Room-Temperature Electrocaloric Effect in Layered Ferroelectric CuInP2S6 for Solid-State Refrigeration

Si, Mengwei; Saha, Atanu K.; Liao, Pai -Ying; Gao, Shengjie; Neumayer, Sabine M.; Jian, Jie; Qin, Jingkai; Wisinger, Nina Balke; Wang, Haiyan; Maksymovych, Petro; Wu, Wenzhuo; Gupta, Sumeet K.; Ye, Peide D.

doi:10.1021/acsnano.9b01491

Title: Room-Temperature Electrocaloric Effect in Layered Ferroelectric CuInP₂S₆ for Solid-State Refrigeration

Journal Article · 02 August 2019 · ACS Nano

DOI: https://doi.org/10.1021/acsnano.9b01491 · OSTI ID:1560477

^[1]; Saha, Atanu K. ^[1]; Liao, Pai -Ying ^[1]; Gao, Shengjie ^[1];

^[2]; Jian, Jie ^[1]; Qin, Jingkai ^[1];

^[2];

^[1]; Maksymovych, Petro ^[2];

^[1]; Gupta, Sumeet K. ^[1];

^[1]

Purdue Univ., West Lafayette, IN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

A material with reversible temperature change capability under an external electric field, known as the electrocaloric effect (ECE), has long been considered as a promising solid-state cooling solution. However, electrocaloric (EC) performance of EC materials generally is not sufficiently high for real cooling applications. As a result, exploring EC materials with high performance is of great interest and importance. Here, we report on the ECE of ferroelectric materials with van der Waals layered structure (CuInP2S6 or CIPS in this work in particular). Over 60% polarization charge change is observed within a temperature change of only 10 K at Curie temperature. Large adiabatic temperature change (|ΔT|) of 3.3 K and isothermal entropy change (|ΔS|) of 5.8 J kg^–1 K^–1 at |ΔE| = 142.0 kV cm^–1 and at 315 K (above and near room temperature) are achieved, with a large EC strength (|ΔT|/|ΔE|) of 29.5 mK cm kV^–1. Furthermore, the ECE of CIPS is also investigated theoretically by numerical simulation, and a further EC performance projection is provided.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1560477

Journal Information:: ACS Nano, Vol. 13, Issue 8; ISSN 1936-0851

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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