TY  - JOUR
AU  - Jovanović, Djordje
AU  - Petrović, Miloš
AU  - Tomašević-Ilić, Tijana
AU  - Matković, Aleksandar
AU  - Bokalič, Matevž
AU  - Spasenović, Marko
AU  - Rogdakis, Konstantinos
AU  - Kymakis, Emmannuel
AU  - Knežević, Dragan
AU  - Cina, Lucio
AU  - Gajić, Radoš
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6491
AB  - A long operational lifetime is required for the use of solar cells in real-life photovoltaic applications. The optimization of operational lifetimes is achieved through understanding the inherent degradation phenomena in solar cells. In this study, graphene/Si Schottky-junction solar cells were produced, utilizing liquid-phase-exfoliated graphene as an active surface. The operational and interface stability of these solar cells over a period of 5 years in ambient conditions (following ISOS-D protocols: dark storage/shelf life) was examined, and the origin of their degradation was reported. It was found that the dominant degradation mechanism could be attributed to the degradation of silver contacts. This was indicated by a decrease in shunt resistance, an increase in the ideality factor (due to a higher carrier recombination), and a constant defect density in graphene films for up to 4 years. Measurements across the solar cell's active area during the 5-year period revealed neither significant spatial inhomogeneity, nor shunt channel defects.
PB  - Elsevier
T2  - Solar Energy Materials and Solar Cells
T1  - Long-term stability of graphene/c-Si Schottky-junction solar cells
VL  - 258
SP  - 112414
DO  - 10.1016/j.solmat.2023.112414
ER  - 

@article{
author = "Jovanović, Djordje and Petrović, Miloš and Tomašević-Ilić, Tijana and Matković, Aleksandar and Bokalič, Matevž and Spasenović, Marko and Rogdakis, Konstantinos and Kymakis, Emmannuel and Knežević, Dragan and Cina, Lucio and Gajić, Radoš",
year = "2023",
abstract = "A long operational lifetime is required for the use of solar cells in real-life photovoltaic applications. The optimization of operational lifetimes is achieved through understanding the inherent degradation phenomena in solar cells. In this study, graphene/Si Schottky-junction solar cells were produced, utilizing liquid-phase-exfoliated graphene as an active surface. The operational and interface stability of these solar cells over a period of 5 years in ambient conditions (following ISOS-D protocols: dark storage/shelf life) was examined, and the origin of their degradation was reported. It was found that the dominant degradation mechanism could be attributed to the degradation of silver contacts. This was indicated by a decrease in shunt resistance, an increase in the ideality factor (due to a higher carrier recombination), and a constant defect density in graphene films for up to 4 years. Measurements across the solar cell's active area during the 5-year period revealed neither significant spatial inhomogeneity, nor shunt channel defects.",
publisher = "Elsevier",
journal = "Solar Energy Materials and Solar Cells",
title = "Long-term stability of graphene/c-Si Schottky-junction solar cells",
volume = "258",
pages = "112414",
doi = "10.1016/j.solmat.2023.112414"
}

Jovanović, D., Petrović, M., Tomašević-Ilić, T., Matković, A., Bokalič, M., Spasenović, M., Rogdakis, K., Kymakis, E., Knežević, D., Cina, L.,& Gajić, R.. (2023). Long-term stability of graphene/c-Si Schottky-junction solar cells. in Solar Energy Materials and Solar Cells
Elsevier., 258, 112414.
https://doi.org/10.1016/j.solmat.2023.112414

Jovanović D, Petrović M, Tomašević-Ilić T, Matković A, Bokalič M, Spasenović M, Rogdakis K, Kymakis E, Knežević D, Cina L, Gajić R. Long-term stability of graphene/c-Si Schottky-junction solar cells. in Solar Energy Materials and Solar Cells. 2023;258:112414.
doi:10.1016/j.solmat.2023.112414 .

