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《有机电致发光器件(oled) 的结构和发光机理 毕业设计》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、摘要OLED具有全固态、主动发光、高对比度、超薄、低功耗、无视角限制、响应速度快、低电压直流驱动、工作温度范围宽、易于实现柔性显示和3D显示等诸多优点,将成为未来20年最具“钱景”的新型显示技术。同时,由于OLED具有可大面积成膜、功耗低以及其它优良特性,因此还是一种理想的平面光源,在未来的节能环保型照明领域也具有广泛的应用前景。本文将系统介绍OLED的发展背景、发展史、制备及应用,介绍了有机电致发光器件(OLED)的结构和发光机理。典型的传统OLED是生长在透明的阳极例如ITO玻璃上的,发射出来的光是由最底层衬底透出,这使得它与其他电子元件如硅基显示驱
2、动器的集成变得非常复杂。因此,理想的做法是研发一种OLED,其光的发射由器件顶部的透明电极透出。重点介绍一种具有阴极作为底层接触层,阳极ITO薄膜作为顶部电极的表面发射型或者说有机“反转”的LED(OILED)。介绍了该器件的制备工艺,对该OILED的I一V特性及EL谱进行了测试,发现与传统的OLED相类似,而工作电压有所升高,效率一定程度上降低。为了进一步改善器件性能,我们对器件增加了保护层(PL),研究了PL对OILED器件性能的影响。最后概述了器件的技术进展和应用前景,并展望了未来OLED发展的方向。关键词:有机电致发光器件,有机反转电致发光器件,
3、发光机理,保护层(PL),阳极ITO薄膜AbstractOLEDhasasolidstate,self-luminous,highcontrast,ultra-thin,lowpowerconsumption,viewingangle,fastresponse,low-voltageDCdrive,theoperatingtemperaturerange,easytoimplementmanyoftheadvantagesofflexibledisplaysand3Ddisplayswillbecomethefuture20yearsofthemost"
4、moneyscene"ofthenewdisplaytechnology.Also,becauseOLEDhasalarge-areafilm,lowpowerconsumption,andotherfinefeatures,soanidealplanelightsource,alsohasbroadapplicationprospectsinthefutureofenergysavinglightinginthearea.Inthispaper,thesystematicintroductionofOLEDdevelopmentbackground,h
5、istoryofthedevelopment,preparationandapplication,thestructureoftheorganicelectroluminescentdevices(OLED)andtheluminescencemechanism.TypicaltraditionalOLEDisgrowthintransparentanodeITOglass,forexample,thelightisemittedbybottomgivesfullysubstrate,thismakesitandotherelectroniccompon
6、entssuchasthattheintegrationofthesilicabaseddrivebecomeverycomplex.Therefore,theidealwayisdevelopingaOLED,itslightemissionfromthetopofthedevicegivesfullytransparentelectrodes.Focusesonacathodeasthebottomcontactlayer,theanodeofITOfilmsasthetopelectrodesurfaceemissionororganicLEDof
7、the"reverse"(OILED).Ofthedevicepreparationprocess,theOILEDI-VcharacteristicsandELspectraofthetest,foundthatsimilartotheconventionalOLED,theworkingvoltagewasincreasedefficiencytoacertainextentonthelower.Tofurtherimprovethedeviceperformanceofthedevicetoincreasetheprotectivelayer(PL
8、),PLOILEDdeviceperformance.Finallyanover