有机电致发光器件的瞬态电响应特性

牛立涛; 关敏; 楚新波; 曾一平; 李弋洋; 张杨

doi:10.3788/fgxb20153606.0699

您当前的位置：

首页 >

文章列表页 >

有机电致发光器件的瞬态电响应特性

器件制备及器件物理 | 更新时间：2020-08-12

- 有机电致发光器件的瞬态电响应特性
- Transient Current Response Characteristics of Organic Light-emitting Diodes
- 发光学报 2015年36卷第6期页码：699-704
- 作者机构：
  
  中国科学院半导体研究所半导体材料科学重点实验室北京,100083
- 作者简介：
- 基金信息：
  
  国家自然科学基金(61274049,61204012)();北京自然科学基金(4132070,4142053)资助项目()
- DOI：10.3788/fgxb20153606.0699
  中图分类号： O472+.4;TN383+.1
- 纸质出版日期：2015-6-3，
  
  收稿日期：2015-3-18，
  
  修回日期：2015-4-19，
扫描看全文
牛立涛, 关敏, 楚新波等. 有机电致发光器件的瞬态电响应特性[J]. 发光学报, 2015,36(6): 699-704

NIU Li-tao, GUAN Min, CHU Xin-bo etc. Transient Current Response Characteristics of Organic Light-emitting Diodes[J]. Chinese Journal of Luminescence, 2015,36(6): 699-704
牛立涛, 关敏, 楚新波等. 有机电致发光器件的瞬态电响应特性[J]. 发光学报, 2015,36(6): 699-704 DOI： 10.3788/fgxb20153606.0699.

NIU Li-tao, GUAN Min, CHU Xin-bo etc. Transient Current Response Characteristics of Organic Light-emitting Diodes[J]. Chinese Journal of Luminescence, 2015,36(6): 699-704 DOI： 10.3788/fgxb20153606.0699.

摘要

详细研究了有机发光二极管(OLED)在脉冲电压下的瞬态电流响应特性。瞬态响应电流由3部分组成:正向电流峰(I

)、稳态电流(I

)及反向电流峰(I

)。研究发现I

为器件工作时通过器件的电流

而I

与I

则分别对应OLED器件电极/有机界面附近的空间电荷的形成及消失过程。I

、I

与脉冲电压成线性关系

阳极的费米能级与空穴传输材料的HOMO能级差导致I

大于I

。利用不同占空比的双脉冲电压研究了电流与空间电荷的关系

发现空间电荷的充分放电临界占空比只受界面接触的影响

而与器件内部结构无关。

Abstract

Detailed transient current response characteristics of organic light-emitting diode (OLED) were investigated. Transient current response curve can be divided into three partitions: positive current spike (I

)

stead-state current (I

) and negative current spike (I

). It is found that the positive and negative current peaks correspond to the charging and discharging process of space charges near electrode/organic interface

respectively. Linear relationship between the current spikes and pulsed voltage amplitude is found. Larger I

than I

is induced by the difference between Femi level of electrode and the highest occupied orbital level (HOMO) of organic materials. Different duty-ration dual pulsed voltages are modulated to investigate the relation between current response and space charges. It is found the space charge charging and discharging threshold duty-ration is only depended on the hole injection barrier and independent with internal device structure.

关键词

有机发光二极管瞬态电流响应界面空间电荷

Keywords

organic light-emitting diodetransient current responseinterfacespace charges

references

Chu X B, Guan M, Zhang Y, et al. ITO-free and air stable organic light-emitting diodes using MoO3:PTCDA modified Al as semitransparent anode [J]. RSC Adv., 2013, 3:9509-9513.

Guan M, Li L S, Cao G H, et al. Organic light-emitting diodes with integrated inorganic photo detector for near-infrared optical up-conversion [J]. Org. Electron., 2011, 12(12):2090-2094.

Chu X B, Guan M, Li L S, et al. Improved efficiency of organic/inorganic hybrid near-infrared light upconverter by device optimization [J]. ACS Appl. Mater. Interf., 2012, 4:4976-4980.

Li Y H, Wu C L, Yang J L, et al. Simulation calculation and preparation of top emitting OLEDs with transparent anode of MoO3/Ag/MoO3 [J]. Chin. J. Lumin.(发光学报), 2015, 36(4):459-465 (in Chinese).

Wang L, Wu X M, Hua Y L, et al. Improvement of performance of a blue organic light-emitting diode by inserting charge control layers [J]. Chin. J. Lumin.(发光学报), 2014, 35(1):84-89 (in Chinese).

