°ëµ¼ÌåÎïÀíѧ(Áõ¶÷¿Æ)µÚÆß°æ-ÍêÕû¿ÎºóÌâ±ê×¼´ð°¸

1V£¨2m£©g(E)?(E?EC)2232??

dZ?g(E)dEdZ µ¥Î»Ìå»ýÄÚµÄÁ¿×Ó̬ÊýZ0?V100??2100h2 Ec?E?3c?2?22mnl8mnl1*2£¨2mn£©1V Z0?g(E)dE??(E?EC)2dE23?VEC2??EC 23100h*23 ?V£¨2mn£©2(E?E)2Ec?8m?L2Cn32?2?3Ec

*n32 ?1000?3L3

2. ÊÔÖ¤Ã÷ʵ¼Ê¹è¡¢ÕàÖе¼´øµ×¸½½ü״̬Ãܶȹ«Ê½ÎªÊ½£¨3-6£©¡£ 2.Ö¤Ã÷£ºsi¡¢Ge°ëµ¼ÌåµÄE£¨IC£©~K¹ØÏµÎª22x2y2z khk?k״̬Êý¡£E£¨k£©?E?(?)CC2mtml ''''2¼´d?g(k)??Vk?g(k)?4?kdkz??111mmm''3Áîkx?(a)2kx,ky?(a)2ky,kz'?(a)2kz 12??3mtmtml12(m?m?m)dz'ttl2???g(E)??4??(E?E)Vc 22222dEhh??'''??Ôò£ºEc(k')?Ec?(k?k?k\)xyz?2ma

¶ÔÓÚsiµ¼´øµ×ÔÚ100¸ö·½Ïò£¬ÓÐÁù¸ö¶Ô³ÆµÄÐýתÍÖÇò£¬'ÔÚkϵÖÐ,µÈÄÜÃæÈÔΪÇòÐεÈÄÜÃæ ÕàÔÚ£¨111£©·½ÏòÓÐËĸö£¬ÔÚE~E?dE¿Õ¼äµÄ״̬ÊýµÈÓÚk¿Õ¼äËù°üº¬µÄ?m?m?m ''tlÔÚkϵÖеÄ̬ÃܶÈg(k)??t3??ma?

1'?k?2ma(E?EC)

h?31?22mn'?V?g(E)?sg(E)?4?(2)2(E?Ec)2V?h?12?mn?s3mt2ml31??3. µ±E-EFΪ1.5k0T£¬4k0T, 10k0Tʱ£¬·Ö±ðÓ÷ÑÃ×·Ö²¼º¯ÊýºÍ²£¶ú×ÈÂü·Ö²¼º¯Êý¼ÆËãµç×ÓÕ¼¾Ý¸÷¸ÃÄܼ¶µÄ¸ÅÂÊ¡£

·ÑÃ×Äܼ¶ E?EF·ÑÃ׺¯Êý 1E?EF1?ek0T0.182 0.018 ²£¶û×ÈÂü·Ö²¼º¯Êý f(E)?f(E)?e?E?EFk0T1.5k0T 4k0T 0.223 0.0183 9

10k0T

4.54?10?5 4.54?10?54. »­³ö-78oC¡¢ÊÒΣ¨27 oC£©¡¢500 oCÈý¸öζÈϵķÑÃ×·Ö²¼º¯ÊýÇúÏߣ¬²¢½øÐбȽϡ£

5. ÀûÓñí3-2ÖеÄm*n£¬m*pÊýÖµ£¬¼ÆËã¹è¡¢Õà¡¢É黯ïØÔÚÊÒÎÂϵÄNC , NVÒÔ¼°±¾Õ÷ÔØÁ÷×ÓµÄŨ¶È¡£

?3?2?koTmn)2?NC?2(2h??2?koTm??p325?Nv?2()2h?Eg??1?ni?(NcNv)2e2koT???? ?Ge:mn?0.56m0;mp?o.37m0;Eg?0.67ev???? ?si:mn?1.08m0;mp?o.59m0;Eg?1.12ev???GA:m?0.068m;m?asn0p?o.47m0;Eg?1.428ev?

6. ¼ÆËã¹èÔÚ-78 oC£¬27 oC£¬300 oCʱµÄ±¾Õ÷·ÑÃ×Äܼ¶£¬¼Ù¶¨ËüÔÚ½û´øÖмäºÏÀíÂð£¿

??SiµÄ±¾Õ÷·ÑÃ×Äܼ¶£¬Si:m?1.08m,mn0p?0.59m0

???EC?EV3kTmp EF?Ei??ln?24mn

3kT0.59m0µ±T1?195Kʱ£¬kT1?0.016eV,ln??0.0072eV 41.08m0 3kT0.59µ±T2?300Kʱ£¬kT2?0.026eV,ln??0.012eV41.08

3kT0.59µ±T ln??0.022eV2?573Kʱ£¬kT3?0.0497eV,41.08ËùÒÔ¼ÙÉè±¾Õ÷·ÑÃ×Äܼ¶ÔÚ½û´øÖмäºÏÀí£¬ÌØ±ðÊÇζȲ»Ì«¸ßµÄÇé¿öÏ¡£ 7. ¢ÙÔÚÊÒÎÂÏ£¬ÕàµÄÓÐЧ̬ÃܶÈNc=1.05?1019cm-3£¬NV=3.9?1018cm-3£¬ÊÔÇóÕàµÄÔØÁ÷×ÓÓÐЧÖÊÁ¿m*n m*p¡£¼ÆËã77KʱµÄNC ºÍNV¡£ ÒÑÖª300Kʱ£¬Eg=0.67eV¡£77kʱEg=0.76eV¡£ÇóÕâÁ½¸öζÈʱÕàµÄ±¾Õ÷ÔØÁ÷×ÓŨ¶È¡£¢Ú77Kʱ£¬ÕàµÄµç×ÓŨ¶ÈΪ1017cm-3 £¬¼Ù¶¨ÊÜÖ÷Ũ¶ÈΪÁ㣬¶øEc-ED=0.01eV£¬ÇóÕàÖÐÊ©Ö÷Ũ¶ÈEDΪ¶àÉÙ£¿

10

7£¨.1£©¸ù¾ÝNc?3k0Tmn?2()222 ??32Nv?2()22??

