Negative/Positive Electrocaloric Effect in Single-Layer Pb(ZrxTi1-x)O3 Thin Films for Solid-State Cooling Device

被引：7
作者：
Prasad, Sankar [1 ]
Hou, Xu [1 ]
Zhang, Jingtong [1 ]
Wu, Shuanghao [2 ]
Wang, Jie [1 ,3 ]
机构：
[1] Zhejiang Univ, Sch Aeronaut & Astronaut, Dept Engn Mech, Hangzhou 310027, Peoples R China
[2] Tongji Univ, Funct Mat Res Lab, Sch Mat Sci & Engn, Key Lab Adv Civil Engn Mat,Minist Educ, Shanghai 201804, Peoples R China
[3] Zhejiang Univ, Key Lab Soft Machines & Smart Devices, Hangzhou 310027, Peoples R China
来源：
IEEE TRANSACTIONS ON ELECTRON DEVICES | 2020年 / 67卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Adiabatic temperature change (ATC); dielectric properties; electrocaloric effect (ECE); morphotropic phase boundary (MPB); Pb(ZrxTi1-x)O-3 (PZT) thin films; ELECTRICAL-PROPERTIES; PHASE-TRANSITION; LEAD; PZT; NANOCOMPOSITES; THICKNESS; EFFICIENT;
D O I：
10.1109/TED.2020.2976163
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Ferroelectric perovskite materials are crucial candidates for the solid-state cooling devices due to their distinguished electrocaloric effect (ECE). Here we report the coexistence of negative and positive ECE in sol-gel derived single-layer (SL) Pb(ZrxTi1-xO3 (PZT) thin films with a composition close to the morphotropic phase boundary (MPB). A negative ECE of T = 1.81 K at 135 degrees C and positive ECE of T = 0.64 K at 40 degrees C under an applied electric field of 374 kV cm(-1) are achieved. Such appearance of negative and positive ECE at different temperatures is attributed to the transition from rhombohedral to tetragonal phase and associated with the effect of defect dipoles in SL-PZT thin films at MPB.
引用
收藏
页码：1769 / 1775
页数：7
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