Magnetic field effects on photoluminescence in PPP. Investigation of the influence of chain length and degree of order

Autor:	G. Zoriniants, S. Blumstengel, M. M. Triebel, A.N. Chaban, Eugene Frankevich, V. M. Kobryanskii
Rok vydání:	1996
Předmět:	Photoexcitation Condensed Matter::Materials Science Paramagnetism Crystallinity Photoluminescence Materials science Condensed matter physics General Physics and Astronomy Quantum yield Charge carrier Physical and Theoretical Chemistry Nitrogen-vacancy center Magnetic field
Zdroj:	Chemical Physics Letters. 261:545-550
ISSN:	0009-2614
Popis:	The effect of weak static magnetic fields on the photoluminescence quantum yield in poly(para-phenylene) films, which differ in chain length and degree of crystallinity, were investigated in the temperature range between 100 and 300 K. Applying a magnetic field enhances the photoluminescence quantum yield, the relative photoluminescence increase being about a factor 10−4. On the basis of the magnetic field sensitivity, it is proposed that the emission of photoluminescence is partially due to geminate recombination of charge carriers. The formation of intermediate charge transfer states after photoexcitation is responsible for the appearance of the magnetic field effect. Properties of these states are investigated in terms of magnetic field effects, and the influence of the structure of the polymer films is discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a43303070bdc43acb6334583a04ceba0 https://doi.org/10.1016/0009-2614(96)01013-5 Zobrazit plný text záznamu Full Text from ScienceDirect