scholarly journals Temperature dependence of the charge carrier mobility in gated quasi-one-dimensional systems

2003 ◽  
Vol 67 (16) ◽  
Author(s):  
Lazaros K. Gallos ◽  
Bijan Movaghar ◽  
Laurens D. A. Siebbeles
Keyword(s):  
Charge Carrier ◽  
Temperature Dependence ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
One Dimensional

Ultrafast Photoconductivity in Organic Semiconductors

2006 ◽  
Vol 935 ◽  
Author(s):  
Oksana Ostroverkhova ◽  
David G. Cooke ◽  
Frank A. Hegmann ◽  
John E. Anthony ◽  
Vitaly Podzorov ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Organic Semiconductors ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Brick Wall ◽  
One Dimensional ◽  
Organic Molecular Crystals ◽  
Charge Carrier Dynamics ◽  
Transient Photoconductivity ◽  
Comprehensive Study

ABSTRACTWe present comprehensive study of ultrafast charge carrier dynamics in a variety of organic molecular crystals. In all samples, we observed sub-picosecond charge photogeneration and band-like transport, characterized by (i) an increase in charge carrier mobility as the temperature decreases in a wide temperature range of at least 20 K – 300 K and (ii) mobility anisotropy in the a-b plane of the crystals. The temperature dependence of the decay dynamics of the transient photoconductivity reveals the presence of shallow trapping sites in herring-bone-type-structured crystals (such as pentacene (Pc), tetracene (Tc), and rubrene (Rub)), while such traps are apparently absent in “brick-wall”-type crystals (such as functionalized pentacene (FPc)). We also report on the measurements of the charge carrier mobility anisotropy in the a-b plane of two types of FPc single crystals. Anisotropies of approximately 3.5 and 11.6 were obtained in the crystals characterized by crystal structures favoring two-dimensional and one-dimensional charge transport, respectively, consistent with the degree of π-overlap along different directions in the crystals.

Charge carrier mobility in one-dimensional aligned π-stacks of conjugated small molecules with a benzothiadiazole central unit

2017 ◽  
Vol 19 (12) ◽  
pp. 8330-8339 ◽  
Author(s):  
Deyan Raychev ◽  
Olga Guskova
Keyword(s):  
Charge Carrier ◽  
Small Molecules ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Charge Carriers ◽  
Central Unit ◽  
Dft Methods ◽  
Crystalline Materials ◽  
One Dimensional ◽  
Mobility Of Charge Carriers

The hopping mobility of charge carriers in organic crystalline materials consisting of benzothiadiazole-cored molecules with thiophene or furan flanks was analyzed using DFT methods.

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