{"id":106994,"date":"2017-10-18T06:30:10","date_gmt":"2017-10-17T22:30:10","guid":{"rendered":"http:\/\/www.cailiaoniu.com\/?p=106994"},"modified":"2017-10-17T10:00:08","modified_gmt":"2017-10-17T02:00:08","slug":"%e5%8c%85%e4%bf%a1%e5%92%8c%e5%a7%9c%e9%b9%8fangew-chem-int-ed-%ef%bc%9a-gese%e5%92%8cagsbse2%e5%90%88%e9%87%91%e7%9a%84%e9%ab%98%e7%83%ad%e7%94%b5%e6%80%a7%e8%83%bd","status":"publish","type":"post","link":"http:\/\/www.cailiaoniu.com\/?p=106994","title":{"rendered":"\u5305\u4fe1\u548c&\u59dc\u9e4fAngew. Chem. Int. Ed.\uff1a GeSe\u548cAgSbSe2\u5408\u91d1\u7684\u9ad8\u70ed\u7535\u6027\u80fd"},"content":{"rendered":"

\u3010\u5f15\u8a00\u3011<\/strong><\/p>\n

\u8fd1\u5e74\u6765\uff0c\u968f\u7740\u793e\u4f1a\u7684\u53d1\u5c55\uff0c\u80fd\u6e90\u548c\u73af\u5883\u95ee\u9898\u5df2\u6210\u4e3a\u65b0\u4e16\u7eaa\u4eba\u7c7b\u9762\u4e34\u7684\u4e25\u5cfb\u6311\u6218\u3002\u70ed\u7535\u6750\u6599\u7531\u4e8e\u53ef\u4ee5\u76f4\u63a5\u5c06\u70ed\u80fd\u8f6c\u6362\u4e3a\u7535\u80fd\uff0c\u56e0\u6b64\uff0c\u4f5c\u4e3a\u6e05\u6d01\u548c\u53ef\u6301\u7eed\u80fd\u6e90\u6750\u6599\u88ab\u5e7f\u6cdb\u7814\u7a76\u3002\u6750\u6599\u7684\u70ed\u7535\u6027\u80fd\u53d6\u51b3\u4e8e\u4f18\u503cZT=S2<\/sup>\u03c3T\/\u03ba\uff0c\u5176\u4e2dS\u662fSeebeck\u7cfb\u6570\uff0c\u03c3\u662f\u7535\u5bfc\u7387\uff0cT\u662f\u7edd\u5bf9\u6e29\u5ea6\uff0c\u03ba\u662f\u70ed\u5bfc\u7387\u3002\u901a\u8fc7\u8c03\u8282\u529f\u7387\u56e0\u6570\uff08PF = S2<\/sup>\u03c3\uff09\uff0c\u51cf\u5c0f\u70ed\u5bfc\u7387\u53ef\u4ee5\u589e\u5927\u6750\u6599\u7684\u70ed\u7535\u4f18\u503cZT\u3002\u800c\u4f18\u5316\u8f7d\u6d41\u5b50\u6d53\u5ea6\u3001\u589e\u52a0\u5e26\u7b80\u5e76\u5ea6\uff08\u8c03\u8c10\u6676\u4f53\u7ed3\u6784\u5bf9\u79f0\u6027\u6216\u5e26\u6536\u655b\uff09\u548c\u5171\u632f\u63ba\u6742\u80fd\u7ea7\uff0c\u53ef\u4ee5\u63d0\u9ad8\u529f\u7387\u56e0\u6570\u3002\u5f15\u5165\u539f\u5b50\u5c3a\u5ea6\u7684\u7f3a\u9677\u3001\u7eb3\u7c73\u7ed3\u6784\u548c\u591a\u7ea7\u7ed3\u6784\u53ef\u4ee5\u964d\u4f4e\u70ed\u5bfc\u7387\u3002\u867d\u7136Bi2<\/sub>Te3<\/sub>\u548cPbTe\u57fa\u70ed\u7535\u6750\u6599\u5177\u6709\u8f83\u9ad8\u7684ZT\uff0c\u4f46\u662f\u5f00\u53d1\u5730\u7403\u542b\u91cf\u4e30\u5bcc\uff0c\u5143\u7d20\u6bd2\u6027\u8f83\u4f4e\u7684\u65b0\u578b\u70ed\u7535\u6750\u6599\u662f\u4ea7\u4e1a\u5316\u53d1\u5c55\u7684\u65b0\u8d8b\u52bf\u3002<\/p>\n

