Determination of the trap-assisted recombination strength in polymer light emitting diodes

被引：52

作者：

Kuik, Martijn ^{[1
]}

Nicolai, Herman T. ^{[1
]}

Lenes, Martijn ^{[1
]}

Wetzelaer, Gert-Jan A. H. ^{[1
]}

Lu, Mingtao ^{[1
]}

Blom, Paul W. M. ^{[1
,2
]}

机构：

[1] Univ Groningen, Zernike Inst Adv Mat, NL-9747 AG Groningen, Netherlands

[2] Holst Ctr, NL-5656 AE Eindhoven, Netherlands

来源：

APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 09期

关键词：

POLY(P-PHENYLENE VINYLENE); SOLAR-CELLS; DEPENDENCE; MOBILITY; TRANSPORT; ELECTRON; EMISSION; DEVICES;

D O I：

10.1063/1.3559911

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The recombination processes in poly(p-phenylene vinylene) based polymer light-emitting diodes (PLEDs) are investigated. Photogenerated current measurements on PLED device structures reveal that next to the known Langevin recombination also trap-assisted recombination is an important recombination channel in PLEDs, which has not been considered until now. The dependence of the open-circuit voltage on light intensity enables us to determine the strength of this process. Numerical modeling of the current-voltage characteristics incorporating both Langevin and trap-assisted recombination yields a correct and consistent description of the PLED, without the traditional correction of the Langevin prefactor. At low bias voltage the trap-assisted recombination rate is found to be dominant over the free carrier recombination rate. (C) 2011 American Institute of Physics. [doi:10.1063/1.3559911]

引用

页数：3

共 27 条

[11] Ideal diode equation for organic heterojunctions. I. Derivation and application
Giebink, N. C.
Wiederrecht, G. P.
Wasielewski, M. R.
Forrest, S. R.
[J]. PHYSICAL REVIEW B, 2010, 82 (15):
[12] ANGULAR-DEPENDENCE OF THE EMISSION FROM A CONJUGATED POLYMER LIGHT-EMITTING DIODE - IMPLICATIONS FOR EFFICIENCY CALCULATIONS
GREENHAM, NC
FRIEND, RH
BRADLEY, DDC
[J]. ADVANCED MATERIALS, 1994, 6 (06) : 491 - 494
[13] Bimolecular recombination in polymer electronic devices
Groves, C.
Greenham, N. C.
[J]. PHYSICAL REVIEW B, 2008, 78 (15)
[14] ELECTRON-HOLE RECOMBINATION IN GERMANIUM
HALL, RN
[J]. PHYSICAL REVIEW, 1952, 87 (02): : 387 - 387
[15] Device model for the operation of polymer/fullerene bulk heterojunction solar cells
Koster, LJA
Smits, ECP
Mihailetchi, VD
Blom, PWM
[J]. PHYSICAL REVIEW B, 2005, 72 (08)
[16] Light intensity dependence of open-circuit voltage of polymer:fullerene solar cells -: art. no. 123509
Koster, LJA
Mihailetchi, VD
Ramaker, R
Blom, PWM
[J]. APPLIED PHYSICS LETTERS, 2005, 86 (12) : 1 - 3
[17] Langevin P, 1903, ANN CHIM PHYS, V28, P433
[18] Effect of traps on the performance of bulk heterojunction organic solar cells
Mandoc, M. M.
Kooistra, F. B.
Hummelen, J. C.
de Boer, B.
Blom, P. W. M.
[J]. APPLIED PHYSICS LETTERS, 2007, 91 (26)
[19] Trap-limited electron transport in disordered semiconducting polymers
Mandoc, M. M.
de Boer, B.
Paasch, G.
Blom, P. W. M.
[J]. PHYSICAL REVIEW B, 2007, 75 (19):
[20] Origin of the reduced fill factor and photocurrent in MDMO-PPV:PCNEPV all-polymer solar cells
Mandoc, M. Magdalena
Veurman, Welmoed
Koster, L. Jan Anton
de Boer, Bert
Blom, Paul W. M.
[J]. ADVANCED FUNCTIONAL MATERIALS, 2007, 17 (13) : 2167 - 2173

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