Jovanović, Djordje, Petrović, Miloš, Tomašević-Ilić, Tijana, Matković, Aleksandar, Bokalič, Matevž, Spasenović, Marko, Rogdakis, Konstantinos, Kymakis, Emmannuel, Knežević, Dragan, Cina, Lucio, Gajić, Radoš, "Long-term stability of graphene/c-Si Schottky-junction solar cells" in Solar Energy Materials and Solar Cells, 258 (2023):112414,
https://doi.org/10.1016/j.solmat.2023.112414 . .

TY  - JOUR
AU  - Jovanović, Djordje
AU  - Petrović, Miloš
AU  - Tomašević-Ilić, Tijana
AU  - Matković, Aleksandar
AU  - Bokalič, Matevž
AU  - Spasenović, Marko
AU  - Rogdakis, Konstantinos
AU  - Kymakis, Emmannuel
AU  - Knežević, Dragan
AU  - Cina, Lucio
AU  - Gajić, Radoš
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6490
AB  - A long operational lifetime is required for the use of solar cells in real-life photovoltaic applications. The optimization of operational lifetimes is achieved through understanding the inherent degradation phenomena in solar cells. In this study, graphene/Si Schottky-junction solar cells were produced, utilizing liquid-phase-exfoliated graphene as an active surface. The operational and interface stability of these solar cells over a period of 5 years in ambient conditions (following ISOS-D protocols: dark storage/shelf life) was examined, and the origin of their degradation was reported. It was found that the dominant degradation mechanism could be attributed to the degradation of silver contacts. This was indicated by a decrease in shunt resistance, an increase in the ideality factor (due to a higher carrier recombination), and a constant defect density in graphene films for up to 4 years. Measurements across the solar cell's active area during the 5-year period revealed neither significant spatial inhomogeneity, nor shunt channel defects.
PB  - Elsevier
T2  - Solar Energy Materials and Solar Cells
T1  - Long-term stability of graphene/c-Si Schottky-junction solar cells
VL  - 258
SP  - 112414
DO  - 10.1016/j.solmat.2023.112414
ER  - 

@article{
author = "Jovanović, Djordje and Petrović, Miloš and Tomašević-Ilić, Tijana and Matković, Aleksandar and Bokalič, Matevž and Spasenović, Marko and Rogdakis, Konstantinos and Kymakis, Emmannuel and Knežević, Dragan and Cina, Lucio and Gajić, Radoš",
year = "2023",
abstract = "A long operational lifetime is required for the use of solar cells in real-life photovoltaic applications. The optimization of operational lifetimes is achieved through understanding the inherent degradation phenomena in solar cells. In this study, graphene/Si Schottky-junction solar cells were produced, utilizing liquid-phase-exfoliated graphene as an active surface. The operational and interface stability of these solar cells over a period of 5 years in ambient conditions (following ISOS-D protocols: dark storage/shelf life) was examined, and the origin of their degradation was reported. It was found that the dominant degradation mechanism could be attributed to the degradation of silver contacts. This was indicated by a decrease in shunt resistance, an increase in the ideality factor (due to a higher carrier recombination), and a constant defect density in graphene films for up to 4 years. Measurements across the solar cell's active area during the 5-year period revealed neither significant spatial inhomogeneity, nor shunt channel defects.",
publisher = "Elsevier",
journal = "Solar Energy Materials and Solar Cells",
title = "Long-term stability of graphene/c-Si Schottky-junction solar cells",
volume = "258",
pages = "112414",
doi = "10.1016/j.solmat.2023.112414"
}

Jovanović, D., Petrović, M., Tomašević-Ilić, T., Matković, A., Bokalič, M., Spasenović, M., Rogdakis, K., Kymakis, E., Knežević, D., Cina, L.,& Gajić, R.. (2023). Long-term stability of graphene/c-Si Schottky-junction solar cells. in Solar Energy Materials and Solar Cells
Elsevier., 258, 112414.
https://doi.org/10.1016/j.solmat.2023.112414

Jovanović D, Petrović M, Tomašević-Ilić T, Matković A, Bokalič M, Spasenović M, Rogdakis K, Kymakis E, Knežević D, Cina L, Gajić R. Long-term stability of graphene/c-Si Schottky-junction solar cells. in Solar Energy Materials and Solar Cells. 2023;258:112414.
doi:10.1016/j.solmat.2023.112414 .

