrigeration. The exotic negative electrocaloric effect (ECE) in antiferroelectric materials forms the basis to improve the caloric cooling power density, but the underlying mechanism remains elusive. By using a fully first-principles method, we successfully simulate the electric field-triggered structural phase transition from antiferroelectric to ferroelectric in a prototypical antiferroelectric material PbZrO3 (PZO). Through tracking the phonon entropy evolution and measuring the temperature-dependent polarization along the transition path, we disclose that the negative ECE in PZO originates from the latent heat associated with phonon entropy rather than the previously recognized dipolar entropy. Accordingly, a new concept of phonon entropy engineering is proposed that engineering the density of states especially for low-frequency phonons can modulate the phonon entropy, which provides an effective route to enhance the cooling power density.
Keyword:
THIN-FILMS
ANTIFERROELECTRICITY
期刊
IF:
11.6
论文数:
1.2K
被引数:
1.3W
机构
引用论文
Giant Negative Electrocaloric Effect in Antiferroelectric La-Doped Pb(ZrTi)O3 Thin Films Near Room Temperature室温附近反铁电La掺杂Pb(ZrTi)O3薄膜的巨大负电热效应.png)
ADVANCED MATERIALS
ADVANCED MATERIALSIF26.8
PREAI
分享收藏分享收藏An Unconventional Transient Phase with Cycloidal Order of Polarization in Energy-Storage Antiferroelectric PbZrO3储能反铁电PbZrO3中具有极化摆线阶的非常规瞬态相位ADVANCED MATERIALS
OAAI
ADVANCED MATERIALSIF26.8
OAAI分享收藏分享收藏Room-Temperature Symmetric Giant Positive and Negative Electrocaloric Effect in PbMg0.5W0.5O3 Antiferroelectric CeramicPbMg0.5W0.5O3反铁电陶瓷中的室温对称巨正负电热效应
PREAI
分享收藏Ferroelectricity and Antiferroelectricity of Doped Thin HfO2-Based Films掺杂HfO2-Based薄膜的铁电性和反铁电性ADVANCED MATERIALS
ADVANCED MATERIALSIF26.8
PREAI
分享收藏
查看更多内容