TY  - JOUR
AU  - Tomović, Aleksandar
AU  - Jovanović, Vladimir P.
AU  - Djurišić, Ivana
AU  - Cerovski, Viktor
AU  - Nastasijević, Branislav
AU  - Veielović, S. R.
AU  - Radulović, K.
AU  - Žikić, Radomir
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/876
AB  - The photoluminescence (PL) quenching mechanism of UV light and air-exposed amorphous thin films of 4,4'-bis(2,2-diphenylvinyl)-1,1'-biphenyl (DPVBi), a well-known hole-transport material used in organic light-emitting diodes, is studied. Thin films of DPVBi are stable when exposed to UV light in vacuum but tend to degrade if oxygen is present simultaneously. This is evident from the changes in UV-vis absorption spectra of the latter, showing that degradation rate of DPVBi films is linearly proportional to both oxygen concentration and UV light intensity. Mass spectrometry study of such films revealed a number of different oxygen-containing molecules and fragments of DPVBi thus confirming apparent photo-oxidation process. Also, DFT study of molecular DPVBi with and without oxygen was carried out, the IR spectra calculated for the lowest energy molecules found and the results are compared with the experiment. The most sensitive to photo-oxidation is DPVBi photoluminescence, which decays exponentially with respect to the concentration of photo-oxidized DPVBi molecules (impurities). The PL quantum yield of DPVBi thin film drops to a half of its original value for 0.2% of the impurities present, at which point an average distance between DPVBi molecules (the donors) and photo-oxidized DPVBi species (acceptors) is an order of magnitude larger than the separation between two adjacent molecules. This implies a need for a long-range Forster energy transfer, which we rule out based on the lack of a donor-acceptor spectral overlap. The apparent discrepancy can be removed by postulating exciton self-diffusion in DPVBi thin films, for which there is supporting evidence in existing literature.
PB  - Elsevier, Amsterdam
T2  - Journal of Luminescence
T1  - Fast photoluminescence quenching in thin films of 4,4 '-bis(2,2-diphenylvinyl)-1,1 '-biphenyl exposed to air
EP  - 210
SP  - 204
VL  - 167
DO  - 10.1016/j.jlumin.2015.06.036
ER  - 

@article{
author = "Tomović, Aleksandar and Jovanović, Vladimir P. and Djurišić, Ivana and Cerovski, Viktor and Nastasijević, Branislav and Veielović, S. R. and Radulović, K. and Žikić, Radomir",
year = "2015",
abstract = "The photoluminescence (PL) quenching mechanism of UV light and air-exposed amorphous thin films of 4,4'-bis(2,2-diphenylvinyl)-1,1'-biphenyl (DPVBi), a well-known hole-transport material used in organic light-emitting diodes, is studied. Thin films of DPVBi are stable when exposed to UV light in vacuum but tend to degrade if oxygen is present simultaneously. This is evident from the changes in UV-vis absorption spectra of the latter, showing that degradation rate of DPVBi films is linearly proportional to both oxygen concentration and UV light intensity. Mass spectrometry study of such films revealed a number of different oxygen-containing molecules and fragments of DPVBi thus confirming apparent photo-oxidation process. Also, DFT study of molecular DPVBi with and without oxygen was carried out, the IR spectra calculated for the lowest energy molecules found and the results are compared with the experiment. The most sensitive to photo-oxidation is DPVBi photoluminescence, which decays exponentially with respect to the concentration of photo-oxidized DPVBi molecules (impurities). The PL quantum yield of DPVBi thin film drops to a half of its original value for 0.2% of the impurities present, at which point an average distance between DPVBi molecules (the donors) and photo-oxidized DPVBi species (acceptors) is an order of magnitude larger than the separation between two adjacent molecules. This implies a need for a long-range Forster energy transfer, which we rule out based on the lack of a donor-acceptor spectral overlap. The apparent discrepancy can be removed by postulating exciton self-diffusion in DPVBi thin films, for which there is supporting evidence in existing literature.",
publisher = "Elsevier, Amsterdam",
journal = "Journal of Luminescence",
title = "Fast photoluminescence quenching in thin films of 4,4 '-bis(2,2-diphenylvinyl)-1,1 '-biphenyl exposed to air",
pages = "210-204",
volume = "167",
doi = "10.1016/j.jlumin.2015.06.036"
}

Tomović, A., Jovanović, V. P., Djurišić, I., Cerovski, V., Nastasijević, B., Veielović, S. R., Radulović, K.,& Žikić, R.. (2015). Fast photoluminescence quenching in thin films of 4,4 '-bis(2,2-diphenylvinyl)-1,1 '-biphenyl exposed to air. in Journal of Luminescence
Elsevier, Amsterdam., 167, 204-210.
https://doi.org/10.1016/j.jlumin.2015.06.036

Tomović A, Jovanović VP, Djurišić I, Cerovski V, Nastasijević B, Veielović SR, Radulović K, Žikić R. Fast photoluminescence quenching in thin films of 4,4 '-bis(2,2-diphenylvinyl)-1,1 '-biphenyl exposed to air. in Journal of Luminescence. 2015;167:204-210.
doi:10.1016/j.jlumin.2015.06.036 .

