Photographer: onbekend

prof. dr. T. (Tom) Gregorkiewicz


  • Faculty of Science
    Van der Waals-Zeeman Instituut
  • Visiting address
    Science Park A
    Science Park 904  Amsterdam
    Room number: C4.233
  • Postal address:
    Postbus  94485
    1090 GL  Amsterdam
  • T.Gregorkiewicz@uva.nl
    T: 0205255643

Vacancies

Post-doc : 1-year position to contribute to the project: CARRIER MULTIPLICATION IN Ge NANOCRYSTALS - see PROJECTS in the homepage of Tom Gregorkiewicz Group: http://www.science.uva.nl/research/elecmat/

PhD Students: 4-year contract (AIO) working on the project: SPECTRAL SHAPING FOR SMART PHOTOVOLTAICS - see PROJECTS in the homepage of Tom Gregorkiewicz Group
MS and BS students: TGG welcomes highly motivated students who would like to participate in cutting-edge research in the field of nanomaterials. We have constantly new openings for bachelor and master projects - contact us directly for the current opportunities.

2017

2016

  • Ha, N. N., Nishikawa, A., Fujiwara, Y., & Gregorkiewicz, T. (2016). Investigation of optical gain in Eu-doped GaN thin film grown by OMVPE method. Journal of Science: Advanced Materials and Devices, 1(2), 220-223. DOI: 10.1016/j.jsamd.2016.06.004  [details] 
  • de Jong, E. M. L. D., Mannino, G., Alberti, A., Ruggeri, R., Italia, M., Zontone, F., ... Faraci, G. (2016). Strong infrared photoluminescence in highly porous layers of large faceted Si crystalline nanoparticles. Scientific Reports, 6, [25664]. DOI: 10.1038/srep25664  [details] 
  • Data, P., Bialoglowski, M., Lyzwa, K., Bacewicz, R., Dluzewski, P., Lapkowski, M., ... Monkman, A. P. (2016). Kesterite Inorganic-Organic Heterojunction for Solution Processable Solar Cells. Electrochimica Acta, 201, 78-85. DOI: 10.1016/j.electacta.2016.03.132 
  • Bruhn, B., Limpens, R., Chung, N. X., Schall, P., & Gregorkiewicz, T. (2016). Spectroscopy of carrier multiplication in nanocrystals. Scientific Reports, 6, [20538]. DOI: 10.1038/srep20538  [details] 
  • Limpens, R., Luxembourg, S. L., Weeber, A. W., & Gregorkiewicz, T. (2016). Emission efficiency limit of Si nanocrystals. Scientific Reports, 6, [19566]. DOI: 10.1038/srep19566  [details] 
  • Nguyen, C., Limpens, R., Lesage, A., Fujii, M., & Gregorkiewicz, T. (2016). Optical generation of electron–hole pairs in phosphor and boron co-doped Si nanocrystals in SiO2. Physica Status Solidi (A) Applications and Materials Science, 213(11), 2863-2866. DOI: 10.1002/pssa.201600381 
  • de Jong, E. M. L. D., Yamashita, G., Gómez Navascués, L., Ashida, M., Fujiwara, Y., & Gregorkiewicz, T. (2016). Multiexciton lifetime in all-Inorganic CsPbBr3 perovskite nanocrystals. The Journal of Physical Chemistry. C, DOI: 10.1021/acs.jpcc.6b10551.
  • de Weerd, C., Gomez, L., Zhang, H., Buma, W. J., Nedelcu, G., Kovalenko, M. V., & Gregorkiewicz, T. (2016). Energy Transfer between Inorganic Perovskite Nanocrystals. The Journal of Physical Chemistry. C, 120(24), 13310-13315. DOI: 10.1021/acs.jpcc.6b04768 
  • Ha, N. N., Giang, N. T., Khiem, T. N., Dung, N. D., & Gregorkiewicz, T. (2016). Spectral probing of carrier traps in Si–Ge alloy nanocrystals. Physica Status Solidi - Rapid Research Letters, 10(11), 824-827. DOI: 10.1002/pssr.201600304 
  • Inaba, T., Lee, D-G., Wakamatsu, R., Kojima, T., Mitchell, B., Capretti, A., ... Fujiwara, Y. (2016). Substantial enhancement of red emission intensity by embedding Eu-doped GaN into a microcavity. AIP advances, 6(4), [045105]. DOI: 10.1063/1.4946849  [details] 
  • Lin, J., Gómez Navascués, L., De Weerd, C., Fujiwara, Y., Gregorkiewicz, T., & Suenaga, K. (2016). Direct Observation of Band Structure Modifications in Nanocrystals of CsPbBr3 Perovskite. Nano Letters, 16(11), 7198-7202. DOI: 10.1021/acs.nanolett.6b03552 
  • Linnros, J., Gregorkiewicz, T., Fujii, M., & Reed, M. (2016). Group-IV semiconductors at the nanoscale. Physica Status Solidi (A) Applications and Materials Science, 213(11), 2861. DOI: 10.1002/pssa.201670676 
  • Tonezzer, M., Gregorkiewicz, T., Van Hieu, N., & Valero, E. L. (2016). A special section on nanomaterials for an environment 2.0. Journal of Nanoscience and Nanotechnology, 16(8), 7849-7851. DOI: 10.1166/jnn.2016.12744 

