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时间:2020-03-26
《基于苯并噻二唑和硅芴的一系列红光材料的载流子传输性质及荧光性质.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、物理化学学~(WuliHuaxueXuebao1MavActa.一Chim.Sin.2014,30(5),855—865855[Article]doi:10.3866/PKU.WHXB201403113WWW.whxb.pku.edu.cn基于苯并噻二唑和硅芴的一系列红光材料的载流子传输性质及荧光性质李岩邹陆一’任爱民’(吉林大学理论化学研究所,理论与计算化学重点实验室,长春130023;吉林化工学院化学与制药工程学院物理化学系,吉林吉林132022)摘要:用密度泛函理论(DFT)方法研究了基于苯并噻二唑和硅芴的一系列聚
2、合物的基态和激发态结构、传输和荧光性质.聚合物的能隙、电离能、电子亲和势、最低激发能以及吸收光谱通过外推法得到.结果表明空穴、电子注入和传输性质受苯并噻唑在硅芴上的位置以及正丁基在噻吩上的位置影响很大.(SiF2.DHTBT1m和(SiF1一DHTBT1一m)(SiF和DHTBT分别代表硅芴和4,7-二(2一噻吩基)-2,1,3-苯并噻二唑)表现出较好的空穴和电子注入性质,而(SiF1-DHTBT1一o)和(SiF1-DHTBT1一p)n的电荷注入性质较差.除(SiF1.DHTBT1.0)外,聚合物的荧光光谱处于红光范围
3、.关键词:密度泛函理论:空穴和电子注入:外推法:聚合物:SiF中图分类号:O641ChargeTransportandFluorescencePropertiesofaSeriesofRed·EmittingMaterialsBasedonBenzothiadiazoIeandSilafluoreneLIYan’一ZOULu.Yi’RENAj.Min’,(StateKeyLaboratoryofTheoreticalandComputationalChemistry,InstituteofTheoreticalChemi
4、stry,JilinUniversity,Changchun130023,PR.China;2DepartmentofPhysicalChemistry,SchoolofChemicalandPharmaceuticalEngineering,JilinInstituteofChemicalTechnology,Jilin132022,JilinProvince,R.China)Abstract:Thegroundandexcitedstates,charge-transport,andfluorescenceprope
5、rtiesofaseriesofpolymersbasedonbenz0thiadiazOleandsilafluorenewereinvestigatedusingdensityfunctionaItheory(DFT).Thebandgaps,ionizationpotentials,electronaffinities,thelowestexcitationenergies,andabsorptionspectraofthepolymerswereestimatedbyextrapolatingthoseofthe
6、oligomerstoinfinitechainlengths.Theresultsshowthatlhehole/electroninjection/transportabilitiesandtheopticalpropertiesofthepolymersaresignifcantlyaffectedbythepositionofthebenzothiadiazolegrouponthesilafluorenegroupandthepositionofthebutylgrouponthethiophenegroup.
7、(SiF2一DHTBT1一m)and(SiF1-DHTBT1-m)【hereafterSiFandDHTBTaresilafluoreneand4,7-di(2-thieny1)一2,1,3一benzocl1iadiaz0Ie,respectively1showgoodholeandelectroninjectionperformancesbut(SiF1-DHTBT1一o)and(SiF1-DHTBT1一p)exhibitpoorcarrierinjectionperformances.Thepredictedemis
8、sionspectraofthepolymersarelocatedintheredvisible.1ightrange。exceptinthecaseof(SiF1.DHTBT1.O).KeyWords:Densityfunctionaltheo~;Holeandelectroninjection;Extrapol
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