Electronic Structure Mapping of Branching States in Poly[methyl(phenyl)silane] Upon Exposure to UV Radiation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28140%2F16%3A43875524" target="_blank" >RIV/70883521:28140/16:43875524 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.3938/jkps.68.563" target="_blank" >http://dx.doi.org/10.3938/jkps.68.563</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3938/jkps.68.563" target="_blank" >10.3938/jkps.68.563</a>
Alternative languages
Result language
angličtina
Original language name
Electronic Structure Mapping of Branching States in Poly[methyl(phenyl)silane] Upon Exposure to UV Radiation
Original language description
The origin of white photoluminescence in polysilanes has long been disputed, and this emission is closely connected with information recording in nanotechnologies. We elucidated UV degradation of an archetypal model polymer poly[methyl(phenyl)silane] by using a new method for electronic structure mapping of organic semiconductors, energy-resolved electrochemical impedance spectroscopy (ER-EIS) and photoluminescence spectroscopy. UV exposure at 345 nm resulted in two defect bands above the highest occupied molecular orbital (HOMO) in the energy region from MINUS SIGN 5.5 eV to MINUS SIGN 3.5 eV with respect to the zero vacuum energy level. The respective density of states was 1016 -1017 cm-3eV-1, and the total integrated concentration was 0 -1017 cm-3. The photoluminescence in the long-wavelength region gave wide bands with photon energies from 2.2 eV to 3.2 eV (corresponding to wavelengths from 600 nm to 390 nm). The observed bands were interpreted by assuming the formation of energetically distributed Si branching radiative states, whose distribution in the HOMO- lowest unoccupied molecular orbital (LUMO) gap was observed by using ER-EIS. The quantum efficiency of defect state formation increased from Φ(x)345 nm = 0.0045 to Φ(x)290 nm = 0.053. The obtained results may contribute to the production of effective polysilane nanomasks and to information recording.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
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Continuities
V - Vyzkumna aktivita podporovana z jinych verejnych zdroju
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
ISSN
0374-4884
e-ISSN
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Volume of the periodical
68
Issue of the periodical within the volume
4
Country of publishing house
KR - KOREA, REPUBLIC OF
Number of pages
6
Pages from-to
563-568
UT code for WoS article
000371528200010
EID of the result in the Scopus database
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