2015

  • Ding, Y., Wu, F., Zhang, Y., Liu, X., de Jong, E. M. L. D., Gregorkiewicz, T., ... Zhang, H. (2015). Interplay between Static and Dynamic Energy Transfer in Biofunctional Upconversion Nanoplatforms. The Journal of Physical Chemistry Letters, 6(13), 2518-2523. DOI: 10.1021/acs.jpclett.5b00999  [details] 
  • Ha, N. N., Giang, N. T., Thuy, T. T. T., Trung, N. N., Dung, N. D., Saeed, S., & Gregorkiewicz, T. (2015). Single phase Si(1-x)Ge(x) nanocrystals and the shifting of the E1 directenergy transition. Nanotechnology, 26, [375701].
  • Limpens, R., Lesage, A., Stallinga, P., Poddubny, A. N., Fujii, M., & Gregorkiewicz, T. (2015). Resonant energy transfer in Si nanocrystal solids. The Journal of Physical Chemistry. C, 119, [064303].
  • Limpens, R., Lesage, A., Fujii, M., & Gregorkiewicz, T. (2015). Size confinement of Si nanocrystals in multinanolayer structures. Scientific Reports, 5, [17289]. DOI: 10.1038/srep17289  [details] 
  • Saeed, S., de Jong, E. M. L. D., & Gregorkiewicz, T. (2015). Step-like increase of quantum yield of 1.5 mu m Er-related emission in SiO2 doped with Si nanocrystals. Journal of Applied Physics, 117(6), [064303]. DOI: 10.1063/1.4907759  [details] 
  • Saeed, S., de Weerd, C., Stallinga, P., Spoor, F. C. M., Houtepen, A. J., Siebbeles, L. D. A., & Gregorkiewicz, T. (2015). Carrier multiplication in germanium nanocrystals. Light: Science & Applications, 4, [e251]. DOI: 10.1038/lsa.2015.24  [details] 
  • de Jong, E. M. L. D., Saeed, S., Sinke, W. C., & Gregorkiewicz, T. (2015). Generation of hot carriers for photon management in future photovoltaics. Solar Energy Materials and Solar Cells, 135, 67-71. DOI: 10.1016/j.solmat.2014.09.039  [details] 
  • Chung, N. X., Limpens, R., & Gregorkiewicz, T. (2015). Investigating photo¬luminescence quantum yield of silicon nanocrystals formed in SiOx with different initial Si excess. In Next Generation Technologies for Solar Energy Conversion VI. SPIE 9562. DOI: 10.1117/12.2191105 

