Number of the records: 1
Exciton Quasiparticles: Theory, Dynamics and Applications
- 1.
SYSNO ASEP 0374977 Document Type M - Monograph Chapter R&D Document Type Monograph Chapter Title Exciton diffusion length in titanyl phthalocyanine thin films as determined by the surface photovoltage method Author(s) Toušek, J. (CZ)
Toušková, J. (CZ)
Drabik, M. (CZ)
Remeš, Zdeněk (FZU-D) RID, ORCID
Hanuš, J. (CZ)
Cimrová, Věra (UMCH-V) RID, ORCID
Slavinská, D. (CZ)
Biederman, H. (CZ)
Zachary, A. (US)
Hanley, L. (US)Source Title Exciton Quasiparticles: Theory, Dynamics and Applications. - New York : Nova Science Publishers, Inc, 2011 / Bergin R.M. - ISBN 978-1-61122-318-7 Pages s. 275-290 Number of pages 16 s. Number of pages 411 Language eng - English Country US - United States Keywords exciton ; surface photovoltage ; thin film ; phthalocyanine ; optical spectroscopy Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects 1M06031 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z10100521 - FZU-D (2005-2011) AV0Z40500505 - UMCH-V (2005-2011) Annotation Exciton diffusion length was measured by the generalized surface photovoltage (SPV) method. Theoretical calculations of the photocurrents from the SCR and from the bulk of the layers were carried out and illustrated to show how the different parameters influence the form and relative size of the photogenerated signal. We studied titanyl phthalocyanine (TiOPc) thin films prepared using evaporation and surface polymerization by ion-assisted deposition (SPIAD). Bilayer (TiO2/TiOPc) thin films were also prepared, where the TiO2 layer was sputtered from TiO2 target. All films were characterized by the surface photovoltage method using absorption coefficients evaluated from measurement of the optical transmission and reflection. We found that the drift lengths of the charge carriers were shorter than the SCR thickness, which means recombination in this depletion region. Typically, the thickness of the SCR was higher than that of the bulk and the diffusion length of excitons was ~15 nm. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2012
Number of the records: 1