• luminescence and electrical properties of composite polymeric materials with dispersed inorganic nanoparticles;
  study of the mechanisms of cluster formation in semiconductor films of the In-Se system, micro- and nanophases interspersed in halide crystals;
  experimental research and mathematical modeling of kinetic effects in A3B6 semiconductors with nonparabolic dispersion law.

Scientific adviser of candidate dissertations:

1. Galyatkin OO “Interaction of ionizing radiation with composites based on polymers and micro- and nanoinclusions” (Lviv, 2017).
2. Bulik L.-I. I. “Luminescent properties of rare-earth elements in fluoride crystals”.

• Physical Fundamentals of Electronics (122- Computer Science)

Статті:

1. Стахіра Й. М. Стрибкова провідність у шаруватих кристалах In₄Se₃ /    Й. М. Стахіра,   В. П. Савчин, Т. М. Демків // Укр. фіз. журн. – 1993. – Т. 38, № 6. – С. 891–893.
2. Демків Л. С. Особливості розподілу локалізованих станів у забороненій зоні кристалу In₄Se₃ / Л. С. Демків, Т. М. Демків, В. П. Савчин, Й. М. Стахіра // Журнал фізичних досліджень. – 1998. – Т. 2, № 4. – С. 536–540.
3. Стахіра Й. М. Частотна залежність провідності в шарі кристалів In₄Se₃ / Й. М. Стахіра, Т. М. Демків, О. Є. Флюнт // Укр. фіз. журн. – 1995. – Т. 40, № 7. – С. 737–739.
4. Demkiv Т. Formation of La-containing microcrystals in KCl and NaCl matrices / T. Demkiv, V. Vistovskyy, P. Savchyn, G. Stryganyuk, A. Voloshinovskii, L. Demkiv // Functional Materials. – 2009. – Vol. 16, № 3. – Р. 225–229.
5. Myagkota S. V. Spectral-kinetic luminescent basic solid state physics characteristics of CsI-Ba single crystals / S. V. Myagkota, A. S. Pushak, G. B. Stryganyuk, T. M. Demkiv, L. S. Demkiv // Phys. Status Solidi B. – 2010. –  Vol. 247, No. 2. – Р. 393–397.
6. Vistovskiі V. V. Luminescence properties of LaBr₃:Ce microcrystals dispersed in NaBr matrix / V. V. Vistovskiі, A. S. Pushak, S. V. Myagkota, T. M. Demkiv, A. S. Voloshinovskiі, P. A. Rodnyі // Optics and Spectroscopy. – 2010. – Vol. 109, No. 3. – Р. 352–357.
7. Пушак А. С. Люминесценция активированных ионами Eu²⁺ микрокристаллов SrX₂ (X = Cl, I), диспергированных в матрице NaI / А. С. Пушак, В. В. Вистовский, Т. М. Демкив [и др.] // Оптика и спектроскопия. – 2014. – Т. 117, № 4. – C. 611–615.
8. Демків Т. Вплив йонізуючого випромінювання на електричні властивості композитних полімерних матеріалів з наночастинками BаF₂ та SrF₂ / Т. Демкiв, О. Галяткiн, З. Хапко [та ін.] // Вісник Львів. ун-ту. Серія фізична. – 2015. – Вип. 50. – С. 64–71.
9. Demkiv T. M. Luminescent and kinetic properties of the polystyrene composites based on BaF₂ nanoparticles / T. M. Demkiv, O. O. Halyatkin, V. V. Vistovskyy [et al.] // Nuclear Instruments and Methods in Physics Research Section A. – 2016. – Vol. 810. – P. 1–5.
10. Demkiv T. M. X-ray excited luminescence of polystyrene-based scintillator loaded with LaPO₄–Pr nanoparticles / T. M. Demkiv, O. O. Halyatkin, V. V. Vistovskyy [et al.]  // J. Appl. Phys. – 2016. – Vol. 120, № 14. – P. 144301-1–144301-6.
11. Демків Т. Люмінесценція полістирольних композитів з вкрапленими наночастинками, отриманих з використанням статичного тиску / Т. Демкiв, О. Галяткiн, О. Перевiзник [та ін.] // Вісник Львів. ун-ту. Серія фізична. – 2016. – Вип. 51. – С. 52–61.
12. Чилiй М. О. Особливостi люмiнесценцiї автолокалiзованих екситонiв в монокристалах i наночастинках SrF₂ при рентгенiвському збудженнi / М. О. Чилiй, В. В. Вiстовський, А. В. Жишкович [та ін.] // Вісник Львів. ун-ту. Серія фізична – 2016. – Вип. 51. – С. 68–76.
13. Pushak A. S. Luminescent properties of LaI₃-Ce microcrystals embedded in NaI host / A. S. Pushak, V. V. Vistovskyy, T. M. Demkiv [et al.] // Functional Materials. – 2015. – № 4. – P. 434–439.
14. Demkiv T. M. Luminescence properties of CsPbBr₃ nanocrystals dispersed in a polymer matrix / T. M. Demkiv, S. V. Myagkota, T. Malyi [et al.] // Journal of Luminescence. – 2018. – Vol. 198. – Р. 103–107.
15. Chylii M. Quenching of exciton luminescence in SrF₂ nanoparticles within a diffusion model / M. Chylii, T. Demkiv, V. Vistovskyy [et al.]  // Journal of Applied Physics. – 2018. – Vol. 123, №3 – P. 034306-1–034306-6.
16. Chylii M. Diffusion of 5p-holes in BaF₂ nanoparticles / M. Chylii, T. Malyi, I. Rovetskyi, T. Demkiv [et al.]  // Optical Materials. – 2019. – Vol. 91. – P. 115-119.
17. Galchynsky O. V. Influence of stoichiometric cadmium excess on photoelectret properties of CdI₂-PbI₂ crystal system / O. V. Galchynsky, V. V. Vistovskyy, N. V. Gloskovska, L. I. Yarytska, T. M. Demkiv // Funct. Mater. – 2019. – Vol. 26, No.2.– P. 228-232.

