Organic charge-transfer phase formation in thin films of the BEDT-TTF/TCNQ donor-acceptor system
| dc.creator | Levitan, Vita | |
| dc.creator | Keller, Kerstin | |
| dc.creator | Huth, Michael | |
| dc.date | 2008-12-13 | |
| dc.date | 2009-03-15 | |
| dc.date.accessioned | 2026-07-07T12:52:09Z | |
| dc.date.available | 2026-07-07T12:52:09Z | |
| dc.description | We have performed charge transfer phase formation studies on the donor/acceptor system bis(ethylendithio)tetrathiafulvalene,(BEDT-TTF)/tetracyanoquinodimethane,(TCNQ) by means of physical vapor deposition. We prepared donor/acceptor bilayer structures on glass and Si(100)/SiO_2 substrates held at room temperature and analyzed the layer structures by optical microscopy, X-ray diffraction and focused ion beam cross sectioning before and after annealing. We found clear evidence for the formation of a charge transfer phase during the annealing procedure. For the as-grown samples we could not detect the occurrence of a charge transfer phase. X-ray diffraction indicated that the monoclinic variant of the (BEDT-TTF)-TCNQ was formed. This was further corroborated by single-source evaporation experiments from pre-reacted (BEDT-TTF)-TCNQ obtained from solution growth, and in particular from co-evaporation experiments of (BEDT-TTF)-TCNQ and TCNQ. In the course of these experiments we found that (0,l,l)-oriented BEDT-TTF layers can be prepared on alpha-Al_2O_3 (1,1,-2,0) substrates at about 100 C using (BEDT-TTF)-TCNQ as source material. We speculate that due to its high vapor pressure the TCNQ component serves as a carrier gas for BEDT-TTF vapor phase transport. | |
| dc.description | 14 pages, 8 figures. Added new author, new section about co-evaporation technique, new references, new figures | |
| dc.identifier | https://arxiv.org/abs/0812.2551 | |
| dc.identifier | http://arxiv.org/abs/0812.2551 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/223209 | |
| dc.subject | Materials Science | |
| dc.subject | Soft Condensed Matter | |
| dc.title | Organic charge-transfer phase formation in thin films of the BEDT-TTF/TCNQ donor-acceptor system | |
| dc.type | text |