{"id":36928,"date":"2016-08-28T14:00:07","date_gmt":"2016-08-28T06:00:07","guid":{"rendered":"\/\/m.iemloyee.com\/?p=36928"},"modified":"2016-08-28T10:28:04","modified_gmt":"2016-08-28T02:28:04","slug":"nat-commun-%e5%8e%9f%e5%ad%90%e7%ba%a7%e5%8e%9a%e5%ba%a6mos2ws2%e5%bc%82%e8%b4%a8%e7%bb%93%e4%b8%ad%e5%b1%82%e9%97%b4%e7%83%ad%e6%bf%80%e5%ad%90%e7%9a%84%e8%b6%85%e5%bf%ab%e5%bd%a2%e6%88%90","status":"publish","type":"post","link":"\/\/m.iemloyee.com\/?p=36928","title":{"rendered":"Nat. Commun. \u539f\u5b50\u7ea7\u539a\u5ea6MoS2\/WS2\u5f02\u8d28\u7ed3\u4e2d\u5c42\u95f4\u70ed\u6fc0\u5b50\u7684\u8d85\u5feb\u5f62\u6210"},"content":{"rendered":"

\u6700\u8fd1\uff0c\u7531\u4e8c\u7ef4\u8fc7\u6e21\u91d1\u5c5e\u786b\u5316\u7269\u5c42\u7ec4\u6210\u7684\u8303\u5fb7\u74e6\u5c14\u65af\u5f02\u8d28\u7ed3\uff0c\u4f5c\u4e3a\u4e00\u7c7b\u65b0\u6750\u6599\u6210\u4e3a\u79d1\u5b66\u5bb6\u7684\u7814\u7a76\u70ed\u70b9\u3002\u5176\u5177\u6709\u539f\u5b50\u7ea7\u539a\u5ea6\u3001\u4f18\u5f02\u7684\u5149\u7535\u7279\u6027\u548c\u5149\u4f0f\u7279\u6027\uff0c\u5728\u5149\u7535\u5668\u4ef6\u548c\u5149\u4f0f\u9886\u57df\u6709\u7740\u5de8\u5927\u7684\u5e94\u7528\u6f5c\u529b\u3002\u4ee4\u4eba\u4e0d\u89e3\u7684\u662f\uff0c\u5728\u8fd9\u4e9b\u7ed3\u6784\u4e2d\uff0c\u5c3d\u5728\u7535\u8377\u8f93\u8fd0\u8fc7\u7a0b\u4e2d\uff0c\u5c42\u95f4\u6fc0\u5b50\u4e4b\u95f4\u7684\u8f6c\u53d8\u5b58\u5728\u7740\u660e\u663e\u7684\u52a8\u91cf\u4e0d\u5339\u914d\uff0c\u4f46\u662f\u5176\u5149\u7535\u6d41\u4ea7\u751f\u6548\u7387\u7f3a\u975e\u5e38\u4e4b\u9ad8\u3002<\/p>\n

