Projects / Programmes
Organski monokristali za aplikacije z visoko gibljivostjo (Slovene)
| Code |
Science |
Field |
Subfield |
| 1.02.00 |
Natural sciences and mathematics |
Physics |
|
| Code |
Science |
Field |
| 1.03 |
Natural Sciences |
Physical sciences |
Researchers (7)
Organisations (1)
| no. |
Code |
Research organisation |
City |
Registration number |
No. of publicationsNo. of publications |
| 1. |
1540 |
University of Nova Gorica |
Nova Gorica |
5920884000 |
0 |
Significance for science
The main goal of the project was to improve the mobility in organic semiconductors for a factor of 10, which was achieved. Research in the field of novel methods of growth of organic semiconductor C8-BTBT, coupled to innovative methods of characterization of charge carrier transport we have obtained charge carrier mobility of 24 cm$^{2}$/Vs, which is more than tenfold increase in values, which were standard four years ago. This project has demonstrated the conditions of thin film fabrication and the molecules to be used to achieve ordered crystal growth and consequently high charge carrier mobility. We were the first to demonstrate the use of transient photocurrent measurements on coplanar-electrode structures on these materials. This enabled us to characterize charge carrier transport in the realm of low charge carrier concentrations, and demonstrate positive temperature dependence and negative filed dependence of the mobility. By using effective medium approximation we showed the role of structural disorder on long-range fluctuations of mobility band edge. These results will have important implications on future developments of single-crystal organic electronics.
Significance for the country
Organic electronics in Slovenia is relatively poorly developed, since only LFOS deals with this field, and some individual activities are present at the Jožef Stefan Institute, although in the world, especially in the countries of Western Europe, USA, Japan and Korea, research institutes and corporations invest considerable resources in the research of organic electronic components, solar cells, sensors. This project signifies a significant enrichment of Slovenian knowledge in the field of organic semiconductor monocrystals, which was so far very poorly known in Slovenia. We have gained valuable experience in the characterization of these materials with the high mobility of charge carriers, thus enabling the education of young people who will also be able to see a business opportunity in this regard, as startup companies in the world are very common in the field of organic electronics.
Most important scientific results
Annual report
2014,
2015,
final report
Most important socioeconomically and culturally relevant results
Annual report
2015,
final report