Jovanović, Djordje, Petrović, Miloš, Tomašević-Ilić, Tijana, Matković, Aleksandar, Bokalič, Matevž, Spasenović, Marko, Rogdakis, Konstantinos, Kymakis, Emmannuel, Knežević, Dragan, Cina, Lucio, Gajić, Radoš, "Long-term stability of graphene/c-Si Schottky-junction solar cells" in Solar Energy Materials and Solar Cells, 258 (2023):112414,
https://doi.org/10.1016/j.solmat.2023.112414 . .

TY  - JOUR
AU  - Knežević, Dragan
AU  - Radojković, Bojana
AU  - Ristić, Slavica
AU  - Polić, Suzana R.
AU  - Janićijević, Milovan
AU  - Tomić, Ljubiša
AU  - Jegdić, Bore
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3978
AB  - Temperature  distribution  induced  by  laser  radiation  is  a  very  important 
parameter for an efficient and safe application of lasers in different ceramic 
processing  techniques.  This  paper  presents  the  results  of  an  infrared 
thermography (IRT) application for monitoring temperature distribution on 
a ceramic surface during Nd: YAG laser irradiation with different fluences 
and 8ns pulse duration. FLIR, E40 and SC7200 IR cameras were used with 
the  aim  of  recording  the  maximum  temperature  in  the  irradiated  zones.  It 
was  expected  that  IRT  could  give  some  information  related  to  the  heat 
affected zone and possible damage to the base material; however, the results 
have  shown  that  IR  cameras,  even  those  with  high  performance  such  as 
SC7200,  cannot  record  the  maximum  temperature  value  at  the  moment  of 
laser  operation,  but  only  the  average  temperature  of  the  bulk  sample 
material  after  laser  pulses.  The  results  of  the  numerical  simulation  have 
confirmed the value of the thermographic measurements. The microstructure 
and  micromorphology  of  the  ceramic  surface  before  and  after  the  laser 
treatment  were  analysed  by  optical  and  scanning  electron  microscopy  as 
well  as  by  examining  the  roughness  of  the  irradiated  and  non-  irradiated 
surfaces,  while  the  micromechanical  changes  were  analysed  by  comparing 
the micro-hardness of the irradiated and non-exposed surfaces.
PB  - Vinča Institute of Nuclear Sciences, Belgrade
T2  - Thermal Science
T1  - Monitoring of a ceramic surface temperature field induced by pulsed Nd: YAG laser
VL  - 25
IS  - 1B
SP  - 567
EP  - 578
DO  - 10.2298/TSCI190811425K
ER  - 

@article{
author = "Knežević, Dragan and Radojković, Bojana and Ristić, Slavica and Polić, Suzana R. and Janićijević, Milovan and Tomić, Ljubiša and Jegdić, Bore",
year = "2021",
abstract = "Temperature  distribution  induced  by  laser  radiation  is  a  very  important 
parameter for an efficient and safe application of lasers in different ceramic 
processing  techniques.  This  paper  presents  the  results  of  an  infrared 
thermography (IRT) application for monitoring temperature distribution on 
a ceramic surface during Nd: YAG laser irradiation with different fluences 
and 8ns pulse duration. FLIR, E40 and SC7200 IR cameras were used with 
the  aim  of  recording  the  maximum  temperature  in  the  irradiated  zones.  It 
was  expected  that  IRT  could  give  some  information  related  to  the  heat 
affected zone and possible damage to the base material; however, the results 
have  shown  that  IR  cameras,  even  those  with  high  performance  such  as 
SC7200,  cannot  record  the  maximum  temperature  value  at  the  moment  of 
laser  operation,  but  only  the  average  temperature  of  the  bulk  sample 
material  after  laser  pulses.  The  results  of  the  numerical  simulation  have 
confirmed the value of the thermographic measurements. The microstructure 
and  micromorphology  of  the  ceramic  surface  before  and  after  the  laser 
treatment  were  analysed  by  optical  and  scanning  electron  microscopy  as 
well  as  by  examining  the  roughness  of  the  irradiated  and  non-  irradiated 
surfaces,  while  the  micromechanical  changes  were  analysed  by  comparing 
the micro-hardness of the irradiated and non-exposed surfaces.",
publisher = "Vinča Institute of Nuclear Sciences, Belgrade",
journal = "Thermal Science",
title = "Monitoring of a ceramic surface temperature field induced by pulsed Nd: YAG laser",
volume = "25",
number = "1B",
pages = "567-578",
doi = "10.2298/TSCI190811425K"
}

