Optimization of Excimer Forming Zone and Doping Engineering in Ultraviolet Organic Light-emitting Device

MO Bing-jie; LIU Li-ming; WANG Hong-hang; YOU Feng-jiao; WEI Bin; ZHANG Xiao-wen

doi:10.3788/fgxb20163702.0213

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Optimization of Excimer Forming Zone and Doping Engineering in Ultraviolet Organic Light-emitting Device

更新时间：2020-08-12

- Optimization of Excimer Forming Zone and Doping Engineering in Ultraviolet Organic Light-emitting Device
- Chinese Journal of Luminescence Vol. 37, Issue 2, Pages: 213-218(2016)
- 作者机构：
  
  1. 上海大学新型显示技术及应用集成教育部重点实验室上海,200072
  2. 桂林电子科技大学广西信息材料重点实验室,广西桂林,541004
  3. 电子科技大学中山学院电子薄膜与集成器件国家重点实验室中山分室,广东中山,528402
  4. 广西信息科学实验中心,广西桂林,541004
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20163702.0213
  CLC： TN383+.1
- Received：27 October 2015，
  
  Revised：10 December 2015，
  
  Published：10 February 2016
- 稿件说明：
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莫炳杰, 刘黎明, 王红航等. 紫外有机发光器件的激子形成区域优化与掺杂调控[J]. 发光学报, 2016,37(2): 213-218

MO Bing-jie, LIU Li-ming, WANG Hong-hang etc. Optimization of Excimer Forming Zone and Doping Engineering in Ultraviolet Organic Light-emitting Device[J]. Chinese Journal of Luminescence, 2016,37(2): 213-218
莫炳杰, 刘黎明, 王红航等. 紫外有机发光器件的激子形成区域优化与掺杂调控[J]. 发光学报, 2016,37(2): 213-218 DOI： 10.3788/fgxb20163702.0213.

MO Bing-jie, LIU Li-ming, WANG Hong-hang etc. Optimization of Excimer Forming Zone and Doping Engineering in Ultraviolet Organic Light-emitting Device[J]. Chinese Journal of Luminescence, 2016,37(2): 213-218 DOI： 10.3788/fgxb20163702.0213.

摘要

采用空穴传输兼发光层CBP和电子传输兼发光层TAZ构建了紫外有机电致发光器件(UVOLED)

通过调控功能层厚度可以优化激子形成区域

进而改善器件性能。实验结果表明:CBP厚度的变化对器件性能影响甚微

而TAZ厚度变化则有显著影响。当CBP和TAZ厚度分别为50 nm和30 nm时

获得了最大辐照度为4.4 mW/cm

@270 mA/cm

、外量子效率(EQE)为0.94%@12.5 mA/cm

发光来自于CBP主发光峰~410 nm以及TAZ肩峰~380 nm的UVOLED器件。在此基础上

通过在CBP/TAZ界面引入超薄[CBP: TAZ]掺杂层可以加速激子复合

降低器件驱动电压

同时还有利于改善载流子平衡性

提高发光效率(最大EQE达到了0.97%@20 mA/cm

)而不影响光谱特性。

Abstract

Ultraviolet organic light-emitting devices (UVOLEDs) were constructed by using hole-transport-emitting layer of 4

4'-bis(carbazol-9-yl)biphenyl (CBP) and electron-transport-emitting layer of 3-(4-biphenyl)-4-phenyl-5-tert-butylphenyl-1

4-triazole (TAZ). The excimer forming zone was optimized by adjusting the functional layer thickness

which contriuted to device performance improvement. Our results indicate that the thickness variation of CBP has negligible effect on device performance while that of TAZ shows considerable effect. The maximum radiance of 4.4 mW/cm

@270 mA/cm

and external quantum efficiency (EQE) of 0.94%@12.5 mA/cm

are achieved in UVOLED with optimal thickness of 50 nm CBP and 30 nm TAZ. The electroluminescence peak of ~410 nm and shoulder of ~380 nm

resulted from CBP and TAZ

respectively

are observed. Moreover

an ultrathin layer of[CBP:TAZ] inserted between CBP and TAZ accelerates excimer recombination rate and reduces driving voltage. Meanwhile

the carrier balance is improved and thus device efficiency is slightly promoted (the maximum EQE reaches 0.97%@20 mA/cm

) without altering spectrum characteristics.

关键词

Keywords

references

LIAN J R, NIU F F, LIU Y W, et al..Efficient near ultraviolet organic light-emitting devices based on star-configured carbazole emitters [J]. Curr. Appl. Phys., 2011, 11(3):295-297.

ZHANG X W, MO B J, YOU F J, et al..Electroluminescence enhancement in ultraviolet organic light-emitting diode with graded hole-injection and-transporting structure [J]. Phys. Stat. Sol. Rapid Res. Lett., 2015, 9(6):353-357.

NG A M C, DJURIIC A B, TAM K H, et al.. 3, 4, 9, 10-Perylenetetracarboxylicdiimide as an interlayer for ultraviolet organic light emitting diodes [J]. Opt. Commun., 2008, 281(9):2498-2503.

ZHANG Q, ZHANG H, ZHANG X W, et al..Exciplex formation and electroluminescent absorption in ultraviolet organic light-emitting diodes [J]. Chin. Phys. B, 2015, 24(2):024222.

ZHANG Q, ZHANG X W, WEI B. Highly efficient ultraviolet organic light-emitting diodes and interface study using impedance spectroscopy [J]. Optik, 2015, 126(18):1595-1597.

ICHIKAWA M, KOBAYASHI K, KOYAMA T, et al..Intense and efficient ultraviolet electroluminescence from organic light-emitting devices with fluorinated copper phthalocyanine as hole injection layer [J]. Thin Solid Films, 2007, 515(7-8):3932-3935.

ZOU L, SAVVATEEV V, BOOHER J, et al..Combinatorial fabrication and studies of intense efficient ultraviolet-violet organic light-emitting device arrays [J]. Appl. Phys. Lett., 2001, 79(14):2282-2284.

YU T Z, SU W M, LI W L, et al..Ultraviolet electroluminescence from organic light-emitting diode with cerium (Ⅲ)-crown ether complex [J]. Solid State Electron., 2007, 51(6):894-899.

DATT B M, BABA A, SAKURAI T, et al.. Electronic states at 4, 4'-N, N'-dicarbazol-biphenyl (CBP)-metal (Mg, Ag, and Au) interfaces: a joint experimental and theoretical study [J]. Curr. Appl. Phys., 2011, 11(3):346-352.

YANG Y X, COHN P, EOM S H, et al..Ultraviolet-violet electroluminescence from highly fluorescent purines [J]. J. Mater. Chem. C, 2013, 1(16):2867-2874.

MANNA E, FUNGURA F, BISWAS R, et al..Tunable near UV microcavity OLED arrays: characterization and analytical applications [J]. Adv. Funct. Mater., 2015, 25(8):1226-1232.

HELLERICH E S, MANNA E, HEISE R, et al..Deep blue/ultraviolet microcavity OLEDs based on solution-processed PVK: CBP blends [J]. Org. Electron., 2015, 24:246-253.

ZHANG X W, JIANG X Y, KHAN M A, et al..Colour tunability of blue top-emitting organic light-emitting devices with single-mode resonance and improved performance by using C60 capping layer and dual emission layer [J]. J. Phys. D: Appl. Phys., 2009, 42(14):145106.

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