Prache O. Active matrix molecular OLED microdisplays [J]. Displays, 2001, 22:49-56.

Chen J, Wang Q S. Recent progress of infrared upconversion device based on the integration of OLED [J]. Chin. Opt.(中国光学), 2015, 8(1):17-27 (in Chinese).

You H, Dai Y F, Zhang Z Q, et al. Improved performances of organic light-emitting diodes with metal oxide as anode buffer [J]. J. Appl. Phys., 2007, 101:026105-1-5.

Wang F X, Qiao X F, Xiong T, et al. The role of molybdenum oxide as anode interfacial modification in the improvement of efficiency and stability in organic light-emitting diodes [J]. Org. Electron., 2008, 9:985-993.

Gao C H, Zhu X Z, Zhang L, et al. Comparative studies on the inorganic and organic p-type dopants in organic light-emitting diodes with enhanced hole injection [J]. Appl. Phys. Lett., 2013, 102(15):153301-1-3.

Niu L T, Guan M, Chu X B, et al. Overshoot effect and inflexion characteristics in transient electroluminescence of hybrid phosphorescent OLEDs [J]. J. Phys. D: Appl. Phys., 2015, 48(5):055103-1-5.

Kwok H L. Modeling negative capacitance effect in organic polymers [J]. Solid-State Electron., 2003, 47:1089-1093.

Okumoto H, Tsutsui T. A source of negative capacitance in organic electronic devices observed by impedance spectroscopy: Self-heating effects [J]. Appl. Phys. Express, 2014, 7(6):061601-1-4.

Pingree L S C, Scott B J, Russell M T, et al. Negative capacitance in organic light-emitting diodes [J]. Appl. Phys. Lett., 2005, 86(7):073509-1-3.

Mamada M, Ergun S, Prez-Bolivar C, et al. Charge transport, carrier balance, and blue electrophosphorescence in diphenyl [4-(triphenylsilyl)phenyl] phosphine oxide devices [J]. Appl. Phys. Lett., 2001, 98(7):073305-1-3.

Matsushima T, Kinoshita Y, Murata H. Formation of Ohmic hole injection by inserting an ultrathin layer of molybdenum trioxide between indium tin oxide and organic hole-transporting layers [J]. Appl. Phys. Lett., 2007, 91(25):253504-1-3.

Matsushima T, Murata H. Observation of space-charge-limited current due to charge generation at interface of molybdenum dioxide and organic layer [J]. Appl. Phys. Lett., 2009, 95(20):203306-1-3.

Smith R, Rose A. Space-charge-limited currents in single crystals of cadmium sulfide [J]. Phys. Rev., 1955, 97:1531-1537.

Lampert M. Simplified theory of space-charge-limited currents in an insulator with traps [J]. Phys. Rev., 1956, 103:1648-1656.

Lin M T, Li M, Chen W H, et al. Transient electroluminescence determination of carrier mobility and charge trapping effects in heavily doped phosphorescent organic light-emitting diodes [J]. Solid-State Electron., 2011, 56:196-200.

Moon D G, Pode R B, Lee C J, et al. Transient electrophosphorescence in red top-emitting organic light-emitting devices [J]. Appl. Phys. Lett., 2004, 85(20):4771-4773.

Mu H, Reddy I, Hunt J, et al. Electron mobility characterization in OLEDs from AC small signal optical modulation [J]. J. Phys. D: Appl. Phys., 2010, 43(19):195103-1-5.

Teramura A, Nakano Y, Sakuma Y, et al. Markedly different rise and fall times in transient electroluminescence of 4,4'-N,N'-dicarbazolylbiphenyl:fac-tris(2-phenylpyridinate) iridium(Ⅲ)-based organic light emitting diodes [J]. Jpn. J. Appl. Phys., 2009, 48(11):111505-1-5.

Xie Z Y, Wong T C, Hung L S, et al. Transient electroluminescence of organic quantum-well light-emitting diodes [J]. Appl. Phys. Lett., 2002, 80(9):1477-1479.

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

纯有机电致室温磷光材料与器件研究进展

Pd/p-GaN欧姆接触退化机理

OLEDs瞬态延迟时间的模拟及在信号通讯的应用

Ir配合物染料调节有机发光二极管发光特性

低电压有机薄膜晶体管驱动顶发射有机发光二极管的集成像素的研制