Trap-Assisted Recombination in Disordered Organic Semiconductors

被引：268

作者：

Kuik, M. ^{[1
]}

Koster, L. J. A. ^{[1
]}

Wetzelaer, G. A. H. ^{[1
]}

Blom, P. 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：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 25期

关键词：

LIGHT-EMITTING-DIODES; SOLAR-CELLS; ELECTRON;

D O I：

10.1103/PhysRevLett.107.256805

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The trap-assisted recombination of electrons and holes in organic semiconductors is investigated. The extracted capture coefficients of the trap-assisted recombination process are thermally activated with an identical activation energy as measured for the hole mobility mu(p). We demonstrate that the rate limiting step for this mechanism is the diffusion of free holes towards trapped electrons in their mutual Coulomb field, with the capture coefficient given by (q/epsilon)mu(p). As a result, both the bimolecular and trap-assisted recombination processes in organic semiconductors are governed by the charge carrier mobilities, allowing predictive modeling of organic light-emitting diodes.

引用

页数：5

共 29 条

[11] Recombination via tail states in polythiophene: fullerene solar cells
Kirchartz, Thomas
Pieters, Bart E.
Kirkpatrick, James
Rau, Uwe
Nelson, Jenny
[J]. PHYSICAL REVIEW B, 2011, 83 (11):
[12] 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)
[13] 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
[14] Determination of the trap-assisted recombination strength in polymer light emitting diodes
Kuik, Martijn
Nicolai, Herman T.
Lenes, Martijn
Wetzelaer, Gert-Jan A. H.
Lu, Mingtao
Blom, Paul W. M.
[J]. APPLIED PHYSICS LETTERS, 2011, 98 (09)
[15] Langevin P, 1903, ANN CHIM PHYS, V28, P433
[16] 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)
[17] 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
[18] Electron traps in semiconducting polymers: Exponential versus Gaussian trap distribution
Nicolai, H. T.
Mandoc, M. M.
Blom, P. W. M.
[J]. PHYSICAL REVIEW B, 2011, 83 (19):
[19] Hole transport in blue and white emitting polymers
Parshin, Mikhail A.
Ollevier, Jeroen
Van der Auweraer, Mark
de Kok, Margreet M.
Nicolai, Herman T.
Hof, Andre J.
Blom, Paul W. M.
[J]. JOURNAL OF APPLIED PHYSICS, 2008, 103 (11)
[20] Unified description of charge-carrier mobilities in disordered semiconducting polymers
Pasveer, WF
Cottaar, J
Tanase, C
Coehoorn, R
Bobbert, PA
Blom, PWM
de Leeuw, DM
Michels, MAJ
[J]. PHYSICAL REVIEW LETTERS, 2005, 94 (20)

← 1 2 3 →