\u4e3a\u4e86\u89e3\u51b3\u4e0a\u9762\u7684\u73b0\u8c61\uff0c\u5317\u4eac\u5927\u5b66\u90d1\u4fca\u8363\u3001\u4e2d\u79d1\u9662\u7269\u7406\u6240\u5f20\u5149\u5b87\u3001\u798f\u5efa\u7269\u8d28\u7ed3\u6784\u7814\u7a76\u6240\u5e84\u5dcd<\/strong>\u7b49\u4eba\u5229\u7528\u80fd\u91cf\u6001\u5206\u8fa8\u8d85\u5feb\u53ef\u89c1\/\u7ea2\u5916\u663e\u5fae\u8c31\u4eea\uff0c\u53d1\u73b0\u5728WS2\/MoS2\u5f02\u8d28\u7ed3\u7684\u754c\u9762\uff0c\u5728\u4ece\u4e00\u4e2a\u5c42\u95f4\u6fc0\u5b50\u5230\u53e6\u4e00\u4e2a\u5c42\u95f4\u6fc0\u5b50\u7684\u8f6c\u53d8\u8fc7\u7a0b\u4e2d\uff0c\u5b58\u5728\u5177\u6709\u8d85\u591a\u80fd\u91cf\u7684\u7535\u8377\u8f93\u8fd0\u4e2d\u95f4\u6001\uff08\u5373\u70ed\u6fc0\u5b50\uff09\u7684\u72ec\u7279\u5b9e\u9a8c\u8bc1\u636e\u3002\u7814\u7a76\u53d1\u73b0\u81ea\u7531\u8f7d\u6d41\u5b50\u4ece\u754c\u9762\u7a7f\u8fc7\u7684\u901f\u5ea6\u6bd4\u7ed3\u5408\u6210\u5c42\u95f4\u6fc0\u5b50\u7684\u901f\u5ea6\u8981\u5feb\u5f88\u591a\u3002\u8be5\u9879\u5de5\u4f5c\u89e3\u91ca\u4e86\u5728\u4e8c\u7ef4\u5f02\u8d28\u7ed3\u548c\u5668\u4ef6\u5b58\u5728\u52a8\u91cf\u4e0d\u5339\u914d\u548c\u6fc0\u5b50\u5c40\u57df\u5316\u7684\u60c5\u51b5\u4e0b\uff0c\u4ecd\u7136\u5b58\u5728\u663e\u8457\u7535\u8377\u8f6c\u79fb\u7387\u548c\u5149\u7535\u6d41\u4ea7\u751f\u7684\u5185\u5728\u673a\u7406\u3002<\/p>\n

\u672c\u6587\u6b63\u6587\u5206\u4e3a\u4e09\u5927\u90e8\u5206: \u7b2c\u4e00\u90e8\u5206\u4e3a\u80cc\u666f\u4ecb\u7ecd\uff1b\u7b2c\u4e8c\u90e8\u5206\u4e3a\u5b9e\u9a8c\u7ed3\u679c\uff0c\u5305\u62ecMoS2\u548cWS2\u76f4\u63a5\u7684\u6709\u6548\u7535\u8377\u8f93\u8fd0\uff0c\u7535\u8377\u8f93\u8fd0\u540e\u70ed\u6fc0\u5b50\u7684\u5feb\u901f\u5f62\u6210\uff0c\u76f8\u5bf9\u8f83\u5f31\u7684\u5c42\u95f4\u6fc0\u5b50\u7684\u5f62\u6210\uff0c\u7535\u8377\u8f93\u8fd0\u7684\u4e24\u4e2a\u4e3b\u8981\u6b65\u9aa4\u7b49\u56db\u4e2a\u65b9\u9762\uff1b\u7b2c\u4e09\u90e8\u5206\u4e3a\u7ed3\u8bba\u3002\u6587\u7ae0\u9644\u5f55\u8bb2\u8ff0\u4e86\u5b9e\u9a8c\u7684\u5177\u4f53\u64cd\u4f5c\u7ec6\u8282\u548c\u53c2\u6570\u3002\u4e0b\u9762\u5c31\u662f\u56fe\u6587\u5bfc\u8bfb:<\/p>\n

