{"id":21024,"date":"2020-01-08T00:10:46","date_gmt":"2020-01-07T16:10:46","guid":{"rendered":"https:\/newsletter.sinica.edu.tw\/?p=21024"},"modified":"2021-07-22T14:17:21","modified_gmt":"2021-07-22T06:17:21","slug":"%e7%89%a9%e7%90%86%e6%89%80%e9%80%9a%e4%bf%97%e6%bc%94%e8%ac%9b%ef%bc%9alow-thermal-conductivity-in-thermoelectric-materials-and-high-thermal-conductivity-in-boron-arsenide","status":"publish","type":"post","link":"https:\/newsletter.sinica.edu.tw\/21024\/","title":{"rendered":"\u7269\u7406\u6240\u901a\u4fd7\u6f14\u8b1b\uff1aLow Thermal Conductivity in Thermoelectric Materials and High Thermal Conductivity in Boron Arsenide"},"content":{"rendered":"<p>\u6f14\u8b1b\u4eba\uff1a\u4efb\u5fd7\u92d2\u6559\u6388\uff08\u7f8e\u570b\u4f11\u58eb\u9813\u5927\u5b78\uff09<\/p>\n<p>\u4e3b\u6301\u4eba\uff1a\u9673\u6d0b\u5143\u7814\u7a76\u54e1\uff08\u672c\u9662\u7269\u7406\u7814\u7a76\u6240\uff09<\/p>\n<p>\u6642\u9593\uff1a109\u5e741\u670810\u65e5\uff08\u661f\u671f\u4e94\uff0910:00<\/p>\n<p>\u5730\u9ede\uff1a\u672c\u9662\u7269\u7406\u7814\u7a76\u62405\u6a13\u7b2c\u4e00\u6703\u8b70\u5ba4<\/p>\n<p>\u6458\u8981\uff1a<\/p>\n<p>Bi<sub>2<\/sub>Te<sub>3<\/sub>-based p-type Bi<sub>0.5<\/sub>Sb<sub>1.5<\/sub>Te<sub>3<\/sub> and n-type Bi<sub>2<\/sub>Te<sub>2.7<\/sub>Se<sub>3<\/sub> have been the only materials for thermoelectric cooling for decades. Even though the progress on advancing the thermoelectric figure-of-merit (ZT) has been significant especially the materials with peak ZT at high temperatures, materials with high enough ZT around room temperature are very rare. Up to now, in addition to Bi<sub>2<\/sub>Te<sub>3<\/sub>-based ones, the only reported is p-type MgAgSb with ZT of ~0.8 at room temperature. There is rare report on any n-type material exhibiting ZT similar to that of the n-type Bi<sub>2<\/sub>Te<sub>2.7<\/sub>Se<sub>3<\/sub>. In this talk, Dr.Ren will present a new n-type material that has a ZT of ~0.7 at room temperature, which is comparable to that of n-type Bi<sub>2<\/sub>Te<sub>2.7<\/sub>Se<sub>3<\/sub>. The cooling performance of a unicouple consisting of the new n-type material and the p-type Bi<sub>0.5<\/sub>Sb<sub>1.5<\/sub>Te<sub>3<\/sub> is also in par with the commercial legs consisting of the p-type Bi<sub>0.5<\/sub>Sb<sub>1.5<\/sub>Te<sub>3<\/sub> and n-type Bi<sub>2<\/sub>Te<sub>2.7<\/sub>Se<sub>3<\/sub>. In addition, Dr.Ren will also discuss the recent progress on realizing thermal conductivity above 1200 W m<sup>-1<\/sup> K<sup>-1<\/sup> at room temperature in Boron Arsenide single crystals.<\/p>\n<p>\u8a3b\uff1a\u672c\u6f14\u8b1b\u5c07\u4ee5\u82f1\u6587\u9032\u884c<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-21025\" src=\"https:\/newsletter.sinica.edu.tw\/wp-content\/uploads\/2020\/01\/2-1.jpg\" alt=\"\" width=\"587\" height=\"830\" \/><\/p>\n<p style=\"text-align: right;\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \uff08\u7269\u7406\u7814\u7a76\u6240\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6642\u3000\u9593\uff1a109\u5e741\u670810\u65e5\uff08\u661f\u671f\u4e94\uff0910:00<br \/>\n\u5730\u3000\u9ede\uff1a\u672c\u9662\u7269\u7406\u62405\u6a13\u7b2c\u4e00\u6703\u8b70\u5ba4<\/p>\n","protected":false},"author":1,"featured_media":21171,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[5],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/newsletter.sinica.edu.tw\/wp-json\/wp\/v2\/posts\/21024"}],"collection":[{"href":"https:\/newsletter.sinica.edu.tw\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/newsletter.sinica.edu.tw\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/newsletter.sinica.edu.tw\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/newsletter.sinica.edu.tw\/wp-json\/wp\/v2\/comments?post=21024"}],"version-history":[{"count":2,"href":"https:\/newsletter.sinica.edu.tw\/wp-json\/wp\/v2\/posts\/21024\/revisions"}],"predecessor-version":[{"id":21146,"href":"https:\/newsletter.sinica.edu.tw\/wp-json\/wp\/v2\/posts\/21024\/revisions\/21146"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/newsletter.sinica.edu.tw\/wp-json\/wp\/v2\/media\/21171"}],"wp:attachment":[{"href":"https:\/newsletter.sinica.edu.tw\/wp-json\/wp\/v2\/media?parent=21024"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/newsletter.sinica.edu.tw\/wp-json\/wp\/v2\/categories?post=21024"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/newsletter.sinica.edu.tw\/wp-json\/wp\/v2\/tags?post=21024"}],"curies":[{"name":"wp","href":"https:\/api.w.org\/{rel}","templated":true}]}}