Imperial College London

ProfessorThomasAnthopoulos

Faculty of Natural SciencesDepartment of Physics

Visiting Professor
 
 
 
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Contact

 

+44 (0)20 7594 6669thomas.anthopoulos Website

 
 
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Assistant

 

Mrs Carolyn Dale +44 (0)20 7594 7579

 
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Location

 

1111Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Hunter:2016:10.1063/1.4955282,
author = {Hunter, S and Mottram, AD and Anthopoulos, TD},
doi = {10.1063/1.4955282},
journal = {Journal of Applied Physics},
title = {Temperature and composition-dependent density of states in organic small-molecule/polymer blend transistors},
url = {http://dx.doi.org/10.1063/1.4955282},
volume = {120},
year = {2016}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - The density of trap states (DOS) in organic p-type transistors based on the small-molecule 2,8-difluoro-5,11-bis(triethylsilylethynyl) anthradithiophene (diF-TES ADT), the polymer poly(triarylamine) and blends thereof are investigated. The DOS in these devices are measured as a function of semiconductor composition and operating temperature. We show that increasing operating temperature causes a broadening of the DOS below 250 K. Characteristic trap depths of ∼15 meV are measured at 100 K, increasing to between 20 and 50 meV at room-temperature, dependent on the semiconductor composition. Semiconductor films with high concentrations of diF-TES ADT exhibit both a greater density of trap states as well as broader DOS distributions when measured at room-temperature. These results shed light on the underlying charge transport mechanisms in organic blend semiconductors and the apparent freezing-out of hole conduction through the polymer and mixed polymer/small molecule phases at temperatures below 225 K.
AU - Hunter,S
AU - Mottram,AD
AU - Anthopoulos,TD
DO - 10.1063/1.4955282
PY - 2016///
SN - 1089-7550
TI - Temperature and composition-dependent density of states in organic small-molecule/polymer blend transistors
T2 - Journal of Applied Physics
UR - http://dx.doi.org/10.1063/1.4955282
UR - http://hdl.handle.net/10044/1/40847
VL - 120
ER -