Photoenhanced current in thin organic layers

Godlewski, J.; Jarosz, G.; Signerski, R.

doi:10.1016/s0169-4332(01)00085-x

Cited by 14 publications

(7 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the literature the term photoenhanced current is introduced for this effect. 40 Because the total spin of the triplet-doublet pair (T-D pair) after the reaction is 1/2, the total spin of the two particles before the reaction is required to also be 1/2 due to spin conservation. Because the triplet is a spin-1 particle and the trapped charge carrier a spin-1/2 particle, the total spin of the pair can be either 3/2 (quartet |Q ) or 1/2 (doublet |D ).…”

Section: A Basic Conceptsmentioning

confidence: 99%

Microscopic modeling of magnetic-field effects on charge transport in organic semiconductors

et al. 2011

View full text Add to dashboard Cite

The stochastic Liouville equation is applied to the field of organic magnetoresistance to perform detailed microscopic calculations on the different proposed models. By adapting this equation, the influence of a magnetic field on the current in bipolaron, electron-hole pair, and triplet models is calculated. The simplicity and wide applicability of the stochastic Liouville equation makes it a powerful tool for interpreting experimental results on magnetoresistance measurements in organic semiconductors. New insights are gained on the influence of hopping rates and disorder on the magnetoresistance.

show abstract

Section: A Basic Conceptsmentioning

confidence: 99%

Microscopic modeling of magnetic-field effects on charge transport in organic semiconductors

et al. 2011

View full text Add to dashboard Cite

show abstract

“…However, in the reaction the triplet exciton is lost, so it cannot contribute to the current anymore via dissociation, which would result in a positive MC. The operating conditions determine which effect is strongest 99. In addition to the hyperfine fields, the zero‐field splitting parameters of the triplet exciton also play a role.…”

Section: Models For Organic Magnetoresistancementioning

confidence: 99%

Spin transport and magnetoresistance in organic semiconductors

Wagemans

Koopmans

2010

Physica Status Solidi (b)

View full text Add to dashboard Cite

Organic semiconductors are interesting materials for spintronics applications because of their long spin lifetimes. In addition, organic spintronics offers the possibility to add magnetic functionality to existing organic electronics. Two main topics of organic spintronics are discussed.First, in organic spin valves, spin transport occurs through an organic spacer layer. As a main source of loss of spin polarization the interactions of the spins with random hyperfine fields originating from surrounding hydrogen nuclei has been identified. Recent progress in the development of organic spin valves and related approaches are discussed, addressing conductivity mismatch and the question whether the observed magnetoresistance is from spin injection or direct tunneling.Second, an intrinsic magnetoresistance is observed in many organic semiconductors. This, so‐called, organic magnetoresistance (OMAR) is interesting because it shows large effects at room temperature, making it interesting for applications, and poses fundamental questions about spin transport and spin interactions in these organic materials.An overview of the main characteristics of OMAR is given and the three main models are discussed. These models are the bipolaron model, the electron–hole pair model and the exciton–charge interaction model. Finally, a comparison is made between the proposed models and experimental results, where it is concluded that the exact origin of OMAR is still open for debate.

show abstract

“…(15)) follows the one-dimensional model. Onsager model has been observed for electrode injection of charge carrier into different organic materials such as: anthracene [1,3,37,49,50], tetracene [1,3,38,54,55], pentacene [57], poly[2-(2V-ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene] (MEH-PPV) [85], 1,2-diazoamino diphenyl ethane (DDE) [86], 8-hydroxyquinoline aluminium complex (Alq 3 ), aromatic diamide (TPD), quinacridone (QAC) and perylene bisimide pigment (PBP) [65], polysilanes like poly[methyl(phenyl)silylene] [87] and many others [96 -102]. Experimental values of Schottky coefficient differ from the theoretically predicted one.…”

Section: One-dimensional Onsager Modelmentioning

confidence: 99%

“…Antibatic behavior of the photocurrent has been observed in many materials such as: antracene [13,59], tetracene and pentacene [57], poly( p-phenylenevinylene) (PPV) [100] and MEH-PPV [101].…”

Section: Photocurrent Limited By Near-electrode Excitonic Processesmentioning

confidence: 99%

See 1 more Smart Citation

Currents and photocurrents in organic materials determined by the interface phenomena

Godlewski

2005

Advances in Colloid and Interface Science

View full text Add to dashboard Cite

Photoenhanced current in thin organic layers

Cited by 14 publications

References 17 publications

Microscopic modeling of magnetic-field effects on charge transport in organic semiconductors

Microscopic modeling of magnetic-field effects on charge transport in organic semiconductors

Spin transport and magnetoresistance in organic semiconductors

Currents and photocurrents in organic materials determined by the interface phenomena

Contact Info

Product

Resources

About