Knežević, D., Radojković, B., Ristić, S., Polić, S. R., Janićijević, M., Tomić, L.,& Jegdić, B.. (2021). Monitoring of a ceramic surface temperature field induced by pulsed Nd: YAG laser. in Thermal Science
Vinča Institute of Nuclear Sciences, Belgrade., 25(1B), 567-578.
https://doi.org/10.2298/TSCI190811425K

Knežević D, Radojković B, Ristić S, Polić SR, Janićijević M, Tomić L, Jegdić B. Monitoring of a ceramic surface temperature field induced by pulsed Nd: YAG laser. in Thermal Science. 2021;25(1B):567-578.
doi:10.2298/TSCI190811425K .

Knežević, Dragan, Radojković, Bojana, Ristić, Slavica, Polić, Suzana R., Janićijević, Milovan, Tomić, Ljubiša, Jegdić, Bore, "Monitoring of a ceramic surface temperature field induced by pulsed Nd: YAG laser" in Thermal Science, 25, no. 1B (2021):567-578,
https://doi.org/10.2298/TSCI190811425K . .

TY  - CONF
AU  - Knežević, Dragan
AU  - Ristić, Slavica
AU  - Polić, Suzana R.
AU  - Radojković, Bojana
AU  - Tomić, Ljubiša
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4076
AB  - This  paper  presents  the  results  of  an  infrared  thermography  (IRT)  application  for  monitoring  temperature 
distribution on a ceramic surface during Nd: YAG laser irradiation. The laser operated in the Q-switch mode with λ= 
1064 nm. The duration of a pulse was τ = 8 ns. The repetition rate was f  l = 1-20 Hz. FLIR, E40 and SC7200 IR cameras 
were used. Recording  of the  maximum  temperature  in  the  irradiated  zones is very important  information  related  
to  the damage threshold of materials.  The tested sample is a piece of a ceramic tile. A large number of factors affect 
determination of the maximum temperature in the very fast processes as it is irradiation with laser pulse duration of 8 
ns.  One of them is the camera integration time. The experimental results have  shown  that  IR  cameras,  even  those  
with  high  performance  such  as SC7200,  cannot  record  the  maximum  temperature  value  at  the  moment  of laser  
operation,  but  only  the  average  temperature  of  the  bulk  sample material  after  laser  pulses.   The microstructure 
and  micromorphology  of  the  ceramic  surface  after  the  laser treatment  were  analyzed  by  optical  and  scanning  
electron  microscopy.
PB  - Belgrade : Military Technical Institute
C3  - Proceedings - 9th International Scientific Conference od Defensive Technologies OTEH 2020, Belgrade, 15-16 october 2020
T1  - Influence of IR camera integration time on the accuracy of Tmax determination during laser interaction with ceramics
VL  - 9
SP  - 417
EP  - 423
UR  - https://hdl.handle.net/21.15107/rcub_cer_4076
ER  - 

