کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7934598 | 1512939 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synergistically optimizing electrical and thermal transport properties of n-type PbSe
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this paper, we report that the thermoelectric performance of n-type PbSe could be improved through synergistically optimizing electrical and thermal transport properties via Sb doping and Mg alloying. The carrier concentration was firstly optimized through Sb doping, resulting in a maximum power factor of ~ 15.4â¯Î¼Wâ¯cmâ1 Kâ2 and maximum ZT of ~ 0.9 at 873â¯K in Pb0.99Sb0.01Se. Then, Mg was selected for alloying in Pb sites to produce point defects, which can largely intensify the phonon scattering and lower thermal conductivity. After Mg alloying, the thermal conductivity at 300â¯K (873â¯K) was significantly suppressed from ~ 4.6â¯Wmâ1 Kâ1 (1.5â¯Wmâ1 Kâ1) for Pb0.99Sb0.01Se to ~ 2.9â¯Wmâ1 Kâ1 (1.1â¯Wmâ1 Kâ1) for Pb0.99Sb0.01Se-6%MgSe. Through combining Sb doping and Mg alloying, a maximum ZT of ~ 1.1 was achieved at 873â¯K for Pb0.99Sb0.01Se-6%MgSe, and the average ZT (ZTave) was increased by 28.6% from ~ 0.42 for Pb0.99Sb0.01Se to ~ 0.54 for Pb0.99Sb0.01Se-6%MgSe. The results indicate that PbSe is a robust candidate for medium-temperature thermoelectric applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Natural Science: Materials International - Volume 28, Issue 3, June 2018, Pages 275-280
Journal: Progress in Natural Science: Materials International - Volume 28, Issue 3, June 2018, Pages 275-280
نویسندگان
Xin Qian, Yu Xiao, Cheng Chang, Lei Zheng, Lidong Zhao,