Giant room-temperature negative electrocaloric effect in Ce-modified PbZrO3 antiferroelectric thin films

Junjie Xiong; Mei Bai; Junbo Xu; Yiming Zhao; Luocheng Liao; Junwen Mei; Yangfei Gao; Wenjing Qiao; Jiantuo Zhao; Yunya Liu; Xiaoliang Chen; Zhongliang Lu; Ruirui Kang; Xiaojie Lou

doi:10.1016/j.ceramint.2025.05.095

Giant room-temperature negative electrocaloric effect in Ce-modified PbZrO₃ antiferroelectric thin films

Junjie Xiong
, Mei Bai
, Junbo Xu
, Yiming Zhao
, Luocheng Liao
, Junwen Mei
, Yangfei Gao
, Wenjing Qiao
, Jiantuo Zhao
, Yunya Liu
, Xiaoliang Chen
, Zhongliang Lu
, Ruirui Kang
, Xiaojie Lou

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The ongoing miniaturization of electronic devices has driven an urgent demand for advanced solid-state refrigeration technologies. The negative electrocaloric effect (NECE) exhibited by antiferroelectric (AFE) materials presents a promising cooling solution, yet its performance requires further optimization. In this work, a series of PbZrO₃-based thin films with varying Ce concentrations (0–8 mol%, abbreviated as PCZ-100x) were fabricated on Pt(111)/Ti/SiO₂/Si substrates using a sol-gel method to enhance NECE. Comprehensive structural, dielectric, and polarization characterizations demonstrated that moderate Ce doping effectively stabilizes the AFE phase and increase polarization response. As a result, PCZ-6 film exhibits exceptional NECE at room-temperature including a giant isothermal entropy change (ΔS = 25.46 J K⁻¹ kg⁻¹) and a remarkable adiabatic temperature variation (ΔT = −23.54 K) at 350 kV/cm. This work offers a promising pathway for the development of efficient cooling materials.

Original language	English
Pages (from-to)	33646-33652
Number of pages	7
Journal	Ceramics International
Volume	51
Issue number	21
DOIs	https://doi.org/10.1016/j.ceramint.2025.05.095
State	Published - Sep 2025

Keywords

Antiferroelectric films
Negative electrocaloric effect
PbZrO
Phase transition
Sol-gel

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10.1016/j.ceramint.2025.05.095

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@article{5770f724ae9d4037a0e8490a278fcd48,

title = "Giant room-temperature negative electrocaloric effect in Ce-modified PbZrO3 antiferroelectric thin films",

abstract = "The ongoing miniaturization of electronic devices has driven an urgent demand for advanced solid-state refrigeration technologies. The negative electrocaloric effect (NECE) exhibited by antiferroelectric (AFE) materials presents a promising cooling solution, yet its performance requires further optimization. In this work, a series of PbZrO3-based thin films with varying Ce concentrations (0–8 mol\%, abbreviated as PCZ-100x) were fabricated on Pt(111)/Ti/SiO2/Si substrates using a sol-gel method to enhance NECE. Comprehensive structural, dielectric, and polarization characterizations demonstrated that moderate Ce doping effectively stabilizes the AFE phase and increase polarization response. As a result, PCZ-6 film exhibits exceptional NECE at room-temperature including a giant isothermal entropy change (ΔS = 25.46 J K−1 kg−1) and a remarkable adiabatic temperature variation (ΔT = −23.54 K) at 350 kV/cm. This work offers a promising pathway for the development of efficient cooling materials.",

keywords = "Antiferroelectric films, Negative electrocaloric effect, PbZrO, Phase transition, Sol-gel",

author = "Junjie Xiong and Mei Bai and Junbo Xu and Yiming Zhao and Luocheng Liao and Junwen Mei and Yangfei Gao and Wenjing Qiao and Jiantuo Zhao and Yunya Liu and Xiaoliang Chen and Zhongliang Lu and Ruirui Kang and Xiaojie Lou",

note = "Publisher Copyright: {\textcopyright} 2025 Elsevier Ltd and Techna Group S.r.l.",

year = "2025",

month = sep,

doi = "10.1016/j.ceramint.2025.05.095",

language = "英语",

volume = "51",

pages = "33646--33652",

journal = "Ceramics International",

issn = "0272-8842",

publisher = "Elsevier Ltd",

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TY - JOUR

T1 - Giant room-temperature negative electrocaloric effect in Ce-modified PbZrO3 antiferroelectric thin films

AU - Xiong, Junjie

AU - Bai, Mei

AU - Xu, Junbo

AU - Zhao, Yiming

AU - Liao, Luocheng

AU - Mei, Junwen

AU - Gao, Yangfei

AU - Qiao, Wenjing

AU - Zhao, Jiantuo

AU - Liu, Yunya

AU - Chen, Xiaoliang

AU - Lu, Zhongliang

AU - Kang, Ruirui

AU - Lou, Xiaojie

PY - 2025/9

Y1 - 2025/9

N2 - The ongoing miniaturization of electronic devices has driven an urgent demand for advanced solid-state refrigeration technologies. The negative electrocaloric effect (NECE) exhibited by antiferroelectric (AFE) materials presents a promising cooling solution, yet its performance requires further optimization. In this work, a series of PbZrO3-based thin films with varying Ce concentrations (0–8 mol%, abbreviated as PCZ-100x) were fabricated on Pt(111)/Ti/SiO2/Si substrates using a sol-gel method to enhance NECE. Comprehensive structural, dielectric, and polarization characterizations demonstrated that moderate Ce doping effectively stabilizes the AFE phase and increase polarization response. As a result, PCZ-6 film exhibits exceptional NECE at room-temperature including a giant isothermal entropy change (ΔS = 25.46 J K−1 kg−1) and a remarkable adiabatic temperature variation (ΔT = −23.54 K) at 350 kV/cm. This work offers a promising pathway for the development of efficient cooling materials.

AB - The ongoing miniaturization of electronic devices has driven an urgent demand for advanced solid-state refrigeration technologies. The negative electrocaloric effect (NECE) exhibited by antiferroelectric (AFE) materials presents a promising cooling solution, yet its performance requires further optimization. In this work, a series of PbZrO3-based thin films with varying Ce concentrations (0–8 mol%, abbreviated as PCZ-100x) were fabricated on Pt(111)/Ti/SiO2/Si substrates using a sol-gel method to enhance NECE. Comprehensive structural, dielectric, and polarization characterizations demonstrated that moderate Ce doping effectively stabilizes the AFE phase and increase polarization response. As a result, PCZ-6 film exhibits exceptional NECE at room-temperature including a giant isothermal entropy change (ΔS = 25.46 J K−1 kg−1) and a remarkable adiabatic temperature variation (ΔT = −23.54 K) at 350 kV/cm. This work offers a promising pathway for the development of efficient cooling materials.

KW - Antiferroelectric films

KW - Negative electrocaloric effect

KW - PbZrO

KW - Phase transition

KW - Sol-gel

UR - https://www.scopus.com/pages/publications/105005505954

U2 - 10.1016/j.ceramint.2025.05.095

DO - 10.1016/j.ceramint.2025.05.095

M3 - 文章

AN - SCOPUS:105005505954

SN - 0272-8842

VL - 51

SP - 33646

EP - 33652

JO - Ceramics International

JF - Ceramics International

IS - 21

ER -

Giant room-temperature negative electrocaloric effect in Ce-modified PbZrO₃ antiferroelectric thin films

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Keywords

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