@conference{
author = "Knežević, Dragan and Ristić, Slavica and Polić, Suzana R. and Radojković, Bojana and Tomić, Ljubiša",
year = "2020",
abstract = "This  paper  presents  the  results  of  an  infrared  thermography  (IRT)  application  for  monitoring  temperature 
distribution on a ceramic surface during Nd: YAG laser irradiation. The laser operated in the Q-switch mode with λ= 
1064 nm. The duration of a pulse was τ = 8 ns. The repetition rate was f  l = 1-20 Hz. FLIR, E40 and SC7200 IR cameras 
were used. Recording  of the  maximum  temperature  in  the  irradiated  zones is very important  information  related  
to  the damage threshold of materials.  The tested sample is a piece of a ceramic tile. A large number of factors affect 
determination of the maximum temperature in the very fast processes as it is irradiation with laser pulse duration of 8 
ns.  One of them is the camera integration time. The experimental results have  shown  that  IR  cameras,  even  those  
with  high  performance  such  as SC7200,  cannot  record  the  maximum  temperature  value  at  the  moment  of laser  
operation,  but  only  the  average  temperature  of  the  bulk  sample material  after  laser  pulses.   The microstructure 
and  micromorphology  of  the  ceramic  surface  after  the  laser treatment  were  analyzed  by  optical  and  scanning  
electron  microscopy.",
publisher = "Belgrade : Military Technical Institute",
journal = "Proceedings - 9th International Scientific Conference od Defensive Technologies OTEH 2020, Belgrade, 15-16 october 2020",
title = "Influence of IR camera integration time on the accuracy of Tmax determination during laser interaction with ceramics",
volume = "9",
pages = "417-423",
url = "https://hdl.handle.net/21.15107/rcub_cer_4076"
}

Knežević, D., Ristić, S., Polić, S. R., Radojković, B.,& Tomić, L.. (2020). Influence of IR camera integration time on the accuracy of Tmax determination during laser interaction with ceramics. in Proceedings - 9th International Scientific Conference od Defensive Technologies OTEH 2020, Belgrade, 15-16 october 2020
Belgrade : Military Technical Institute., 9, 417-423.
https://hdl.handle.net/21.15107/rcub_cer_4076

Knežević D, Ristić S, Polić SR, Radojković B, Tomić L. Influence of IR camera integration time on the accuracy of Tmax determination during laser interaction with ceramics. in Proceedings - 9th International Scientific Conference od Defensive Technologies OTEH 2020, Belgrade, 15-16 october 2020. 2020;9:417-423.
https://hdl.handle.net/21.15107/rcub_cer_4076 .

Knežević, Dragan, Ristić, Slavica, Polić, Suzana R., Radojković, Bojana, Tomić, Ljubiša, "Influence of IR camera integration time on the accuracy of Tmax determination during laser interaction with ceramics" in Proceedings - 9th International Scientific Conference od Defensive Technologies OTEH 2020, Belgrade, 15-16 october 2020, 9 (2020):417-423,
https://hdl.handle.net/21.15107/rcub_cer_4076 .

TY  - CONF
AU  - Srećković, Milesa
AU  - Jevtić, Sanja
AU  - Tomić, Željka
AU  - Đokić-Milošević, Biljana
AU  - Slavković, Nikola
AU  - Bugarinović, Aleksandar
AU  - Polić-Radovanović, Suzana R.
AU  - Knežević, Dragan
AU  - Fidanovski, Zoran
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6386
AB  - Prema tipu primene lasera počinje se zadatak sa odabirom pogodnog kvantnog generatora, a zatim sledi koncepcija dizajna izabrane metode. Prema kompleksnosti sistema simuacije u procesu dizajniranja i procene uspešnosti, zamišljene koncepcije imaju veliku ulogu, pošto su cene razvoja sistema često u širokim granicama. U radu se razmatraju izabrani zahtevi i algoritmi, koji ih prate, kao delovi programskih paketa ili pojedinačno razvijenih sopstvenih rešenja. Izabrane su problematike iz dizajna sistema primene lasera kod interferometara, neki lidarski – ekološki problemi, i problematika kontrole požara, koja se ostvaruje primenom lidarskih sistema.
AB  - The task of the laser application start with selection of adequate quantum generator, and the second step is the design of a chosen method. The wide cost range of the system development and simulation complexity in the designing process, result in the overall evaluation of conception efficiency. The chosen demandes and according algorithms as well as software packages, or own software solutions are presented in this paper. Design problems of laser systems in interferometers, some lidar-ecology applications, and the fire detection and monitoring accomplished by lidar systems, are analysed, too.
PB  - Istočno Sarajevo: Elektrotehnički fakultet
C3  - XII međunarodni naučno-stručni simpozijum INFOTEH-JAHORINA 2013
T1  - Simulacione metode u pristupu projektovanju  lasera od interesa u ekologiji
T1  - Simulation methods approach to designing lasers of interest in ecology
VL  - XII
SP  - 478
EP  - 483
UR  - https://hdl.handle.net/21.15107/rcub_cer_6386
ER  - 