Tomović, Aleksandar, Jovanović, Vladimir P., Djurišić, Ivana, Cerovski, Viktor, Nastasijević, Branislav, Veielović, S. R., Radulović, K., Žikić, Radomir, "Fast photoluminescence quenching in thin films of 4,4 '-bis(2,2-diphenylvinyl)-1,1 '-biphenyl exposed to air" in Journal of Luminescence, 167 (2015):204-210,
https://doi.org/10.1016/j.jlumin.2015.06.036 . .

TY  - JOUR
AU  - Nikolic, Pantelija
AU  - Koenig, W.
AU  - Vujatović, Stevan S.
AU  - Blagojević, Vladimir D
AU  - Luković Golić, Danijela
AU  - Savić, Slavica M.
AU  - Radulović, K.
AU  - Urosević, D.
AU  - Nikolić, Maria Vesna
PY  - 2007
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/212
AB  - Single crystal samples of lead telluride doped with cerium were made using the Bridgman method. Far infrared reflectivity spectra in the temperature range from 10 to 300K are presented. The experimental data were numerically analyzed using a fitting procedure based on the plasmon-phonon interaction model and optical parameters were determined. Two additional local modes were observed at about 138 and 337 cm(-1). The origin of these local vibrational impurity modes was discussed.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Far infrared properties of PbTe doped with cerium
EP  - 295
IS  - 1-2
SP  - 292
VL  - 433
DO  - 10.1016/j.jallcom.2006.06.066
ER  - 

@article{
author = "Nikolic, Pantelija and Koenig, W. and Vujatović, Stevan S. and Blagojević, Vladimir D and Luković Golić, Danijela and Savić, Slavica M. and Radulović, K. and Urosević, D. and Nikolić, Maria Vesna",
year = "2007",
abstract = "Single crystal samples of lead telluride doped with cerium were made using the Bridgman method. Far infrared reflectivity spectra in the temperature range from 10 to 300K are presented. The experimental data were numerically analyzed using a fitting procedure based on the plasmon-phonon interaction model and optical parameters were determined. Two additional local modes were observed at about 138 and 337 cm(-1). The origin of these local vibrational impurity modes was discussed.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Far infrared properties of PbTe doped with cerium",
pages = "295-292",
number = "1-2",
volume = "433",
doi = "10.1016/j.jallcom.2006.06.066"
}

Nikolic, P., Koenig, W., Vujatović, S. S., Blagojević, V. D., Luković Golić, D., Savić, S. M., Radulović, K., Urosević, D.,& Nikolić, M. V.. (2007). Far infrared properties of PbTe doped with cerium. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 433(1-2), 292-295.
https://doi.org/10.1016/j.jallcom.2006.06.066

Nikolic P, Koenig W, Vujatović SS, Blagojević VD, Luković Golić D, Savić SM, Radulović K, Urosević D, Nikolić MV. Far infrared properties of PbTe doped with cerium. in Journal of Alloys and Compounds. 2007;433(1-2):292-295.
doi:10.1016/j.jallcom.2006.06.066 .

Nikolic, Pantelija, Koenig, W., Vujatović, Stevan S., Blagojević, Vladimir D, Luković Golić, Danijela, Savić, Slavica M., Radulović, K., Urosević, D., Nikolić, Maria Vesna, "Far infrared properties of PbTe doped with cerium" in Journal of Alloys and Compounds, 433, no. 1-2 (2007):292-295,
https://doi.org/10.1016/j.jallcom.2006.06.066 . .

TY  - JOUR
AU  - Nikolić, Pantelija M.
AU  - Luković Golić, Danijela
AU  - Savić, Slavica M.
AU  - Radović, DV
AU  - Radulović, K
AU  - Vujatović, Stevan S
AU  - Lukic, L
AU  - Djuric, S
AU  - Nikolić, Maria Vesna
AU  - Bojicic, Aleksandar
PY  - 2005
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/127
AB  - Thermal and electron transport properties of single crystal NiO were determined using the photoacoustic technique. NiO single crystals were prepared using the Verneuil method and were easily cleaved parallel to the (100) plane. All samples were of the p type. Atomic force microscopy images of cleaved NiO samples were made enabling a view of steps along the (001) direction and terraces, which were between 20 nm and 100 nm thick.
PB  - E D P Sciences, Les Ulis Cedex A
T2  - Journal De Physique IV
T1  - Photoacoustic determination of thermal and electron transport properties of single crystal NiO
EP  - 442
SP  - 439
VL  - 125
DO  - 10.1051/jp4:20051250103
ER  - 