SnSe\u7531\u4e8e\u4f4e\u7684\u70ed\u5bfc\u7387\uff0c\u8f83\u9ad8\u7684\u70ed\u7535\u4f18\u503cZT\uff0c\u4f7f\u5176\u4f5c\u4e3a\u4e00\u79cd\u524d\u666f\u5e7f\u9614\u7684\u70ed\u7535\u8584\u819c\u6750\u6599\u53d7\u5230\u5e7f\u6cdb\u5173\u6ce8\u3002GeSe\u5ba4\u6e29\u4e0b\u6709\u7c7b\u4f3c\u7684\u5c42\u72b6\u659c\u65b9\u6676\u4f53\u7ed3\u6784\uff08Pnma\uff09\uff0c\u5728920-930 K\u65f6\u4f1a\u8f6c\u53d8\u4e3a\u7acb\u65b9\u7ed3\u6784\uff08Fm3(\u2014)m\uff09\u3002\u50cfSnSe\u3001GeSe\u3001GeTe\u57fa\u5316\u5408\u7269\u53caTAGS\u662f\u53e6\u4e00\u7c7bIV-VI\u5316\u5408\u7269\u9ad8\u6e29\u76f8\u53d8\u7684\u4f8b\u5b50\uff08\u4ece\u659c\u65b9\u516d\u9762\u4f53\u5230\u7acb\u65b9\u4f53\uff09\uff0c\u5df2\u88ab\u5b9e\u9a8c\u8bc1\u660e\u5177\u6709\u9ad8\u4e8e1.5\u7684ZT\u503c\u3002\u901a\u8fc7\u5bc6\u5ea6\u6cdb\u51fd\u7406\u8bba\uff08DFT\uff09\u8ba1\u7b97\u5f97\u51fa\uff0cGeSe\u63ba\u6742\u7684\u6700\u4f73\u7a7a\u7a74\u8f7d\u6d41\u5b50\u6d53\u5ea6\u4e3a5\u00d71019 <\/sup>cm-3<\/sup>\uff0c\u5728800 K\u503cZT\u503c\u53ef\u4ee5\u8fbe\u52302.5\uff0c\u4f18\u4e8eSnSe\u3002\u7136\u800c\uff0c\u5bf9\u4e8e\u591a\u6676GeSe\u8fdb\u884c\u5b9e\u9a8c\uff0c\u7531\u4e8e\u5176\u8f83\u4f4e\u7684\u8f7d\u6d41\u5b50\u6d53\u5ea6\uff0c\u5728700 K\u65f6\u5176ZT\u503c\u53ea\u67090.2\u3002\u539f\u5219\u4e0a\uff0c\u8f7d\u6d41\u5b50\u6d53\u5ea6\u5e94\u8be5\u901a\u8fc7\u5143\u7d20\u63ba\u6742\u6765\u8c03\u8282\uff0c\u4f46\u5b9e\u9645\u5b9e\u65bd\u56f0\u96be\u91cd\u91cd\u3002\u5305\u62ecCu\u3001Ag\u3001Na\u4ee5\u53caBi\u3001Sb\u3001La\u3001As\u7b49\u7684P\u578b\u63ba\u6742\u4ee5\u53caI\u7684 n\u578b\u63ba\u6742\uff0c\u5df2\u63ba\u5165GeSe\uff0c\u4f46Ag\u63ba\u6742\u7684\u6700\u5927\u8f7d\u6d41\u5b50\u6d53\u5ea6\u4e3a1018<\/sup> cm-3<\/sup>\uff0c\u4ecd\u7136\u4e0e\u7406\u60f3\u7684\u7406\u8bba\u8ba1\u7b97\u503c\u76f8\u5dee\u751a\u8fdc\u3002<\/p>\n