@conference{
author = "Srećković, Milesa and Jevtić, Sanja and Tomić, Željka and Đokić-Milošević, Biljana and Slavković, Nikola and Bugarinović, Aleksandar and Polić-Radovanović, Suzana R. and Knežević, Dragan and Fidanovski, Zoran",
year = "2013",
abstract = "Prema tipu primene lasera počinje se zadatak sa odabirom pogodnog kvantnog generatora, a zatim sledi koncepcija dizajna izabrane metode. Prema kompleksnosti sistema simuacije u procesu dizajniranja i procene uspešnosti, zamišljene koncepcije imaju veliku ulogu, pošto su cene razvoja sistema često u širokim granicama. U radu se razmatraju izabrani zahtevi i algoritmi, koji ih prate, kao delovi programskih paketa ili pojedinačno razvijenih sopstvenih rešenja. Izabrane su problematike iz dizajna sistema primene lasera kod interferometara, neki lidarski – ekološki problemi, i problematika kontrole požara, koja se ostvaruje primenom lidarskih sistema., The task of the laser application start with selection of adequate quantum generator, and the second step is the design of a chosen method. The wide cost range of the system development and simulation complexity in the designing process, result in the overall evaluation of conception efficiency. The chosen demandes and according algorithms as well as software packages, or own software solutions are presented in this paper. Design problems of laser systems in interferometers, some lidar-ecology applications, and the fire detection and monitoring accomplished by lidar systems, are analysed, too.",
publisher = "Istočno Sarajevo: Elektrotehnički fakultet",
journal = "XII međunarodni naučno-stručni simpozijum INFOTEH-JAHORINA 2013",
title = "Simulacione metode u pristupu projektovanju  lasera od interesa u ekologiji, Simulation methods approach to designing lasers of interest in ecology",
volume = "XII",
pages = "478-483",
url = "https://hdl.handle.net/21.15107/rcub_cer_6386"
}

Srećković, M., Jevtić, S., Tomić, Ž., Đokić-Milošević, B., Slavković, N., Bugarinović, A., Polić-Radovanović, S. R., Knežević, D.,& Fidanovski, Z.. (2013). Simulacione metode u pristupu projektovanju  lasera od interesa u ekologiji. in XII međunarodni naučno-stručni simpozijum INFOTEH-JAHORINA 2013
Istočno Sarajevo: Elektrotehnički fakultet., XII, 478-483.
https://hdl.handle.net/21.15107/rcub_cer_6386

Srećković M, Jevtić S, Tomić Ž, Đokić-Milošević B, Slavković N, Bugarinović A, Polić-Radovanović SR, Knežević D, Fidanovski Z. Simulacione metode u pristupu projektovanju  lasera od interesa u ekologiji. in XII međunarodni naučno-stručni simpozijum INFOTEH-JAHORINA 2013. 2013;XII:478-483.
https://hdl.handle.net/21.15107/rcub_cer_6386 .

Srećković, Milesa, Jevtić, Sanja, Tomić, Željka, Đokić-Milošević, Biljana, Slavković, Nikola, Bugarinović, Aleksandar, Polić-Radovanović, Suzana R., Knežević, Dragan, Fidanovski, Zoran, "Simulacione metode u pristupu projektovanju  lasera od interesa u ekologiji" in XII međunarodni naučno-stručni simpozijum INFOTEH-JAHORINA 2013, XII (2013):478-483,
https://hdl.handle.net/21.15107/rcub_cer_6386 .