本文主要研究内容
作者林雯嫣（2019）在《改善有机磷光电致发光器件效率与效率滚降的研究》一文中研究指出：有机电致发光器件（Organic light-emitting device,OLED）由于轻薄,可弯折,结构简单,能耗低,高显色性,发光均匀柔和,健康护眼,绿色环保等众多特点,逐渐在固态照明和平板显示中崭露头角。磷光材料由于其能够实现单线态和三线态激子共同参与发光,使器件的内量子效率理论上可以达到100%,拥有较高的外量子效率,具有良好的应用前景。如何进一步提高磷光器件的效率,缓解效率滚降一直是各国的研究者需要攻克的问题。本文利用Cs作为N掺杂剂,对绿色磷光器件和黄色磷光器件的效率和效率滚降进行改善,并据此提出两种新型电荷产生单元（charge generation unit,CGU）,制备出叠层OLED器件,最后制备了蓝色磷光器件并研究了效率滚降问题和微腔效应问题。论文主要内容包括以下几个方面:1、利用Cs作为N掺杂剂,分别对B3PyPPM、Bphen进行N掺杂,结果表明,采用B3PyPPM:Cs制备的绿色磷光器件,能够将器件电子传输层的电导率提高到1.59×10-6S cm-1,电流效率提高到68.5cd/A,改善效率滚降,使其符合三重态-三重态激子淬灭（triplet-triplet annihilation,TTA）的效率滚降模型;采用Bphen:Cs制备的黄色磷光器件将器件的临界电流值提高到189mA/cm2,高于未进行N掺杂器件的临界电流141mA/cm2,缓解了电荷的不平衡,减小了多余空穴对激子的淬灭,从而改善效率滚降。2、分别利用B3PyPPM:Cs/Al/HAT-CN和B3PyMPM:Cs/Al/HAT-CN作为CGU制备叠层器件。实验证明,B3PyMPPM:Cs和B3PyMPM:Cs能降低电子的注入势垒,薄层Al的加入能够进一步降低电子的注入势垒,并且增强CGU的稳定性。利用B3PyPPM:Cs/Al/HAT-CN制备的叠层器件在5mA/cm2电流密度下的电压和亮度分别为8.12V和1450cd/m2,接近两个单节器件的电压和亮度之和,光谱的峰值分别来自于两个发光单元。利用B3PyMPM:Cs/Al/HAT-CN做CGU制备出了基于Ir（ppy）2acac的高效叠层OLED。在5 mA/cm2电流密度下,叠层器件的驱动电压和亮度分别为单节器件的2.04倍和2.84倍,最大电流效率可达172.2cd/A,为单节器件的2.18倍,在1000cd/m2亮度下,电流效率仍可达到165.4cd/A,效率滚降仅为3.9%。叠层器件的光谱峰值基本不随观测角度的变化而变化,意味着叠层器件的高效率是由于两个发光单元的发光层共同发光的结果,而不是因为微腔效应。3、以B3PyPPM为电子传输层,Cs为N掺杂剂,TCTA和mCP为母体,制备了两组基于Firpic的蓝色磷光器件。以mCP为母体的器件在亮度从500cd/m2上升到3000cd/m2时,外量子效率滚降仅仅只有10.1%,两组器件的开启电压分别为2.3V和2.8V,低于其他电子传输层制备的Firpic器件,说明B3PyPPM有其他传输层材料所不具备的优异的电子注入特性。器件光谱的振动峰强度会随着电子传输层B3PyPPM厚度的变化而变化,具有明显的微腔效应。
Abstract
you ji dian zhi fa guang qi jian （Organic light-emitting device,OLED）you yu qing bao ,ke wan she ,jie gou jian chan ,neng hao di ,gao xian se xing ,fa guang jun yun rou he ,jian kang hu yan ,lu se huan bao deng zhong duo te dian ,zhu jian zai gu tai zhao ming he ping ban xian shi zhong chan lou tou jiao 。lin guang cai liao you yu ji neng gou shi xian chan xian tai he san xian tai ji zi gong tong can yu fa guang ,shi qi jian de nei liang zi xiao lv li lun shang ke yi da dao 100%,yong you jiao gao de wai liang zi xiao lv ,ju you liang hao de ying yong qian jing 。ru he jin yi bu di gao lin guang qi jian de xiao lv ,huan jie xiao lv gun jiang yi zhi shi ge guo de yan jiu zhe xu yao gong ke de wen ti 。ben wen li yong Cszuo wei Ncan za ji ,dui lu se lin guang qi jian he huang se lin guang qi jian de xiao lv he xiao lv gun jiang jin hang gai shan ,bing ju ci di chu liang chong xin xing dian he chan sheng chan yuan （charge generation unit,CGU）,zhi bei chu die ceng OLEDqi jian ,zui hou zhi bei le lan se lin guang qi jian bing yan jiu le xiao lv gun jiang wen ti he wei qiang xiao ying wen ti 。