\u3010\u6210\u679c\u7b80\u4ecb\u3011<\/strong><\/p>\n

GeSe\u5c5e\u4e8eIV-VI\u65cf\u534a\u5bfc\u4f53\u6750\u6599\uff0c\u5177\u6709\u50cfPbTe\u548cSnSe\u4e00\u6837\u4f18\u826f\u7684\u70ed\u7535\u6027\u80fd\u3002\u6b63\u4ea4\u7684GeSe\u5df2\u7ecf\u4ece\u7406\u8bba\u4e0a\u8bc1\u660e\u5177\u6709\u826f\u597d\u7684\u70ed\u7535\u6027\u80fd\uff0c\u4f46\u5f88\u96be\u8fdb\u884c\u63ba\u6742\u5b9e\u9a8c\u3002\u50cfPbTe\u3001\u659c\u516d\u65b9\u7684GeTe\u90fd\u662f\u7406\u60f3\u7684\u70ed\u7535\u6750\u6599\uff0c\u5177\u6709\u591a\u8c37\u5e26\u7ed3\u6784\uff0cGe\u4f4d\u5b58\u5728\u5927\u91cf\u7a7a\u7a74\uff0c\u80fd\u591f\u63d0\u4f9b\u8db3\u591f\u7684\u8f7d\u6d41\u5b50\u3002\u6700\u8fd1\uff0c\u4e2d\u79d1\u9662\u5927\u8fde\u5316\u5b66\u7269\u7406\u7814\u7a76\u6240\u5305\u4fe1\u548c\u9662\u58eb\u548c\u59dc\u9e4f\u7814\u7a76\u5458<\/strong>\uff08\u5171\u540c\u901a\u8baf\u4f5c\u8005\uff09\u7814\u7a76\u4e86GeSe\u4e0eAgSbSe2<\/sub>\u5408\u91d1\u5316\u7684\u70ed\u7535\u6027\u80fd\uff0c\u8be5\u6750\u6599\u4e0d\u4ec5\u5177\u6709\u8f83\u9ad8\u5bf9\u79f0\u6027\u7684\u65b0\u83f1\u5f62\u7ed3\u6784\uff0c\u540c\u65f6\u4ea7\u751f\u4e86\u4e00\u4e2a\u591a\u8c37\u5e26\u8d39\u7c73\u9762\u4e14\u8f7d\u6d41\u5b50\u6d53\u5ea6\u6025\u5267\u589e\u52a0\u3002\u5728710K\u65f6\uff0cGeAg0.2<\/sub>Sb0.2<\/sub>Se1.4<\/sub>\u7684\u4f18\u503c\uff08ZT\uff09\u8fbe\u52300.86\uff0c\u662f\u539fGeSe\u768418\u500d\u591a\uff0c\u63ba\u6742\u659c\u65b9GeSe\u76844\u500d\u591a\u3002\u8be5\u7814\u7a76\u5229\u7528\u9ad8\u5bf9\u79f0\u5408\u91d1\u7684\u71b5\u7a33\u5b9a\u7279\u6027\u63d0\u9ad8\u6750\u6599\u7684\u70ed\u7535\u6027\u80fd\uff0c\u4e3a\u4ee5\u540e\u901a\u8fc7\u6676\u4f53\u76f8\u5de5\u7a0b\u5f00\u53d1\u65b0\u578b\u70ed\u7535\u6750\u6599\u5f00\u8f9f\u4e86\u65b0\u7684\u9014\u5f84\u3002<\/p>\n

\u3010\u56fe\u6587\u5bfc\u8bfb\u3011<\/strong><\/p>\n

\u56fe<\/strong>1 GeAgx<\/sub><\/em>Sbx<\/sub><\/em>Se1+2x<\/em><\/sub>\u00a0(x <\/em>= 0, 0.05, 0.1, 0.15, 0.2, 0.3)<\/strong>\u6837\u54c1\u7684<\/strong>XRD<\/strong>\u56fe\u8c31<\/strong><\/p>\n