\"1\"<\/p>\n

\u56fe1 MoS2\/WS2\u5f02\u8d28\u7ed3\u7684\u6027\u8d28<\/strong>: (a) \u751f\u957f\u5f97\u5230\u7684WS2\/MoS2\u5f02\u8d28\u7ed3\u6837\u54c1\u7684\u5149\u5b66\u663e\u5fae\u6210\u50cf\uff0c\u4eae\u4e09\u89d2\u5f62\u533a\u57df\u662fWS2\u5355\u6676\uff0c\u6574\u4e2a\u56fe\u50cf\u662fMoS2\u5355\u5c42\u8584\u819c\uff1b(b) MoS2\/WS2\u5f02\u8d28\u7ed3\u7684\u80fd\u5e26\u793a\u610f\u56fe\uff0cMoS2\/WS2\u5f02\u8d28\u7ed3\u7684\u5149\u5b66\u6fc0\u52b1\u4ea7\u751f\u7d27\u675f\u7f1a\u5c42\u95f4\u6fc0\u5b50\uff08MoS2\u5c42\u7684\u7535\u5b50\uff0cWS2\u5c42\u7684\u7a7a\u7a74\uff09\uff1b(c) \u751f\u957f\u5236\u5907\u7684\u5355\u5c42WS2\u3001\u5355\u5c42MoS2\u548cMoS2\/WS2\u5f02\u8d28\u7ed3\u7684\u5149\u81f4\u53d1\u5149\uff08PL\uff09\u5149\u8c31\uff0c\u7531\u4e8eA\u578b\u6fc0\u5b50\u5171\u632f\uff0c\u5355\u5c42MoS2\u7684\u5149\u81f4\u53d1\u5149\u5cf0\u57281.86eV\uff0c\u5355\u5c42WS2\u7684\u5149\u81f4\u53d1\u5149\u5cf0\u57281.96eV\uff1b\u76f8\u6bd4\u5355\u4e2a\u6837\u54c1\u7684\u5149\u81f4\u53d1\u5149\u5cf0\uff0cMoS2\/WS2\u5f02\u8d28\u7ed3\u7684\u5149\u81f4\u53d1\u5149\u8c31\u53d1\u751f\u4e86\u8c03\u5236\uff0c\u8868\u660e\u5728\u5f02\u8d28\u7ed3\u4e2d\u53d1\u751f\u4e86\u5c42\u95f4\u7535\u8377\u7684\u8f93\u8fd0\u3002<\/p>\n

\"2\"<\/p>\n

\u56fe2 \u8d85\u5feb\u53ef\u89c1\/\u7ea2\u5916\u663e\u5fae\u5149\u8c31\u6d4b\u91cf<\/strong>\uff1a(a) \u8d85\u5feb\u53ef\u89c1\/\u7ea2\u5916\u663e\u5fae\u8c31\u4eea\u7684\u7ed3\u6784\u793a\u610f\u56fe\uff1b(b) \u5728100*100\u5fae\u7c73MoS2\/WS2\u5f02\u8d28\u7ed3\u6837\u54c1\u533a\u57df\u7684\u77ac\u65f6\u5438\u6536\u53d8\u5316\u56fe\u50cf\uff0c\u5e95\u5c42\u662f\u88ab\u6d4b\u8bd5\u533a\u57df\u7684\u5149\u5b66\u6210\u50cf\uff0c\u5f02\u8d28\u7ed3\u4f4d\u4e8e\u533a\u57df\u4e2d\u5fc3\uff1b\u4e0a\u5c42\u4ee3\u8868\u5728\u4ee5\u4e2d\u5fc3\u8109\u51b2\u80fd\u91cf\u4e3a1.85eV\u7684\u5149\u6fc0\u52b1MoS2\u6fc0\u53d1\u540e\u7684\u77ac\u65f6\u5438\u6536\u53d8\u5316100fs\uff0c\u6765\u81eaMoS2\/WS2\u5f02\u8d28\u7ed3\u533a\u57df\u7684\u4fe1\u53f7\u5bc6\u5ea6\u5927\u6982\u662f\u4ec5MoS2\u533a\u57df\u7684\u4e24\u500d\uff1b(c) MoS2\u3001WS2\u548cMoS2\/WS2\u5f02\u8d28\u7ed3\u57280.245-0.275eV\u80fd\u91cf\u8303\u56f4\u5185\uff0c670nm(1.85eV)\u6fc0\u53d1\u8bf1\u5bfc\u6fc0\u5149\u68c0\u6d4b\u7684\u5438\u6536\u53d8\u5316\u7684\u77ac\u95f4\u6f14\u53d8\uff0cOD\u4ee3\u8868\u5149\u5bc6\u5ea6\uff1b(d) c\u56fe\u57280.25eV(2000cm-1)\u5904\u7684\u6807\u51c6\u622a\u9762\u56fe\uff0c\u70b9\u662f\u5b9e\u9a8c\u6570\u636e\uff0c\u66f2\u7ebf\u662f\u8003\u8651\u5230\u6307\u5bfc\u54cd\u5e94\u51fd\u6570\uff08IRF\uff09\u7684\u591a\u6307\u6570\u62df\u5408\uff1b(e) MoS2\/WS2\u5f02\u8d28\u7ed3\u7684\u4fe1\u53f7\uff0c\u548c\u5355\u5c42MoS2\u548c\u5355\u5c42WS2\u7684\u4fe1\u53f7\u603b\u548c\uff0c\u5f02\u8d28\u7ed3\u7684\u521d\u59cb\u5bc6\u5ea6\u63a5\u8fd1100%\uff0c\u8fdc\u5927\u4e8e\u8fd9\u4e24\u4e2a\u5355\u5c42\u4fe1\u53f7\u7684\u603b\u548c\uff0c\u6240\u6709\u7684\u6d4b\u91cf\u5747\u662f\u5728\u5ba4\u6e29\u4e0b\uff0c\u7528\u5927\u7ea680uJcm-2\u7684\u5165\u5c04\u6cf5\u6d66\u901a\u91cf\u3002<\/p>\n

