Strain-Induced Medium-Temperature Thermoelectric Performance of Cu4TiSe4 : The Role of Four-Phonon Scattering

声子 散射 声子散射 凝聚态物理 热导率 材料科学 塞贝克系数 玻尔兹曼方程 功勋 热电效应 物理 热力学 光学 光电子学
作者
Xue-Kun Chen,Enming Zhang,Dan Wu,Ke‐Qiu Chen
出处
期刊:Physical review applied [American Physical Society]
卷期号:19 (4) 被引量:95
标识
DOI:10.1103/physrevapplied.19.044052
摘要

Motivated by the synthesized ${\mathrm{Cu}}_{4}{\mathrm{Ti}\mathrm{Se}}_{4}$ with ultralow room-temperature thermal conductivity [Angew. Chem., Int. Ed. 60, 9106 (2021)], we systematically investigate its thermoelectric (TE) properties via combining Boltzmann transport equations and first-principles calculations. The results show that the thermal conductivity of ${\mathrm{Cu}}_{4}{\mathrm{Ti}\mathrm{Se}}_{4}$ determined considering only three-phonon scattering is reduced by about 40% after including four-phonon scattering at room temperature, indicating the importance of four-phonon scattering in phonon transport. On the other hand, the coexistence of high dispersion and valley degeneracy at the top valence band in the electronic structure causes a high power factor. Consequently, the isotropic figure of merit (ZT) value of 1.5 at 500 K is captured in the p-type doped ${\mathrm{Cu}}_{4}{\mathrm{Ti}\mathrm{Se}}_{4}$. In addition, the value of ZT can be further enhanced to 2.2 by applying 2.25% triaxial tensile strain, which is ascribed to the remarkably enhanced four-phonon scattering processes induced by the tensile strain. Meanwhile, the significant suppression of thermal conductivity allows the optimal carrier concentration for the ZT peak to be reduced, which is of important practical significance for the experimental preparation of ${\mathrm{Cu}}_{4}{\mathrm{Ti}\mathrm{Se}}_{4}$-based TE devices. Our results pave a way for the design of adjustable medium-temperature TE devices.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
彩色靖儿完成签到 ,获得积分10
1秒前
田様应助JULY采纳,获得10
2秒前
2秒前
llly完成签到,获得积分10
2秒前
qijia发布了新的文献求助30
2秒前
Steven发布了新的文献求助10
3秒前
Akim应助echo采纳,获得10
3秒前
yydragen应助echo采纳,获得10
3秒前
充电宝应助echo采纳,获得10
3秒前
ding应助echo采纳,获得10
3秒前
香蕉觅云应助123采纳,获得10
3秒前
郭文汇发布了新的文献求助50
5秒前
roclie发布了新的文献求助10
7秒前
May应助bianlllll采纳,获得20
7秒前
自渡完成签到 ,获得积分10
7秒前
SciGPT应助浪吃采纳,获得10
12秒前
风筝与亭完成签到 ,获得积分10
14秒前
hecheng完成签到,获得积分10
14秒前
17秒前
niulugai完成签到,获得积分10
19秒前
19秒前
在水一方应助科研通管家采纳,获得10
21秒前
闪闪山水应助科研通管家采纳,获得10
21秒前
ED应助科研通管家采纳,获得10
22秒前
小马甲应助科研通管家采纳,获得20
22秒前
22秒前
闪闪山水应助科研通管家采纳,获得10
22秒前
东山小红应助科研通管家采纳,获得10
22秒前
24秒前
量子星尘发布了新的文献求助10
25秒前
26秒前
欣慰的舞仙完成签到,获得积分10
26秒前
希望天下0贩的0应助夏夏采纳,获得10
28秒前
29秒前
ABCofMEDICIBE发布了新的文献求助10
30秒前
枫叶荻花秋瑟瑟完成签到,获得积分10
31秒前
爆米花应助呵呵你个头采纳,获得10
32秒前
刘迪发布了新的文献求助10
32秒前
易川完成签到,获得积分10
32秒前
静文发布了新的文献求助10
34秒前
高分求助中
Ophthalmic Equipment Market by Devices(surgical: vitreorentinal,IOLs,OVDs,contact lens,RGP lens,backflush,diagnostic&monitoring:OCT,actorefractor,keratometer,tonometer,ophthalmoscpe,OVD), End User,Buying Criteria-Global Forecast to2029 2000
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Cognitive Neuroscience: The Biology of the Mind (Sixth Edition) 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 588
Christian Women in Chinese Society: The Anglican Story 500
A Preliminary Study on Correlation Between Independent Components of Facial Thermal Images and Subjective Assessment of Chronic Stress 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3961022
求助须知:如何正确求助?哪些是违规求助? 3507251
关于积分的说明 11134887
捐赠科研通 3239661
什么是DOI,文献DOI怎么找? 1790309
邀请新用户注册赠送积分活动 872341
科研通“疑难数据库(出版商)”最低求助积分说明 803150