Experimental and theoretical study of photo- and electroluminescence of divinyldiphenyl and divinylphenanthrene derivatives.
Electronic absorption and luminescence spectra of four new compounds of divinyldiphenyl and divinylphenanthrene derivatives are investigated experimentally in tetrahydrofuran solutions and thin films obtained by thermal vacuum deposition and by spin coating of these substances embedded into polyvinylcarbazole matrix. Molecular geometry optimizations and electronic spectra have been calculated in the framework of XMC-QDPT2/6-31G (d, p) and TDDFT/B3LYP/6-31G (d, p) levels of theory. We have fabricated and studied OLED devices with the structure ITO/PEDOT:PSS/NPD/L/Ca/Al and ITO/PEDOT:PSS/PVK+L/Ca, where L is the luminophore. It is demonstrated that the photo-and electroluminescence spectra of divinyldiphenyl are not identical and undergo strong changes depending on the method of sample preparation.
Tomsk State University, Laboratory of Organic Electronics, Tomsk, Novosobornaya Sq.1, Russia.
L G
LG
Samsonova
Tomsk State University, Laboratory of Organic Electronics, Tomsk, Novosobornaya Sq.1, Russia; Tomsk Polytechnic University, Tomsk 634050, 43a Lenin Avenue, Russia. Electronic address: valievrashid@mail.ru.
R R
RR
Valiev
Tomsk State University, Laboratory of Organic Electronics, Tomsk, Novosobornaya Sq.1, Russia.
K M
KM
Degtyarenko
Tomsk State University, Laboratory of Organic Electronics, Tomsk, Novosobornaya Sq.1, Russia.
D A
DA
Sunchugashev
Institute of New Materials Chemistry, National Academy of Sciences of Belarus, F.Skaryna Str. 36, 220141 Minsk, Belarus.
I N
IN
Kukhta
Tomsk State University, Laboratory of Organic Electronics, Tomsk, Novosobornaya Sq.1, Russia; Institute for Nuclear Problems, Belarusian State University, Babruiskaya Str.11, 220030 Minsk, Belarus.
A V
AV
Kukhta
Tomsk State University, Laboratory of Organic Electronics, Tomsk, Novosobornaya Sq.1, Russia.
T N
TN
Kopylova
Ab initio methods; Electroluminescence; Excimers; Exciplexes; New linear molecules; Photoluminescence