半导体纳米晶的制备及其性能的研究

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1、北京交通大学硕士学位论文半导体纳米晶的制备及其性能的研究姓名：唐爱伟申请学位级别：硕士专业：光学指导教师：滕枫20060301北京交通大掌硕士学位论文在标记木瓜蛋白酶前后纳米晶的荧光光谱和吸收光谱的变化情况，结果发现标记木瓜蛋白酶分子后的纳米晶的吸收光谱和荧光光谱均有蓝移现象发生，并且发现标记了木瓜蛋白酶之后的纳米晶的吸收光谱变得更加平坦，证实了核壳结构的纳米晶与木瓜蛋白酶之问发生了结合反应。4、采用Peng等人的方法在有机体系ToP0厂rOP中合成了cdse纳米晶，并将其作为发光层，Alq3作为电子传输层和BCP作为空穴阻挡层制备了多层电致发光器件：Glass／ITO／PED

2、OT：Pss／cdse／BcP／～q3，AJ和单层器件：G1as“ITO／PEDOT：PSS／cdse／舢，比较了它们的发光特性，发现cdSe纳米晶的光致发光光谱、单层器件以及多层器件的电致发光光谱几乎覆盖了整个可见光区，器件的发光颜色近于白色，而且多层器件的发光强度较单层器件有明显提高，且发现器件的色坐标随着驱动电压的增加有所变化。关键词：半导体纳米晶；cdse；表征；光电导；生物标迫：电致发光北京变通大学硕士掌位论文Abstractsemiconductornanocrystalshavecxhibiteduniquephysicalandchemicalpropertie

3、sinthepastfewdecades，givingrisetonumerouspotentialapplicationsjnphysics，elec“Dnics，chemistryandbjology．ThusthejnVestigationonsynthesjsofsemiconductornanocrystalshasbecomeanactiVefield．Inthethesis，semiconductornanocrystalsweresynlhesizedinaqueoussolutionbyatraditionalc0110idchemicalmethod，and

4、theirstructureandluminescencepropertieswereinvestigated．WeseaI℃hedaftertheapplicationsofsemiconductornanocrystalsinoptoelectronicsandbio—labeljng．Resul据aresummafjzedaSfollows：1．CdSenanocrystalsweresynthesjzedinaqueoussolutionbyusing2-meI℃apto。acetateacidasthestabjlizer．Core／shellstructumlCdS

5、“CdSandcore／Shell／shellstmcturalCdSe／CdS／zIlSnaJlocrystalsweresynthesizedwithCdSeasthecorematerial．x-raypowerdiffI’action(xRD)，x—rayphotoelectronspectra(xPs)andtransmissionelectronmjcroscopy(TEM)wereusedtocharacterjzet11ejrcrystaUoidstructures，surfaceconstitutes，shapeandsizedistribution．Thep

6、hotoluminescencespectraandabsorptionspectrawereemployedtostudytheluminescenceandabsorptionproperties，andtheresultsindjcatedthatthe1uminescenceintensitiesofcore／shellCdSe／CdSnanocrystalsandcore／shell／shellCdSc／CdS／ZnSnaIlocrystalswereenhallcedgreatlyincomparisonwiththeuncoatedCdSenanocrystals

7、，andthered-shiftappearedintheemissionpeakandabsorptionpeak．ThisindicatedthatthesurfacecoatingplayedadistinctpaninpassiViation．1naddition，weinvestigatedtheinfluenceofdifFerentpreparationconditionsonluminescencepropertiesofCdSenanocrystals，andfoundth