2k0Tm?pµÃ ??2???Nc?m?0.56m0?5.1?10?31kgn??k0T?2? 1232??Nv2???m?0.29m0?2.6?10?31kg p???k0T?2? £¨2£©77KʱµÄNC¡¢NV ''N£¨C77K£©3T? N£¨TC300K£©

773773'?NC?NC?£¨£©?1.05?1019?£¨£©?1.37?1018/cm3 300300' NV?NV?£¨23

773773£©?3.9?1018?£¨£©?5.08?1017/cm3300300(3)ni ?(NcNv)2e

1?Eg2koT1?0.672k0?300?2ÊÒΣºni?(1.05?10?3.9?10)e

1918?1.7?1013/cm3?1.98?10?7/cm3ND77Kʱ£¬ni?(1.37?1018?5.08?1017)2e

?D

10.762k0?77n0?n? ??ED?EFED?Ec?EC?EF?EDno????k0Tk0Tk0TNC1?2e1?1?2e 2exp17n?E0.0110173D?ND?n0(1 ?2e?o)?1017(1?2e?)?1.17?10/cm18koTN0.0671.37?10C

NDND8. ÀûÓÃÌâ 7Ëù¸øµÄNc ºÍNVÊýÖµ¼°Eg=0.67eV£¬ÇóζÈΪ300KºÍ500Kʱ£¬º¬Ê©Ö÷Ũ¶ÈND=5?1015cm-3£¬ÊÜÖ÷Ũ¶ÈNA=2?109cm-3µÄÕàÖеç×Ó¼°¿ÕѨŨ¶ÈΪ¶àÉÙ£¿

Eg ?18.300Kʱ£ºni?(NcNV)2e2k0T?2.0?1013/cm3 e''500 Kʱ£ºni?(NCNV)2e1?g2k0T'?6.9?1015/cm3¸ù¾ÝµçÖÐÐÔÌõ¼þ£º

?n0?p0?ND?NA?022?n?n(N?N)?n?0? 00DAi2?n0p0?ni 12ND?NA?ND?NA22??n0???()?ni?22??N?ND?NA?ND2?p0?A??()?ni2?22??153??n0?5?10/cm1 11 2

9.¼ÆËãÊ©Ö÷ÔÓÖÊŨ¶È·Ö±ðΪ1016cm3£¬,1018 cm-3£¬1019cm-3µÄ¹èÔÚÊÒÎÂϵķÑÃ×ÄÜ

¼¶£¬²¢¼Ù¶¨ÔÓÖÊÊÇÈ«²¿µçÀ룬ÔÙÓÃËã³öµÄµÄ·ÑÃ×ÄÜ ¼¶ºË¶Ôһϣ¬ÉÏÊö¼Ù¶¨ÊÇ·ñÔÚÿһÖÖÇé¿ö϶¼³ÉÁ¢¡£¼ÆËãʱ£¬È¡Ê©Ö÷Äܼ¶ÔÚµ¼´øµ×ϵÄÃæµÄ0.05eV¡£

9.½â¼ÙÉèÔÓÖÊÈ«²¿ÓÉÇ¿µçÀëÇøµÄEF 193?ND?NC?2.8?10/cmEF?Ec?k0Tln,T?300Kʱ,?103 NC?n?1.5?10/cmi? N»òEF?Ei?k0TlnD,Ni

1016ND?10/cm;EF?Ec?0.026ln?Ec?0.21eV192.8?101018183ND?10/cm;EF?Ec?0.026ln?Ec?0.087eV192.8?101019193ND?10/ncm;EF?Ec1?0.026ln119?Ec?0.0.27eV16DND?10:??2.8?100.16?0.42%³ÉÁ¢ED?EC?0.21ND11Ê©Ö÷ÔÓÖÊÈ«²¿µçÀë±ê×¼(2)?EC?ED?0.051?e0.026Ϊ90%,10%Õ¼¾ÝÊ©Ö÷1?eVe0.02622nD1?ÊÇ·ñ?10%E?E1NDF118?neDD1k0TND?10:2??30%²»³ÉÁ¢0.037ND1?nD11?e0.026»ò?2?90%E?EF1NDD1?en1DND?1019:2?k0T?0.023?80%?10%²»³ÉÁ¢ND11?e0.0262'£¨2£©Çó³ö¹èÖÐÊ©Ö÷ÔÚÊÒÎÂÏÂÈ«²¿µçÀëµÄÉÏÏÞ2N?EDD??(D)e(δµçÀëÊ©Ö÷Õ¼×ܵçÀëÔÓÖÊÊýµÄ°Ù·Ö±È£©NCkoT1630.1NC?0.0262ND0.0510%?e,ND?e?2.5?1017/cm3NC0.0262ND?1016,1018?2.5?1017cm3ûÓÐÈ«²¿µçÀë0.05

ND?1016СÓÚ2.5?1017cm3È«²¿µçÀë12

ÁªÏµ¿Í·þ£º779662525#qq.com(#Ìæ»»Îª@)