lun wen zhu yao nei rong bao gua yi xia ji ge fang mian :1、li yong Cszuo wei Ncan za ji ,fen bie dui B3PyPPM、Bphenjin hang Ncan za ,jie guo biao ming ,cai yong B3PyPPM:Cszhi bei de lu se lin guang qi jian ,neng gou jiang qi jian dian zi chuan shu ceng de dian dao lv di gao dao 1.59×10-6S cm-1,dian liu xiao lv di gao dao 68.5cd/A,gai shan xiao lv gun jiang ,shi ji fu ge san chong tai -san chong tai ji zi cui mie （triplet-triplet annihilation,TTA）de xiao lv gun jiang mo xing ;cai yong Bphen:Cszhi bei de huang se lin guang qi jian jiang qi jian de lin jie dian liu zhi di gao dao 189mA/cm2,gao yu wei jin hang Ncan za qi jian de lin jie dian liu 141mA/cm2,huan jie le dian he de bu ping heng ,jian xiao le duo yu kong xue dui ji zi de cui mie ,cong er gai shan xiao lv gun jiang 。2、fen bie li yong B3PyPPM:Cs/Al/HAT-CNhe B3PyMPM:Cs/Al/HAT-CNzuo wei CGUzhi bei die ceng qi jian 。shi yan zheng ming ,B3PyMPPM:Cshe B3PyMPM:Csneng jiang di dian zi de zhu ru shi lei ,bao ceng Alde jia ru neng gou jin yi bu jiang di dian zi de zhu ru shi lei ,bing ju zeng jiang CGUde wen ding xing 。li yong B3PyPPM:Cs/Al/HAT-CNzhi bei de die ceng qi jian zai 5mA/cm2dian liu mi du xia de dian ya he liang du fen bie wei 8.12Vhe 1450cd/m2,jie jin liang ge chan jie qi jian de dian ya he liang du zhi he ,guang pu de feng zhi fen bie lai zi yu liang ge fa guang chan yuan 。li yong B3PyMPM:Cs/Al/HAT-CNzuo CGUzhi bei chu le ji yu Ir（ppy）2acacde gao xiao die ceng OLED。zai 5 mA/cm2dian liu mi du xia ,die ceng qi jian de qu dong dian ya he liang du fen bie wei chan jie qi jian de 2.04bei he 2.84bei ,zui da dian liu xiao lv ke da 172.2cd/A,wei chan jie qi jian de 2.18bei ,zai 1000cd/m2liang du xia ,dian liu xiao lv reng ke da dao 165.4cd/A,xiao lv gun jiang jin wei 3.9%。die ceng qi jian de guang pu feng zhi ji ben bu sui guan ce jiao du de bian hua er bian hua ,yi wei zhao die ceng qi jian de gao xiao lv shi you yu liang ge fa guang chan yuan de fa guang ceng gong tong fa guang de jie guo ,er bu shi yin wei wei qiang xiao ying 。3、yi B3PyPPMwei dian zi chuan shu ceng ,Cswei Ncan za ji ,TCTAhe mCPwei mu ti ,zhi bei le liang zu ji yu Firpicde lan se lin guang qi jian 。yi mCPwei mu ti de qi jian zai liang du cong 500cd/m2shang sheng dao 3000cd/m2shi ,wai liang zi xiao lv gun jiang jin jin zhi you 10.1%,liang zu qi jian de kai qi dian ya fen bie wei 2.3Vhe 2.8V,di yu ji ta dian zi chuan shu ceng zhi bei de Firpicqi jian ,shui ming B3PyPPMyou ji ta chuan shu ceng cai liao suo bu ju bei de you yi de dian zi zhu ru te xing 。qi jian guang pu de zhen dong feng jiang du hui sui zhao dian zi chuan shu ceng B3PyPPMhou du de bian hua er bian hua ,ju you ming xian de wei qiang xiao ying 。
论文参考文献
论文详细介绍
论文作者分别是来自华侨大学的林雯嫣，发表于刊物华侨大学2019-10-31论文，是一篇关于效率论文,效率滚降论文,掺杂论文,叠层器件论文,华侨大学2019-10-31论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自华侨大学2019-10-31论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：效率论文; 效率滚降论文; 掺杂论文; 叠层器件论文; 华侨大学2019-10-31论文;