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1. 南京邮电大学 有机电子与信息显示国家重点实验室培育基地, 江苏 南京 210023
2. 南京工业大学 先进材料研究院, 江苏 南京 211816
纸质出版日期:2016-8-5,
收稿日期:2016-3-23,
修回日期:2016-4-22,
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由雪萌, 张新稳, 陈月花等. 非掺杂型高效绿色磷光有机电致发光器件[J]. 发光学报, 2016,37(8): 961-966
YOU Xue-meng, ZHANG Xin-wen, CHEN Yue-hua etc. High Efficiency Green Phosphorescent Organic Light Emitting Diodes Using An Ultrathin Nondoped Emitting Layer[J]. Chinese Journal of Luminescence, 2016,37(8): 961-966
由雪萌, 张新稳, 陈月花等. 非掺杂型高效绿色磷光有机电致发光器件[J]. 发光学报, 2016,37(8): 961-966 DOI: 10.3788/fgxb20163708.0961.
YOU Xue-meng, ZHANG Xin-wen, CHEN Yue-hua etc. High Efficiency Green Phosphorescent Organic Light Emitting Diodes Using An Ultrathin Nondoped Emitting Layer[J]. Chinese Journal of Luminescence, 2016,37(8): 961-966 DOI: 10.3788/fgxb20163708.0961.
在空穴传输层TCTA与电子传输层TPBi之间引入磷光染料Ir(ppy)
3
超薄发光层,制备了结构为ITO/MoO
3
(2 nm)/NPB(40 nm)/TCTA(10 nm)/Ir(ppy)
3
(
x
nm)/TPBi(40 nm)/LiF(1 nm)/Al(80 nm)的非掺杂磷光有机电致发光器件。通过调控非掺杂发光层的厚度,详细研究了Ir(ppy)
3
层厚度对器件性能的影响。实验结果表明,当非掺杂发光层厚度为0.2 nm时,器件的性能最好,器件的亮度、效率和外量子效率分别达到26350 cdm
-2
、42.9 cdA
-1
和12.9%。研究结果表明,采用超薄的非掺杂发光层可以简化器件结构和制备工艺,获得高效率的OLED器件。
The nondoped emitting layer (EML) was constructed by introducing a ultrathin layer of pure green phosphorescent dye tris(2-phenylpyridine)iridium between a hole transporting layer TCTA and an electron transporting layer TPBi. The device structure is ITO/MoO
3
(2 nm)/NPB(40 nm)/TCTA(10 nm)/Ir(ppy)
3
(0.1-0.5 nm)/TPBi(40 nm)/LiF(1 nm)/Al(80 nm). The thickness of EML can affect the performance of green phosphorescent organic light emitting diodes (PhOLEDs). By changing the thickness of emitting layers
the best performance of green PhOLEDs can be achieved with a 0.2 nm pure phosphorescent dye. The device exhibits highly efficient green emission with a maximum luminance of 26 350 cdm
-2
a maximum current efficiency of 42.9 cdA
-1
and a maximum external quantum efficiency of 12.9%. These results indicate that the high performance PhOLEDs can be realized with only ultrathin nondoped EMLs in a simple way.
超薄非掺杂发光层有机电致发光二极管激子
ultrathin nondoped emissive layerorganic light-emitting diodesexcitons
胡俊涛,程群,余承东,等. Bphen掺杂Cs2CO3作为电子传输层对OLED器件性能的影响[J].液晶与显示,2015, 30(6):943-948. HU J T, CHENG Q, YU C D, et al.. Impact of Bphen doping Cs2CO3 as electron transport layer on the performance of OLEDs[J]. Chin. J. Liq. Cryst. Disp., 2015, 30(6):943-948. (in Chinese)
武明珠,郭闰达,张振松,等.面向彩色有机微显示的有机白光顶发射器件[J].液晶与显示, 2015, 30(5):790-795. WU M Z, GUO R D, ZHANG Z S, et al.. Top emitting white organic light emitting diodes towards full color organic microdisplay[J]. Chin. J. Liq. Cryst. Disp., 2015, 30(5):790-795. (in Chinese)
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ZHANG X W, GUO X, CHEN Y H, et al.. Highly efficient red phosphorescent organic light-emitting devices based on solution-processed small molecular mixed-host[J]. J. Lumin., 2015, 161:300-305.
ZHANG X W, YANG T, WEI Q, et al.. Arylfluorene based universal hosts for solution-processed RGB and white phosphorescent organic light-emitting devices[J]. RSC Adv., 2015, 5(14):94077-94083.
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. Interf., 2013, 5(3):965-971.
XUE K W, SHENG R, DUAN Y, et al.. Efficient non-doped monochrome and white phosphorescent organic light-emitting diodes based on ultrathin emissive layers[J]. Org. Electron., 2015, 26:451-457.
CHEN S M, ZHAO Z J, TANG B Z, et al.. Non-doped white organic light-emitting diodes based on aggregation-induced emission[J].J. Phys. D-Appl. Phys., 2010, 43(9):095101-1-5.
LIU S M, LI B, ZHANG L M, et al.. Enhanced efficiency and reduced roll-off in nondoped phosphorescent organic light-emitting devices with triplet multiple quantum well structures[J]. Appl. Phys. Lett., 2010, 97(8):083304-1-3.
ZHAO Y B, ZHU L P, CHEN J S, et al.. Improving color stability of blue/orange complementary white OLEDs by using single-host double-emissive layer structure:comprehensive experimental investigation into the device working mechanism[J]. Org. Electron., 2012, 13(8):1340-1348.
JANG J G, SHIN H K. High efficiency green phosphorescent organic light emitting device with (TCTA/TCTA0.5TPBi0.5/TPBi):Ir(ppy)3 emission layer[J]. Thin Solid Films, 2009, 517(14):4122-4126.
LAW C W, LAU K M, FUNG M K, et al.. Effective organic-based connection unit for stacked organic light-emitting devices[J]. Appl. Phys. Lett., 2006, 89(13):133511-1-3.
XIAO L X, CHEN Z J, QU B, et al.. Recent progresses on materials for electrophosphorescent organic light-emitting devices[J]. Adv. Mater., 2011, 23(8):926-952.
HUNG W Y, KE T H, LIN Y T, et al.. Employing ambipolar oligofluorene as the charge-generation layer in time-of-flight mobility measurements of organic thin films[J]. Appl. Phys. Lett., 2006, 88(6):064102-1-3.
YANG X X, DU X Y, TAO S L, et al.. Efficient hole-transporter for phosphorescent organic light emitting diodes with a simple molecular structure[J]. Org. Electron., 2015, 26:481-486.
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