\u00a0\"\"<\/strong><\/p>\n

a)\u200530\u00b0\u523035\u00b0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0<\/p>\n

b) 43\u00b0\u523048\u00b0<\/p>\n

\u00a0<\/strong>\u56fe<\/strong>2 GeSe<\/strong>\u7ed3\u6784\u53ca<\/strong>GeAg0.2<\/sub>Sb0.2<\/sub>Se1.4<\/sub><\/strong>\u7ed3\u6784\u8868\u5f81<\/strong><\/p>\n

\"\"<\/p>\n

a) GeSe\u7684\u6b63\u4ea4\uff0c\u659c\u516d\u65b9\u548c\u7acb\u65b9\u6676\u4f53\u7ed3\u6784<\/p>\n

b) \u539f\u4f4dGeSe\u7684HAADF\u56fe<\/p>\n

c) GeAg2<\/sub>Sb0.2<\/sub>Se1.4<\/sub> [001]\u65b9\u5411\u7684HAADF\u56fe<\/p>\n

d) GeSe\u7684SAED\u56fe<\/p>\n

e) GeAg2<\/sub>Sb0.2<\/sub>Se1.4<\/sub>\u7684SAED\u56fe<\/p>\n

\u00a0<\/strong>\u56fe<\/strong>3 GeSe<\/strong>\u4e0e<\/strong>AgSbSe2<\/sub><\/strong>\u5408\u91d1\u53ef\u80fd\u7684\u76f8\u56fe\u793a\u610f\u56fe<\/strong><\/p>\n

\"\"<\/strong><\/p>\n

\u56fe<\/strong>4 GeSe<\/strong>\u80fd\u5e26\u7ed3\u6784<\/strong><\/p>\n

\"\"<\/p>\n

a)\u8ba1\u7b97\u7684\u7535\u5b50\u80fd\u5e26\u7ed3\u6784\u548c\u6001\u5bc6\u5ea6<\/p>\n

b)\u2005\u9ad8\u5bf9\u79f0\u70b9\u5e03\u91cc\u6e0a\u533a<\/p>\n

c)\u2005\u659c\u516d\u65b9\u7684GeSe\u76842\u00d71020<\/sup>\u2005cm\u22123<\/sup>\u8d39\u7c73\u9762<\/p>\n

\u56fe<\/strong>5 <\/strong>\u6837\u54c1\u70ed\u7535\u6027\u80fd\u8868\u5f81<\/strong><\/p>\n

\"\"<\/p>\n

GeAgx<\/sub><\/em>Sbx<\/sub><\/em>Se1+2x<\/em><\/sub>, GeAgy<\/sub><\/em>Se1+y<\/em><\/sub>\u548cGeSbz<\/sub><\/em>Se1+z<\/em><\/sub>\u6837\u54c1\u7684a)\u970d\u5c14\u8f7d\u6d41\u5b50\u6d53\u5ea6\u548cb)\u8fc1\u79fb\u7387\u4e0eM<\/em>\uff08<\/em>M=x,y,z<\/em>\uff09<\/em>\u7684\u5173\u7cfb\u56fe<\/p>\n

GeAgx<\/sub><\/em>Sbx<\/sub><\/em>Se1+2x<\/em><\/sub>\u00a0(x<\/em>=0, 0.05, 0.1, 0.15, 0.2, 0.3)\u5408\u91d1\u7684 c)\u2005\u7535\u5bfc\u7387\uff0cd)\u2005Seebeck\u7cfb\u6570\uff0ce)\u2005\u603b\u70ed\u5bfc\u7387\u548cf)\u2005\u6676\u683c\u70ed\u5bfc\u7387\u968fT\u7684\u53d8\u5316\u5173\u7cfb\u56fe<\/p>\n

\u56fe<\/strong>6 GeAgx<\/sub><\/em>Sbx<\/sub><\/em>Se1+2x<\/em><\/sub>\u00a0(x<\/em>=0, 0.05, 0.1, 0.15, 0.2, 0.3) <\/strong>\u6837\u54c1<\/strong>ZT<\/strong>\u503c\u4e0e\u6e29\u5ea6\u7684\u53d8\u5316\u66f2\u7ebf<\/strong><\/p>\n

