Transient Current Response Characteristics of Organic Light-emitting Diodes

NIU Li-tao; GUAN Min; CHU Xin-bo; ZENG Yi-ping; LI Yi-yang; ZHANG Yang

doi:10.3788/fgxb20153606.0699

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Transient Current Response Characteristics of Organic Light-emitting Diodes

更新时间：2020-08-12

- Transient Current Response Characteristics of Organic Light-emitting Diodes
- Chinese Journal of Luminescence Vol. 36, Issue 6, Pages: 699-704(2015)
- 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：
- DOI：10.3788/fgxb20153606.0699
  CLC： O472+.4;TN383+.1
- Received：18 March 2015，
  
  Revised：19 April 2015，
  
  Published：03 June 2015
- 稿件说明：
移动端阅览
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

Keywords

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.

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