\"3\"<\/p>\n

\u56fe3 \u4e0d\u540c\u5149\u6fc0\u52b1\u7684\u52a8\u529b\u5b66\uff1a<\/strong>(a)\u57282000cm-1(0.25eV)\u76d1\u6d4b\u5230\u7684MoS2\u3001WS2\u548cMoS2\/WS2\u5f02\u8d28\u7ed3 630nm(1.95eV\uff0c\u901a\u91cf\u4e3a80uJcm-2)\u6fc0\u52b1\u8bf1\u5bfc\u5438\u6536\u53d8\u5316\uff0c\u70b9\u4ee3\u8868\u5b9e\u9a8c\u6570\u636e\uff0c\u66f2\u7ebf\u4ee3\u8868\u6839\u636eIRF\u8fdb\u884c\u7684\u591a\u6307\u6570\u62df\u5408\uff1b(b) a\u56fe\u7684\u6807\u51c6\u622a\u9762\u56fe\uff1b(c) MoS2\/WS2\u5f02\u8d28\u7ed3\u7684\u4fe1\u53f7\uff0c\u4e24\u4e2a\u5355\u5c42MoS2\u548cWS2\u6837\u54c1\u7684\u4fe1\u53f7\u603b\u548c\uff1b(d) \u5728MoS2\u3001WS2\u548cMoS2\/WS2\u5f02\u8d28\u7ed3\u76842000cm-1(0.25eV)\u5904\uff0c\u76d1\u6d4b\u7684400nm(3.1eV\uff0c\u901a\u91cf\u4e3a10uJcm-2)\u6fc0\u52b1\u8bf1\u5bfc\u5438\u6536\u53d8\u5316\u7684\u77ac\u95f4\u6f14\u53d8\uff1b(e) d\u56fe\u7684\u6807\u51c6\u622a\u9762\u56fe\uff1b(f) MoS2\/WS2\u5f02\u8d28\u7ed3\u7684\u4fe1\u53f7\u548c\u4e24\u4e2a\u5355\u5c42MoS2\u548cWS2\u6837\u54c1\u7684\u4fe1\u53f7\u603b\u548c\uff1b(g) \u5bf9\u4e8eMoS2\/WS2\u5f02\u8d28\u7ed3\uff0c\u57281390(0.17eV)-2910cm-1(0.36eV)\u9891\u7387\u8303\u56f4\u5185\u7684400nm\u6fc0\u52b1\u8bf1\u5bfc\u5438\u6536\u53d8\u5316\u7684\u77ac\u65f6\u6f14\u53d8\uff0c\u6c34\u5e73\u865a\u7ebf\u4ee3\u8868\u5728\u8be5\u4fe1\u53f7\u8870\u53d8\u521d\u59cb\u5bc6\u5ea6\u768420%\u540e\u7684\u5ef6\u8fdf\u65f6\u95f4\uff1b(h) \u5728MoS2\/WS2\u5f02\u8d28\u7ed3\u76842910cm-1(0.36eV\uff0c\u7ea2\u8272)\u548c800nm(1.55eV\uff0c\u84dd\u8272)\u76d1\u6d4b\u5230\u7684400nm(3.1eV)\u6fc0\u52b1\u8bf1\u5bfc\u5438\u6536\u53d8\u5316\u7684\u77ac\u65f6\u6f14\u53d8\uff0c1.55eV\u8fdc\u5927\u4e8e\u5c42\u95f4\u6fc0\u5b50\u7684\u675f\u7f1a\u80fd\uff0c\u4f4e\u4fe1\u53f7\u5ef6\u8fdf\u4ee3\u8868\u957f\u7684\u6fc0\u52b1\u5bff\u547d\u3002<\/p>\n

