A metrology perspective on the dark injection transient current method for charge mobility determination in organic semiconductors

被引:18
作者
Esward, T. [1 ]
Knox, S. [1 ]
Jones, H. [2 ]
Brewer, P. [1 ]
Murphy, C. [1 ]
Wright, L. [1 ]
Williams, J. [1 ]
机构
[1] Natl Phys Lab, Teddington TW11 0LW, Middx, England
[2] Univ Southampton, Southampton SO17 1BJ, Hants, England
关键词
LIGHT-EMITTING-DIODES; OHMIC HOLE INJECTION; CONJUGATED POLYMER; ADMITTANCE SPECTROSCOPY; POLYFLUORENE COPOLYMER; LIMITED CURRENTS; TRANSPORT; GREEN; MODEL;
D O I
10.1063/1.3580256
中图分类号
O59 [应用物理学];
学科分类号
摘要
Charge mobility is a key parameter for understanding the performance of organic semiconductor devices and materials. A range of techniques is available that can measure charge mobility with varying accuracy and precision. In this paper we analyze the dark injection transient current (DITC) method from a metrology perspective. We carried out a systematic study of the sensitivity of single carrier analogues of organic light-emitting diodes (OLEDs) to small changes in electrical input and environmental conditions. We observed that the experimental results depend strongly on the previous history of the device under test, with both long term and short term effects in evidence. Our findings demonstrate the need for caution in interpreting the results of single experiments to determine the charge mobility of OLEDs and the difficulty of associating uncertainty statements with the results of charge mobility measurements. [doi:10.1063/1.3580256]
引用
收藏
页数:8
相关论文
共 33 条
[1]   BEHAVIOR OF AN IDEAL INJECTING CONTACT ON A TRAP-FREE POLYMER [J].
ABKOWITZ, M ;
FACCI, JS ;
STOLKA, M .
APPLIED PHYSICS LETTERS, 1993, 63 (14) :1892-1894
[2]  
[Anonymous], 1940, CHEM ED, DOI DOI 10.1021/ED018P249.1
[3]   Highly efficient near-infrared hybrid organic-inorganic nanocrystal electroluminescence device (vol 92, art no 153311, 2008) [J].
Bourdakos, K. N. ;
Dissanayake, D. M. N. M. ;
Lutz, T. ;
Silva, S. R. P. ;
Curry, R. J. .
APPLIED PHYSICS LETTERS, 2008, 92 (20)
[4]   Highly efficient near-infrared hybrid organic-inorganic nanocrystal electroluminescence device [J].
Bourdakos, K. N. ;
Dissanayake, D. M. N. M. ;
Lutz, T. ;
Silva, S. R. P. ;
Curry, R. J. .
APPLIED PHYSICS LETTERS, 2008, 92 (15)
[5]   Influence of carrier injection on the electromodulation response of trap-rich polymer light-emitting diodes [J].
Brewer, P. J. ;
deMello, A. J. ;
deMello, J. C. ;
Lane, P. A. ;
Bradley, D. D. C. ;
Fletcher, R. ;
O'Brien, J. .
JOURNAL OF APPLIED PHYSICS, 2006, 99 (11)
[6]   Internal field screening in polymer light-emitting diodes [J].
Brewer, PJ ;
Lane, PA ;
deMello, AJ ;
Bradley, DDC ;
deMello, JC .
ADVANCED FUNCTIONAL MATERIALS, 2004, 14 (06) :562-570
[7]   Transient and steady-state space-charge-limited currents in polyfluorene copolymer diode structures with ohmic hole injecting contacts [J].
Campbell, AJ ;
Bradley, DDC ;
Antoniadis, H ;
Inbasekaran, M ;
Wu, WSW ;
Woo, EP .
APPLIED PHYSICS LETTERS, 2000, 76 (13) :1734-1736
[8]   Direct measurement of conjugated polymer electronic excitation energies using metal/polymer/metal structures [J].
Campbell, IH ;
Hagler, TW ;
Smith, DL ;
Ferraris, JP .
PHYSICAL REVIEW LETTERS, 1996, 76 (11) :1900-1903
[9]  
ESWARD T, 2010, MS5 NAT PHYS LAB
[10]  
GAMOTA D, 2008, IEEE STANDARD TEST M