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西安理工大学 电子工程系,陕西 西安,710048
纸质出版日期:2015-6-3,
网络出版日期:2015-4-21,
收稿日期:2015-3-8,
修回日期:2015-4-13,
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安涛, 李朋, 杜牧涵等. 超薄发光层结构的荧光型白光有机发光器件[J]. 发光学报, 2015,36(6): 645-650
AN Tao, LI Peng, DU Mu-han etc. Performance of Fluorescent White Organic Light-emitting Device by Introducing Ultrathin Emitting Layer[J]. Chinese Journal of Luminescence, 2015,36(6): 645-650
安涛, 李朋, 杜牧涵等. 超薄发光层结构的荧光型白光有机发光器件[J]. 发光学报, 2015,36(6): 645-650 DOI: 10.3788/fgxb20153606.0645.
AN Tao, LI Peng, DU Mu-han etc. Performance of Fluorescent White Organic Light-emitting Device by Introducing Ultrathin Emitting Layer[J]. Chinese Journal of Luminescence, 2015,36(6): 645-650 DOI: 10.3788/fgxb20153606.0645.
使用蓝、绿、红超薄发光层结构来制备荧光型非掺杂白光器件
其器件结构为ITO/MoO
3
(5 nm)/TCTA(40 nm)/C545T(1 nm)/TCTA(2 nm)/BePP
2
(1 nm)/Bphen(2 nm)/DCJTB(1 nm)/Bphen(30 nm)/LiF(1 nm)/Al(1 000 nm)。白光器件的最大发光亮度和电流效率分别为16 154.73 cd/m
2
和11.58 cd/A。在电压为 7 V时
器件的色坐标为(0.322 2
0.335 1)
而且色坐标在大的电压变化范围内的变化值仅为(0.017 4
0.002 9)。与掺杂结构的白光器件相比
超薄发光层结构的白光器件拥有高的电流效率和稳定的电致发光光谱
原因是超薄发光层结构的载流子捕获效应能使激子有效限制在复合区域内。
Fluorescent nondoped white organic light-emitting diodes (WOLEDs) were fabricated by using three ultrathin layers
including red
green and blue
separately monochromatic emission layers. The structure of the device is ITO/MoO
3
(5 nm)/TCTA(40 nm)/C545T(1 nm)/TCTA(2 nm)/BePP
2
(1 nm)/Bphen(2 nm)/DCJTB(1 nm)/Bphen(30 nm)/LiF(1 nm)/Al(1 000 nm). The maximum luminance and current efficiency reach 16 154.73 cd/m
2
and 11.58 cd/A
respectively. The Commissions Internationale De L'Eclairage (CIE) coordinates at (0.322 2
0.335 1) are observed at 7 V bias and show a very slight variation of (0.017 4
0.002 9) in a wide range of voltages. Compared with doped white structure device
ultrathin structure white device has high current efficiency and stable electroluminescence spectrum
which is attribute to the excitons being confined effectively in the recombination zone by the charge trapping effect of ultrathin layers.
有机半导体荧光材料超薄发光层白光有机发光器件
organic semiconductorfluorescent materialultrathin emitting layerwhite organic light-emitting devices
Gao Q, Yin Y M, Yu J, et al. High-efficiency phosphorescent organic light-emitting devices based on bipolar host [J]. Chin. J. Lumin.(发光学报), 2014, 35(6):717-721 (in Chinese).
Ji Y C, Liu S H, Liu W B, et al. One-direction-emission red transparent organic Light-emitting devices [J]. Chin. J. Lumin.(发光学报), 2014, 35(11):1354-1358 (in Chinese).
Li W L, Wu C L, Miao Y Q, et al. TiO2 doped Alq3 as emitting layer to improve the anti-aging performance of OLED [J]. Chin. J. Lumin.(发光学报), 2015, 36(2):219-224 (in Chinese).
Zhang C H, Qin L, Wang H J. Luminescence properties of red phosphorescent microcavity organic light-emitting devices[J]. Chin. J. Lumin.(发光学报), 2014, 35(12):1464-1468 (in Chinese).
Ye J, Wang K, Chen Z, et al. Constructing a novel single-layer white organic light-emitting device through a new sky-blue fluorescent bipolar host [J]. Org. Electron., 2014, 15(12):3514-3520.
Chang H W, Kim Y H, Lee J, et al. Color-stable, ITO-free white organic light-emitting diodes with enhanced efficiency using solution-processed transparent electrodes and optical outcoupling layers [J]. Org. Electron., 2014, 15(5):1028-1034.
Joo C W, Moon J, Han J H, et al. Color temperature tunable white organic light-emitting diodes [J]. Org. Electron., 2014, 15(1):189-195.
Klubek K P, Tang C W, Rothberg L J. Investigation of blue phosphorescent organic light-emitting diode host and dopant stability [J]. Org. Electron., 2014, 15(7):1312-1316.
Zhao Y B, Chen J S, Ma D G. Realization of high efficiency orange and white organic light emitting diodes by introducing an ultra-thin undoped orange emitting layer [J]. Appl. Phys. Lett., 2011, 99(16):163303-1-3.
Divayana Y, Sun X W. An efficient bis (2-phenylquinoline) (acetylacetonate) iridium(Ⅲ)-based red organic light-emitting diode with alternating guest: Host emitting layers [J]. Org. Electron., 2009, 10(2):320-325.
Yu J S, Zhang W, Wen W, et al. Film thickness influence of dual iridium complex ultrathin layers on the performance of nondoped white organic light-emitting diodes [J]. Displays, 2011, 32(2):87-91.
Zhao Y B, Chen J S, Ma D G. Ultrathin nondoped emissive layers for efficient and simple monochrome and white organic light-emitting diodes [J]. ACS Appl. Mater. Interfaces, 2013, 5(3):967-971.
Xue Q, Xie G H, Liu S Y, et al. Distinguishing triplet energy transfer and trap-assisted recombination in multi-color organic light-emitting diode with an ultrathin phosphorescent emissive layer [J]. J. Appl. Phys., 2014, 115(11):114504-1-6.
Shi X D, Liu J, Wang J, et al. High efficiency green phosphorescent top-emitting organic light-emitting diode with ultrathin non-doped emissive layer [J]. Org. Electron., 2014, 15(10):2408-2413.
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