本文選題：有機電致發(fā)光器件 + 雙母體��； 參考：《吉林大學(xué)》2017年碩士論文

【摘要】：有機電致發(fā)光器件(OLED)由于具有高的發(fā)光效率、柔性、自發(fā)光、可視化角度大、高亮度以及高的對比度等優(yōu)點,在固態(tài)照明領(lǐng)域、平板顯示領(lǐng)域和LCD背光源領(lǐng)域具有潛在的應(yīng)用。但是,在商業(yè)化應(yīng)用中OLED還面臨很多技術(shù)難題。器件的結(jié)構(gòu)復(fù)雜,生產(chǎn)工藝不容易控制和生產(chǎn)成本高等特點制約著OLED的發(fā)展。在本論文中,我們采用雙母體的結(jié)構(gòu)來平衡器件中載流子的傳輸,并且在對器件性能進行探究的同時,對器件結(jié)構(gòu)進行簡化。首先,基于雙極性傳輸能力的4,4'-Bis(carbazol-9-yl)biphenyl(CBP),我們制作了一個結(jié)構(gòu)簡單的黃光對比器件。該器件結(jié)構(gòu)簡單,不包含任何載流子傳輸層。由于母體CBP的電子傳輸能力相對空穴傳輸能力較差,其最大效率分別只達到了20.7 cd/A和6.9 lm/W。為了進一步優(yōu)化器件性能,我們制作了基于雙母體結(jié)構(gòu)CBP:1,3,5-tris(2-N-pheylbenzimidazolyl)benzene(TPBi)的簡單結(jié)構(gòu)單發(fā)光層黃光器件。我們通過改變雙母體的摻雜比例來平衡發(fā)光層中空穴和電子的傳輸和復(fù)合,從而提高器件的性能。其最大效率分別為37.1 cd/A和33.3 lm/W。通過對單載流子器件進行分析我們還發(fā)現(xiàn)黃光發(fā)光材料iridium(Ⅲ)bis(4-phenylthieno-[3,2-c]pyridinato-N,C20)acety-lacetonate(PO-01)促進了空穴和電子的傳輸,進一步提高了器件的性能。其次,基于上述黃光器件雙母體的平衡載流子的能力,我們制備了結(jié)構(gòu)簡單的高效、色穩(wěn)定性好的兩色白光器件。其中,我們在藍光層Bis(3,5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyridyl)iridium(Ⅲ)(FIr Pic)中采用雙母體4,4',4"-tris(Ncarbazolyl)triphenylamine(TCTA):TPBi的結(jié)構(gòu),在黃光層PO-01中我們采用電子傳輸能力強的TPBi。通過調(diào)節(jié)藍光層中TCTA和TPBi的摻雜比例,我們得到色穩(wěn)定性好的兩色簡單結(jié)構(gòu)白光器件,其最大效率分別為45.5 lm/W和43.5 cd/A。其中,雙母體TCTA:TPBi摻雜比例為1:5的器件顯示了好的色穩(wěn)定性,其色坐標(biāo)從亮度114 cd/m~2變化到10 550 cd/m~2,色坐標(biāo)只變化了(-0.016,-0.006)�；诙坠馄骷䥺l(fā),我們在二色白光器件的黃光層中,加入紅光發(fā)光材料Ir(MDQ)2(acac)。通過調(diào)節(jié)紅光材料的摻雜比例,我們得到了色穩(wěn)定性好的三色白光器件,其最大效率分別為32.8 lm/W和31.3 cd/A。
[Abstract]:Due to its advantages of high luminescence efficiency, flexibility, self-luminescence, high visualization angle, high brightness and high contrast, organic electroluminescent devices have potential applications in the field of solid-state lighting, flat panel display and LCD backlight. However, OLED still faces a lot of technical problems in commercial application. The development of OLED is restricted by its complex structure, difficult control of production process and high production cost. In this thesis, we use the dual-parent structure to balance the carrier transmission in the device, and at the same time, simplify the device structure while exploring the performance of the device. Firstly, we have fabricated a simple yellow light contrast device based on a bipolar carbazol-9-ylbiphenyl CBP. The device is simple in structure and does not contain any carrier transport layer. The maximum efficiency of the parent CBP is only 20.7 cd/A and 6.9 lm / W, respectively, due to its poor electron transport capacity compared with the hole-hole transport. In order to further optimize the performance of the device, we have fabricated a simple single-layer yellow light emitting device based on the dual-parent structure CBP: 1 / 3 and 5-trisanine 2-N-pheylbenzimidazolium benzeneo (TPBi). We balance the transport and recombination of holes and electrons in the luminescent layer by changing the doping ratio of the double parent to improve the performance of the device. The maximum efficiency was 37.1 cd/A and 33.3 lm / W. Through the analysis of single-carrier devices, we also find that the yellow photoluminescence material iridium (鈪，

本文編號：1918634