@article{
author = "Nikolić, Pantelija M. and Luković Golić, Danijela and Savić, Slavica M. and Radović, DV and Radulović, K and Vujatović, Stevan S and Lukic, L and Djuric, S and Nikolić, Maria Vesna and Bojicic, Aleksandar",
year = "2005",
abstract = "Thermal and electron transport properties of single crystal NiO were determined using the photoacoustic technique. NiO single crystals were prepared using the Verneuil method and were easily cleaved parallel to the (100) plane. All samples were of the p type. Atomic force microscopy images of cleaved NiO samples were made enabling a view of steps along the (001) direction and terraces, which were between 20 nm and 100 nm thick.",
publisher = "E D P Sciences, Les Ulis Cedex A",
journal = "Journal De Physique IV",
title = "Photoacoustic determination of thermal and electron transport properties of single crystal NiO",
pages = "442-439",
volume = "125",
doi = "10.1051/jp4:20051250103"
}

Nikolić, P. M., Luković Golić, D., Savić, S. M., Radović, D., Radulović, K., Vujatović, S. S., Lukic, L., Djuric, S., Nikolić, M. V.,& Bojicic, A.. (2005). Photoacoustic determination of thermal and electron transport properties of single crystal NiO. in Journal De Physique IV
E D P Sciences, Les Ulis Cedex A., 125, 439-442.
https://doi.org/10.1051/jp4:20051250103

Nikolić PM, Luković Golić D, Savić SM, Radović D, Radulović K, Vujatović SS, Lukic L, Djuric S, Nikolić MV, Bojicic A. Photoacoustic determination of thermal and electron transport properties of single crystal NiO. in Journal De Physique IV. 2005;125:439-442.
doi:10.1051/jp4:20051250103 .

Nikolić, Pantelija M., Luković Golić, Danijela, Savić, Slavica M., Radović, DV, Radulović, K, Vujatović, Stevan S, Lukic, L, Djuric, S, Nikolić, Maria Vesna, Bojicic, Aleksandar, "Photoacoustic determination of thermal and electron transport properties of single crystal NiO" in Journal De Physique IV, 125 (2005):439-442,
https://doi.org/10.1051/jp4:20051250103 . .

TY  - JOUR
AU  - Nikolić, Pantelija M.
AU  - Durić, S.
AU  - Radulović, K.
AU  - Vasiljević-Radović, Dana
AU  - Nikolić, Maria Vesna
AU  - Ristić, M.M.
PY  - 2002
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/77
AB  - The possibility of characterization of aluminium powders using a horizontal coherer has been considered. Al powders of known dimension were treated with a high frequency electromagnetic field or with a DC electric field, which were increased until a dielectric breakdown occurred. Using a multifunctional card PC-428 Electronic Design and a suitable interface between the coherer and PC, the activation time of the coherer was measured as a function of powder dimension and the distance between the coherer electrodes. It was also shown that the average dimension of powders of unknown size could be determined using the coherer.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Characterisation of dispersive systems using a coherer
EP  - 108
IS  - 1
SP  - 101
VL  - 34
DO  - 10.2298/SOS0201101N
ER  - 

@article{
author = "Nikolić, Pantelija M. and Durić, S. and Radulović, K. and Vasiljević-Radović, Dana and Nikolić, Maria Vesna and Ristić, M.M.",
year = "2002",
abstract = "The possibility of characterization of aluminium powders using a horizontal coherer has been considered. Al powders of known dimension were treated with a high frequency electromagnetic field or with a DC electric field, which were increased until a dielectric breakdown occurred. Using a multifunctional card PC-428 Electronic Design and a suitable interface between the coherer and PC, the activation time of the coherer was measured as a function of powder dimension and the distance between the coherer electrodes. It was also shown that the average dimension of powders of unknown size could be determined using the coherer.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Characterisation of dispersive systems using a coherer",
pages = "108-101",
number = "1",
volume = "34",
doi = "10.2298/SOS0201101N"
}

Nikolić, P. M., Durić, S., Radulović, K., Vasiljević-Radović, D., Nikolić, M. V.,& Ristić, M.M.. (2002). Characterisation of dispersive systems using a coherer. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 34(1), 101-108.
https://doi.org/10.2298/SOS0201101N

Nikolić PM, Durić S, Radulović K, Vasiljević-Radović D, Nikolić MV, Ristić M. Characterisation of dispersive systems using a coherer. in Science of Sintering. 2002;34(1):101-108.
doi:10.2298/SOS0201101N .

Nikolić, Pantelija M., Durić, S., Radulović, K., Vasiljević-Radović, Dana, Nikolić, Maria Vesna, Ristić, M.M., "Characterisation of dispersive systems using a coherer" in Science of Sintering, 34, no. 1 (2002):101-108,
https://doi.org/10.2298/SOS0201101N . .