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62b370f60a15d T Ceponis

 

Dr. Tomas Čeponis

Phone: +370 522 34 486

E-mail: 

 
Institute / Center

Institute of Photonics and Nanotechnology (IPN)
Research Area

Technological Sciences
Present position

Professor, Senior Researcher
Scientific Interests, Keywords Carrier transport, capture, recombination/generation in crystal and amorphous materials, evolution of radiation defects in semiconductors, materials engineering, development of contact and contactless characterization techniques. Characterization of radiation sensors, development of dosimetry systems for high energy physics experiments and for medical applications.
Links to External Profile

ORCID 0000-0001-5448-6390

https://orcid.org/orcid-search/search?searchQuery=0000-0001-5448-6390
Most important publications

1. E. Gaubas, T. Ceponis, L. Deveikis, D. Meskauskaite, J. Pavlov, V. Rumbauskas, J. Vaitkus, M. Moll, F. Ravotti, Anneal induced transformations of defects in hadron irradiated Si wafers and Schottky diodes, Mat. Sc. Sem. Proc. 75 (2018) 157–165.


2. E. Gaubas, T. Ceponis, J. Mickevicius, J. Pavlov, V. Rumbauskas, M. Velicka, E. Simoen, and M. Zhao, Pulsed photo-ionization spectroscopy in carbon doped MOCVD GaN epi-layers on Si, Semicond. Sci. Technol. 33 (2018) 075015.

3. E. Gaubas, P. Baronas, T. Čeponis, L. Deveikis, D. Dobrovolskas, E. Kuokstis, J. Mickevičius, V. Rumbauskas, M. Bockowski, M. Iwinska, T. Sochacki, Study of spectral and recombination characteristics of HVPE GaN grown on ammono substrates, Mat. Sc. Semicond. Process. 91 (2019) 341–355.

4. E. Gaubas, T. Čeponis, D. Meškauskaite, J. Mickevičius, J. Pavlov, V. Rumbauskas, R. Grigonis, M. Zajac, R. Kucharski, Pulsed photo-ionization spectroscopy of traps in as-grown and neutron irradiated ammonothermally synthesized GaN, Scientific Reports 9 (2019) 1473.

5. E. Gaubas, T. Čeponis, L. Deveikis, D. Dobrovolskas, V. Rumbauskas, M. Viliunas, Room-temperature infrared photoluminescence in GaN doped with various impurities, Optical Materials 94 (2019) 266–271.

6. E. Gaubas, T. Ceponis, L. Deveikis, V. Kalesinskas, G. Kreiza, T. Malinauskas, J. Pavlov, V. Rumbauskas, A. Mychko, V. Ivanov, Study of the electrical characteristics of CdZnTe Schottky diodes, Mat. Sc. Semicond. Process. 105 (2020) 104705.

7. T. Ceponis, L. Deveikis, S. Lastovskii, L. Makarenko, J. Pavlov, K. Pukas, V. Rumbauskas, E. Gaubas, Transient electrical and optical characteristics of electron and proton irradiated SiGe detectors, Sensors 20 (2020) 6884.

8. T. Ceponis, M. Burkanas, A. Cicinas, L. Deveikis, J. Pavlov, V. Rumbauskas, J. Venius, E. Gaubas, Combined techniques for recovery of radiation damaged detectors, Mat. Sc. Sem. Proc. 168 (2023) 107863.

9. T. Ceponis, L. Deveikis, V. Kovalevskij, J. Mickevicius, V. Rumbauskas, E. Gaubas, Contactless spectroscopy of photoactive centres in sapphire and nitride layered structures, Opt. Mat. 154 (2024) 115641.

10. T. Ceponis, L. Deveikis, V. Kovalevskij, V. Rumbauskas, E. Gaubas, Scintillating structures of GaN on sapphire for hadron irradiation dosimetry, Radiat. Meas. 181 (2025) 107372.
Project and/or Grant leadership
  1. Research Council of Lithuania project Lithuania-Belarus S-LB-19-1 “New silicon-germanium alloys for the development of radiation-resistant semiconductor devices”, 15000 EUR/2019-2020 yr.
  2. LMT R&D projects perspective for Lithuania membership at CERN, S-CERN-24-6 „Development of methods for calibration of high temporal and spatial resolution particle sensors“, 300000 EUR/2024-2027 yr.
Invited talks		 T. Čeponis, E. Gaubas, J. Vaitkus, Itin didelių įtėkių poveikių dalelių sensoriams tyrimai, 45th Lithuanian National Physics Conference, Vilnius, 2023 Oct 25-27 (plenary).

Supervision of Doctoral Students and or Postdoc Students

 Supervision of PhD student in the Field of Materials Engineering T 008.
Teaching Courses

- Materials Characterization Methods
- Radiation detectors for CERN experiments

Supervision of Studens Thesis

Supervision to Bachelor and Master student thesis.

Participation in the national/international governing bodies, commissions, committees, boards etc.

 - Board member at the CERN DRD3 – R&D on Semiconductor Detectors collaboration.
- A board member at the Lithuanian Consortium for Particle Physics.
- Member of Physics N 002 doctoral study committee at Vilnius University.

Expertise

 An expert in the Field of Materials Engineering for consulting the Innovation Agency of Lithuania.
Awards - 2014 – The Lithuanian Academy of Sciences Prize for Young Scientists Scientific Work competition.
- 2014 – The VU Rector's Prize for a young scientist.
- 2015 – The Lithuanian Academy of Sciences scholarship for a young scientist.
- 2021 – The National Science Prize in Natural Sciences 2021 of the Lithuanian Academy of Sciences together with colleagues (prof. E. Gaubas, prof. J. Vaitkus) for the cycle of work on “Study of impact of high radiation fluences on matter for development of dosimetry and radiation technologies (2006-2020)”.

 

 

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