\"4\"<\/p>\n

\u56fe4 \u00a0\u5f02\u8d28\u7ed3\u7684\u7535\u8377\u5206\u79bb\u8fc7\u7a0b<\/strong>\uff1a\u5728WS2(MoS2)\u5355\u5c42\u53d7\u5230\u6fc0\u52b1\u540e\uff0c\u7535\u5b50\uff08\u7a7a\u7a74\uff09\u4eceWS2(MoS2)\u5355\u5c42\u7684CBM(VBM)\u8f6c\u79fb\u5230MoS2(WS2)\u5355\u5c42\u7684\uff08\u4f4e\uff09CBM(VBM)\u4e0a\u9762\u7684\u5bfc\u5e26\uff08\u4ef7\u5e26\uff09\uff0c\u6574\u4e2a\u8fc7\u7a0b\u572850fs\u5185\u5b8c\u6210\uff0c\u751f\u6210\u4e86\u4e00\u4e2a\u5177\u6709\u76f8\u5bf9\u957f\u8ddd\u79bb\u7684\u70ed\u5c42\u95f4\u6fc0\u5b50\uff0c\u70ed\u6fc0\u5b50\u5728800fs\u5185\u91ca\u653e\u989d\u5916\u7684\u80fd\u91cf\uff0c\u5f62\u6210\u7d27\u675f\u7f1a\u5c42\u95f4\u6fc0\u5b50\u3002<\/p>\n

\"5\"<\/p>\n

\u56fe5 \u00a0\u5728WS2\/MoS2\u5f02\u8d28\u7ed3\u5185\u5149\u8bf1\u5bfc\u7535\u8377\u5206\u79bb\u7684\u793a\u610f\u56fe\u548c\u5c42\u95f4\u6fc0\u5b50\u7684\u5f62\u6210\u8fc7\u7a0b:\u5728\u5149\u6fc0\u52b1\u540e:<\/strong>\u00a0\u5728\u5149\u6fc0\u52b1\u540e\uff0c(1)\u7535\u5b50-\u7a7a\u7a74\u5bf9\u548c(2)\u5176\u4ed6\u8f7d\u6d41\u5b50\u5728\u6bcf\u4e2a\u5355\u72ec\u5c42\u4ea7\u751f\uff08\u4ee5MoS2\u4e3a\u4f8b\uff09\uff1b\u4e4b\u540e\uff0c(2)\u7a7a\u7a74\u8f6c\u79fb\u81f3WS2\u5c42\uff0c\u7535\u5b50\u8f6c\u79fb\u81f3MoS2\u5c42\uff0c\u5f62\u6210\u4e2d\u95f4\u6001\uff0c\u5373\u5c42\u95f4\u70ed\u6fc0\u5b50\uff1b(3)\u6700\u540e\uff0c\u70ed\u6fc0\u5b50\u91ca\u653e\u989d\u5916\u80fd\u91cf\uff0c\u5f62\u6210\u7d27\u675f\u7f1a\u5c42\u95f4\u6fc0\u5b50\u3002\u5728\u56feb\u4e2d\uff0c\u5c42\u95f4\u4e2d\u95f4\u6001\u7684\u5f62\u6210\u662f\u8fdc\u5feb\u4e8e\u5c42\u95f4\u6fc0\u5b50\u7684\u5f62\u6210\u7684\u3002<\/p>\n

\u539f\u6587\u94fe\u63a5\uff1a<\/strong>Ultrafast formation of interlayer hot excitons in atomically thin MoS2<\/sub>\/WS2<\/sub> heterostructures<\/a>(Nature Communications\uff0c2016\uff0cDoi:10.1038\/ncomms12512)<\/p>\n

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