Intensity dependent but temperature independent charge carrier generation in organic photodiodes and solar cells

被引:15
作者
Christ, Nico [1 ]
Kettlitz, Siegfried W.
Valouch, Sebastian
Mescher, Jan
Nintz, Mirco
Lemmer, Uli
机构
[1] Karlsruhe Inst Technol, LTI, D-76131 Karlsruhe, Germany
关键词
Transient photoresponse of organic solar cells and photodiodes; Nonlinear loss of charge carriers; Temperature independent charge carrier generation; Field dependent charge transfer dissociation; Comparison of simulation and measurements; Multiple-trapping-model; FIELD-ASSISTED DISSOCIATION; THIN-FILMS; RECOMBINATION; EXCITONS; PHOTOCURRENT; MORPHOLOGY; STATES;
D O I
10.1016/j.orgel.2013.01.011
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Measurements of the transient photoresponse of organic photodiodes and solar cells show a strong saturation effect in the quantum efficiency at laser fluences above approximately 3.3 mu J/cm(2). By a comparison of the measured intensity, temperature and field dependence of the transient pulse responses with extended drift-diffusion simulations, the loss of charge carriers can be traced back to a quadratic loss channel in the charge carrier generation process. In contrast to the predictions of the commonly used Onsager-Braun charge carrier generation model, we demonstrate that the dissociation of bound electron-hole-pairs is temperature independent but slightly field dependent. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:973 / 978
页数:6
相关论文
共 38 条
[1]   Photoconduction in thin films of a ladder-type poly-para-phenylene [J].
Barth, S ;
Bassler, H ;
Scherf, U ;
Mullen, K .
CHEMICAL PHYSICS LETTERS, 1998, 288 (01) :147-154
[3]  
CHRIST N, UNPUB
[4]   Nanosecond response of organic solar cells and photodiodes: Role of trap states [J].
Christ, Nico ;
Kettlitz, Siegfried W. ;
Zuefle, Simon ;
Valouch, Sebastian ;
Lemmer, Uli .
PHYSICAL REVIEW B, 2011, 83 (19)
[5]   Nanosecond response of organic solar cells and photodetectors [J].
Christ, Nico S. ;
Kettlitz, Siegfried W. ;
Valouch, Sebastian ;
Zuefle, Simon ;
Gaertner, Christian ;
Punke, Martin ;
Lemmer, Uli .
JOURNAL OF APPLIED PHYSICS, 2009, 105 (10)
[6]  
Clarke T. M., 2009, J PHYS CHEM C
[7]   Polaron recombination in pristine and annealed bulk heterojunction solar cells [J].
Deibel, C. ;
Baumann, A. ;
Wagenpfahl, A. ;
Dyakonov, V. .
SYNTHETIC METALS, 2009, 159 (21-22) :2345-2347
[8]   ELECTRIC-FIELD-INDUCED PHOTOLUMINESCENCE QUENCHING IN THIN-FILM LIGHT-EMITTING-DIODES BASED ON POLY(PHENYL-P-PHENYLENE VINYLENE) [J].
DEUSSEN, M ;
SCHEIDLER, M ;
BASSLER, H .
SYNTHETIC METALS, 1995, 73 (02) :123-129
[9]   Effect of Morphology on Ultrafast Free Carrier Generation in Polythiophene:Fullerene Organic Solar Cells [J].
Howard, Ian A. ;
Mauer, Ralf ;
Meister, Michael ;
Laquai, Frederic .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2010, 132 (42) :14866-14876
[10]   Modeling photocurrent transients in organic solar cells [J].
Hwang, I. ;
Greenham, N. C. .
NANOTECHNOLOGY, 2008, 19 (42)