He graduated with honors from the Faculty of Physics of Lviv State University (LSU) named after Ivan Franko in 1986. He received a full higher education in “Physics” and qualified as a physicist, teacher of physics.

From 1986 to 1989 he worked as an engineer and later as an intern-researcher at the Ivan Franko LSU Research Unit.

From 1989 to 1992 he was a graduate student of the Department of Semiconductor Physics, Ivan Franko State University.

From 1992 to 1994 he worked as a researcher at the Ivan Franko LSU Research Department.

In 1994 he defended his dissertation “Order and electronic properties of In4Se3 crystals”. He was awarded the degree of Candidate of Physical and Mathematical Sciences in Physics of Semiconductors and Dielectrics.

From 1994 to 2007 he taught at the Lviv Academy of Veterinary Medicine (since 2003 Lviv National University of Veterinary Medicine and Biotechnology named after SZ Gzhytsky) as a senior lecturer and associate professor of physics and mathematics.

In 2002 he was awarded the academic title of associate professor of physics and mathematics.

In 2007 he returned to work at the Ivan Franko National University of Lviv (LNU), where he still works as an associate professor at the Department of General Physics, Faculty of Physics.

From 2010 to 2018 he served as Deputy Dean of the Faculty of Physics of Ivan Franko Lviv National University for educational and methodological work.

From October 2015 to April 2016, he served as Head of the Department of General Physics.

On September 11, 2019 he defended his doctoral dissertation “Transformation of electronic excitations in composite luminescent materials.” He was awarded the degree of Doctor of Physical and Mathematical Sciences in the field of semiconductor and dielectric physics.

On December 16, 2019 he received a diploma of Doctor of Physical and Mathematical Sciences.

On November 1, 2020 he was transferred to the position of Professor of General Physics, Faculty of Physics.

Supervisor of candidate dissertations.

In different years he was the executor of state budget and economic contract topics. He has published 120 scientific papers. Received 7 patents of Ukraine for inventions and utility models.

Educational and methodical achievements: monograph, textbook, 5 textbooks and teaching materials.

Textbook:

Vakarchuk S. O. Physics: a textbook : [for higher education institutions (stamp of the Ministry of Education and Science of Ukraine)] / S. Vakarchuk, T. Demkiv, S. Myahkota – Lviv: Ivan Franko National University of Lviv, 2010. 458 p.

Study guides and methodological materials:

Fedyshyn Y. I. Laboratory workshop in physics : a textbook : [for higher education institutions (stamp of the Ministry of Education and Science of Ukraine)] / Y. I. Fedyshyn, T. M. Demkiv, T. V. Gembara. Hembara – Lviv: Svit, 2001. 224 p.
Sterilization and veterinary and sanitary examination of canned meat: a textbook: [for higher education institutions (stamp of the Ministry of Education and Science of Ukraine)] / R. Kravtsiv, Y. Fedyshyn, T. Demkiv [and others] – Lviv: Svit, 2002. 224 p.
Fedyshyn Y. I. Laboratory workshop in physics : a textbook : [for higher education institutions (stamp of the Ministry of Education and Science of Ukraine)] / Y. I. Fedyshyn, T. M. Demkiv, T. V. Gembara. Hembara – Lviv: Svit, 2006. 350 p.
Demkiv T. M. Fundamentals of the theory of errors of physical quantities Methodical materials for general physical workshop / T. M. Demkiv, O. I. Konopelnyk, Y. I. Shopa – Lviv: Ivan Franko National University of Lviv, 2008. 40 p.
Electricity and magnetism. Collection of problems with solutions: a textbook: [for higher education institutions] / Y. I. Shopa, V. M. Lesivtsiv, T. M. Demkiv – Lviv: Ivan Franko National University of Lviv, 2010. 288 p.
Myahkota S. Physics. Electricity and magnetism: a textbook / S.V. Myagkota, O.M. Vovk, A.S. Pushak, T.M. Demkiv – Lviv: UAD, 2016. – 200 p.
Physics. Electricity and magnetism: a workshop / Myagkota SV, Boyarchuk VM, Pushak AS, Vistovskyi VV, Demkiv T. – Lviv: LNAU, 2018. 173 p.

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