本文主要研究内容
作者王子琪(2019)在《热活化延迟荧光材料在白光有机发光二极管中的应用研究》一文中研究指出:目前,有机发光二极管(OLEDs)作为新一代显示照明技术正走进人们的生活,热活化延迟荧光(TADF)材料作为OLEDs第三代发光材料获得了研究者的广泛关注。经过多年的发展,研究人员已合成出许多性能优异的TADF材料,蓝绿红三色均有相对应的TADF材料实现了超过20%的外量子效率(EQE),可与磷光材料相媲美。对于白光有机发光二极管(WOLEDs)来说,目前大多数TADF材料都是作为发光材料或辅助掺杂剂应用到WOLEDs中用以提高器件的效率,少数TADF材料可以作为掺杂剂的主体材料,通过不完全能量传递实现白光发射。可作为主体且能有效改善WOLEDs性能的TADF材料目前仍然有限,而且TADF材料作为主体在WOLEDs中的研究还不够系统,因此应对TADF材料在WOLEDs中的应用进行更深入的研究。本论文研究了一种在非掺杂结构下也能实现高效率的蓝光TADF材料mSOAD,并探究了其在WOLEDs中的应用。首先分析了TADF材料mSOAD本身的光电性能,制备了高性能的蓝光OLEDs,进而将其作为主体材料实现了高效的红光和白光OLEDs器件;接着将该TADF材料作为激基复合物的给体,设计了一种高效率的全荧光WOLEDs,拓展了TADF材料的应用范围;最后,将TADF材料和发光超薄层结合,制备了高性能非掺杂的WOLEDs。具体研究内容如下:1、第二章中,首先对蓝光TADF材料mSOAD进行了研究,制备了非掺杂结构的蓝光OLEDs,所得到的蓝光器件具有14%的高EQE。接着用该蓝光TADF材料作为主体,磷光材料Ir(pq)2acac作为掺杂剂调控激子,制备了高效率的红光和白光OLEDs。红光OLEDs的最大电流效率(CE),功率效率(PE)和EQE分别为32.7 cd A-1,31.0 lm W-1和20.3%;WOLEDs在所有掺杂浓度下都具有高的色稳定性,低的工作电压,最大CE,PE和EQE分别为28.2-32.0 cd A-1,26.3-30.5 lm W-1和12.2-17.4%。2、第三章中,针对mSOAD作为TADF材料本身就具有给受体单元的特性,将其作为给体,PO-T2T作为受体,制备了黄-绿色发光的激基复合物OLEDs,器件的CE,PE和EQE的最大值可分别达到31.4 cd A-1,36.6 lm W-1和9.7%,且具有450-700 nm的宽光谱覆盖范围。进而通过引入传统材料DCJTB作为该激基复合物的红光发射掺杂剂,利用激基复合物主体到掺杂剂之间的不完全能量传递,实现了全荧光WOLEDs。进一步优化器件结构后,所得到的全荧光WOLEDs的CE,PE和EQE分别为30.2 cd A-1,28.0lm W-1和11.6%。同时,全荧光WOLEDs的色稳定性良好,电压从5 V增加到8 V时,色坐标变化仅为(0.030,0.008)。3、第四章中,由于之前的研究均采用了主-客体掺杂结构作为主要的发光层结构,在器件制备过程中出现了掺杂浓度难以精确控制,器件重复性差,制备时各蒸发源相互污染的问题。因此,在本章中设计了具有非掺杂结构的WOLEDs,探讨TADF材料在非掺杂WOLEDs中的应用。用该蓝光TADF材料mSOAD与红色发光的超薄层相结合实现了互补色的白光发射,且器件的性能通过调节发光超薄层的位置和层数可得到极大的提高。具有最佳性能的WOLEDs最大CE,PE和EQE分别达到了31.9 cd A-1,30.4 lm W-1和17.3%。同时,在4-8V激发电压下,CIE值为(0.469±0.008,0.382±0.004),实现了白光器件高的色稳定性。
Abstract
mu qian ,you ji fa guang er ji guan (OLEDs)zuo wei xin yi dai xian shi zhao ming ji shu zheng zou jin ren men de sheng huo ,re huo hua yan chi ying guang (TADF)cai liao zuo wei OLEDsdi san dai fa guang cai liao huo de le yan jiu zhe de an fan guan zhu 。jing guo duo nian de fa zhan ,yan jiu ren yuan yi ge cheng chu hu duo xing neng you yi de TADFcai liao ,lan lu gong san se jun you xiang dui ying de TADFcai liao shi xian le chao guo 20%de wai liang zi xiao lv (EQE),ke yu lin guang cai liao xiang pi mei 。dui yu bai guang you ji fa guang er ji guan (WOLEDs)lai shui ,mu qian da duo shu TADFcai liao dou shi zuo wei fa guang cai liao huo fu zhu can za ji ying yong dao WOLEDszhong yong yi di gao qi jian de xiao lv ,shao shu TADFcai liao ke yi zuo wei can za ji de zhu ti cai liao ,tong guo bu wan quan neng liang chuan di shi xian bai guang fa she 。ke zuo wei zhu ti ju neng you xiao gai shan WOLEDsxing neng de TADFcai liao mu qian reng ran you xian ,er ju TADFcai liao zuo wei zhu ti zai WOLEDszhong de yan jiu hai bu gou ji tong ,yin ci ying dui TADFcai liao zai WOLEDszhong de ying yong jin hang geng shen ru de yan jiu 。ben lun wen yan jiu le yi chong zai fei can za jie gou xia ye neng shi xian gao xiao lv de lan guang TADFcai liao mSOAD,bing tan jiu le ji zai WOLEDszhong de ying yong 。