\"\"<\/p>\n

GeAgx<\/sub><\/em>Sbx<\/sub><\/em>Se1+2x<\/em><\/sub>\u00a0(x<\/em>=0, 0.05, 0.1, 0.15, 0.2, 0.3) \u6837\u54c1ZT\u503c\u4e0e\u6e29\u5ea6\u7684\u53d8\u5316\u66f2\u7ebf\uff08\u586b\u5145\u7b26\u53f7\u548c\u5b9e\u7ebf\uff09\u548c\u6700\u5927\u53ef\u80fd\u7684ZT\u52a0\u6743\u79fb\u52a8\u6a21\u578b\uff08\u7a7a\u5fc3\u7b26\u53f7\u548c\u865a\u7ebf\uff09<\/p>\n

\u3010\u5c0f\u7ed3<\/strong>\u3011<\/p>\n

\u901a\u8fc7DFT\u8ba1\u7b97\u867d\u7136\u5df2\u7ecf\u9884\u6d4b\u5230\u6b63\u4ea4GeSe\u6709\u4e00\u4e2a\u9ad8\u7684ZT\u503c\uff0c\u4f46\u7531\u4e8e\u8c03\u6574\u8f7d\u6d41\u5b50\u6d53\u5ea6\u96be\u5ea6\u5f88\u5927\uff0c\u5b9e\u9a8c\u4e0a\u5c1a\u672a\u5b9e\u73b0\u3002\u901a\u8fc7GeSe\u4e0eAgSbSe2<\/sub>\u5408\u91d1\uff0c\u5728\u5ba4\u6e29\u4e0b\u5f62\u6210\u7a33\u5b9a\u7684\u65b0\u83f1\u65b9\u76f8\uff0c\u662f\u9ad8\u5bf9\u79f0\u5408\u91d1\u71b5\u7a33\u5b9a\u7684\u4e00\u4e2a\u4f8b\u5b50\u3002\u7531\u4e8eGe\u7a7a\u4f4d\uff0c\u83f1\u5f62\u76f8\u7684GeSe\u50cf\u83f1\u5f62\u7684GeTe\u4e00\u6837\u5177\u6709\u9ad8\u7684\u8f7d\u6d41\u5b50\u6d53\u5ea6\u3002\u4e00\u4e2a\u6709\u6548\u7684\u8d28\u91cf\u6a21\u578b\u8868\u660e\u83f1\u9762\u4f53\u6837\u54c1\u7684\u8f7d\u6d41\u5b50\u6d53\u5ea6\u975e\u5e38\u63a5\u8fd1\u6700\u4f73\u503c\u3002\u7ed3\u5408\u9ad8\u8f7d\u6d41\u5b50\u6d53\u5ea6\uff0c\u4e0e\u6b63\u4ea4\u6676\u7cfb\u76f8\u6bd4\uff0c\u83f1\u9762\u4f53\u76f8\u7531\u4e8e\u8f83\u9ad8\u7684\u5bf9\u79f0\u6027\uff0c\u5177\u6709\u8d39\u7c73\u9762\uff0c\u6709\u5229\u4e8e\u70ed\u7535\u6027\u80fd\u7684\u63d0\u9ad8\u3002\u7531\u4e8e\u9ad8\u7684\u8f7d\u6d41\u5b50\u6d53\u5ea6\u548c\u4f4e\u7684\u6676\u683c\u70ed\u5bfc\u7387\uff0c\u5728710 K\u65f6GeAg0.2<\/sub>Sb0.2<\/sub>Se1.4<\/sub>\u5408\u91d1\u7684ZT\u503c\u8fbe\u5230\u4e860.86\u3002<\/p>\n

\u6587\u732e\u94fe\u63a5\uff1a<\/strong>High Thermoelectric Performance of New Rhombohedral Phase of GeSe stabilized through Alloying with AgSbSe2<\/sub><\/a>\u00a0(Angew. Chem. Int. Ed.2017, DOI: 10.1002\/anie.201708134)<\/p>\n

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