shou xian fen xi le TADFcai liao mSOADben shen de guang dian xing neng ,zhi bei le gao xing neng de lan guang OLEDs,jin er jiang ji zuo wei zhu ti cai liao shi xian le gao xiao de gong guang he bai guang OLEDsqi jian ;jie zhao jiang gai TADFcai liao zuo wei ji ji fu ge wu de gei ti ,she ji le yi chong gao xiao lv de quan ying guang WOLEDs,ta zhan le TADFcai liao de ying yong fan wei ;zui hou ,jiang TADFcai liao he fa guang chao bao ceng jie ge ,zhi bei le gao xing neng fei can za de WOLEDs。ju ti yan jiu nei rong ru xia :1、di er zhang zhong ,shou xian dui lan guang TADFcai liao mSOADjin hang le yan jiu ,zhi bei le fei can za jie gou de lan guang OLEDs,suo de dao de lan guang qi jian ju you 14%de gao EQE。jie zhao yong gai lan guang TADFcai liao zuo wei zhu ti ,lin guang cai liao Ir(pq)2acaczuo wei can za ji diao kong ji zi ,zhi bei le gao xiao lv de gong guang he bai guang OLEDs。gong guang OLEDsde zui da dian liu xiao lv (CE),gong lv xiao lv (PE)he EQEfen bie wei 32.7 cd A-1,31.0 lm W-1he 20.3%;WOLEDszai suo you can za nong du xia dou ju you gao de se wen ding xing ,di de gong zuo dian ya ,zui da CE,PEhe EQEfen bie wei 28.2-32.0 cd A-1,26.3-30.5 lm W-1he 12.2-17.4%。2、di san zhang zhong ,zhen dui mSOADzuo wei TADFcai liao ben shen jiu ju you gei shou ti chan yuan de te xing ,jiang ji zuo wei gei ti ,PO-T2Tzuo wei shou ti ,zhi bei le huang -lu se fa guang de ji ji fu ge wu OLEDs,qi jian de CE,PEhe EQEde zui da zhi ke fen bie da dao 31.4 cd A-1,36.6 lm W-1he 9.7%,ju ju you 450-700 nmde kuan guang pu fu gai fan wei 。jin er tong guo yin ru chuan tong cai liao DCJTBzuo wei gai ji ji fu ge wu de gong guang fa she can za ji ,li yong ji ji fu ge wu zhu ti dao can za ji zhi jian de bu wan quan neng liang chuan di ,shi xian le quan ying guang WOLEDs。jin yi bu you hua qi jian jie gou hou ,suo de dao de quan ying guang WOLEDsde CE,PEhe EQEfen bie wei 30.2 cd A-1,28.0lm W-1he 11.6%。tong shi ,quan ying guang WOLEDsde se wen ding xing liang hao ,dian ya cong 5 Vzeng jia dao 8 Vshi ,se zuo biao bian hua jin wei (0.030,0.008)。3、di si zhang zhong ,you yu zhi qian de yan jiu jun cai yong le zhu -ke ti can za jie gou zuo wei zhu yao de fa guang ceng jie gou ,zai qi jian zhi bei guo cheng zhong chu xian le can za nong du nan yi jing que kong zhi ,qi jian chong fu xing cha ,zhi bei shi ge zheng fa yuan xiang hu wu ran de wen ti 。yin ci ,zai ben zhang zhong she ji le ju you fei can za jie gou de WOLEDs,tan tao TADFcai liao zai fei can za WOLEDszhong de ying yong 。yong gai lan guang TADFcai liao mSOADyu gong se fa guang de chao bao ceng xiang jie ge shi xian le hu bu se de bai guang fa she ,ju qi jian de xing neng tong guo diao jie fa guang chao bao ceng de wei zhi he ceng shu ke de dao ji da de di gao 。ju you zui jia xing neng de WOLEDszui da CE,PEhe EQEfen bie da dao le 31.9 cd A-1,30.4 lm W-1he 17.3%。tong shi ,zai 4-8Vji fa dian ya xia ,CIEzhi wei (0.469±0.008,0.382±0.004),shi xian le bai guang qi jian gao de se wen ding xing 。
论文参考文献
论文详细介绍
论文作者分别是来自太原理工大学的王子琪,发表于刊物太原理工大学2019-07-26论文,是一篇关于热活化延迟荧光论文,白光有机发光二极管论文,激基复合物论文,主体论文,能量传递论文,太原理工大学2019-07-26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,资料来自太原理工大学2019-07-26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:热活化延迟荧光论文; 白光有机发光二极管论文; 激基复合物论文; 主体论文; 能量传递论文; 太原理工大学2019-07-26论文;