2014

2013

2012

  • Dohnalová, K., Fučiková, A., Umesh, C. P., Humpoličková, J., Paulusse, J. M. J., Valenta, J., ... Gregorkiewicz, T. (2012). Microscopic origin of the fast blue-green luminescence of chemically synthesized non-oxidized silicon quantum dots. Small, 8(20), 3185-3191. DOI: 10.1002/smll.201200477  [details] 
  • Timmerman, D., & Gregorkiewicz, T. (2012). Power-dependent spectral shift of photoluminescence from ensembles of silicon nanocrystals. Nanoscale Research Letters, 7, 389. DOI: 10.1186/1556-276X-7-389  [details] 
  • Timmerman, D., Saeed, S., Gregorkiewicz, T., Roldán Gutiérrez, M. A., & Molina, S. I. (2012). Investigation of saturation and excitation behavior of 1.5 μm emission from Er3+ ions in SiO2 sensitized with Si nanocrystals. Physica Status Solidi, C(9), 2312-2317. DOI: 10.1002/pssc.201200311  [details] 
  • Trinh, M. T., Limpens, R., de Boer, W. D. A. M., Schins, J. M., Siebbeles, L. D. A., & Gregorkiewicz, T. (2012). Direct generation of multiple excitons in adjacent silicon nanocrystals revealed by induced absorption. Nature Photonics, 6, 316-320. DOI: 10.1038/NPHOTON.2012.36  [details] 
  • de Boer, W. D. A. M., Timmerman, D., Roldán Gutiérrez, M. A., Molina, S. I., & Gregorkiewicz, T. (2012). Photoluminescence excitation spectroscopy of Si nanocrystals in SiO2. ECS Transactions, 45(5), 3-8. DOI: 10.1149/1.3700404  [details] 
  • de Boer, W. D. A. M., Timmerman, D., Gregorkiewicz, T., Zhang, H., Buma, W. J., Poddubny, A. N., ... Yassievich, I. N. (2012). Self-trapped exciton state in Si nanocrystals revealed by induced absorption. Physical Review B, 85(16), [161409]. DOI: 10.1103/PhysRevB.85.161409  [details] 

2011

  • Ha, N. N., Cueff, S., Dohnalová, K., Trinh, M. T., Rizk, R., Labbé, C., ... Gregorkiewicz, T. (2011). Photon cutting for excitation Er3+ions in SiO2 sensitized by Si qunatum dots. Physical Review B, 84(24). DOI: 10.1103/PhysRevB.84.241308  [details] 
  • Ha, N. N., Dohnalová, K., & Gregorkiewicz, T. (2011). Evaluation of free carrier losses to 1.54 mu m emission in Si/Si: Er nanolayers on SOI substrate for optical gain observation. Optical Materials, 33(7), 1094-1096. DOI: 10.1016/j.optmat.2010.08.025  [details] 
  • Saeed, S., Timmerman, D., & Gregorkiewicz, T. (2011). Dynamics and microscopic origin of fast 1.5 μm emission in Er-doped SiO2 sensitized with Si nanocrystals. Physical Review B, 83. DOI: 10.1103/PhysRevB.83.155323  [details] 
  • Timmerman, D., Valenta, J., Dohnalová, K., de Boer, W. D. A. M., & Gregorkiewicz, T. (2011). Step-like enhancement of luminescence quantum yield of silicon nanocrystals. Nature Nanotechnology, 6, 710-713. DOI: 10.1038/NNANO.2011.167  [details] 
  • Timmerman, D., Saeed, S., & Gregorkiewicz, T. (2011). Fast dynamics of 1.5 μm photoluminescence in Er-doped SiO2 sensitized with Si nanocrystals. Optical Materials, 33(7), 1091-1093. DOI: 10.1016/j.optmat.2010.12.002  [details] 
  • Wang, Y., Liu, K., Liu, X., Dohnalová, K., Gregorkiewicz, T., Kong, X., ... Zhang, H. (2011). Critical shell thickness of core/shell upconversion luminescence nanoplatform for FRET application. The Journal of Physical Chemistry Letters, 2(17), 2083-2088. DOI: 10.1021/jz200922f  [details] 
  • de Boer, W. D. A. M., Trinh, M. T., Timmerman, D., Schins, J. M., Siebbeles, L. D. A., & Gregorkiewicz, T. (2011). Increased carrier generation rate in Si nanocrystals in SiO2 investigated by induced absorption. Applied Physics Letters, 99(5). DOI: 10.1063/1.3622308  [details] 

2010

  • Ha, N. N., Dohnalová, K., Gregorkiewicz, T., & Valenta, J. (2010). Optical gain of the 1.54 μm emission in MBE-grown Si:Er nanolayers. Physical Review B, 81(19), 195206-195206. DOI: 10.1103/PhysRevB.81.195206  [details] 
  • Ha, N. N., Dohnalová, K., Gregorkiewicz, T., & Valenta, J. (2010). Publisher's note: Optical gain of the 1.54 μm emission in MBE-grown Si:Er nanolayers [Phys. Rev. B 81, 195206 (2010)]. Physical Review B, 81(23), 239902(E). DOI: 10.1103/PhysRevB.81.239902 
  • Ha, N. N., Dohnalová, K., Gregorkiewicz, T., & Valenta, J. (2010). Upper limit of optical gain in MBE-grown Si:Er. Physical Review B, B(81), 195206: 1-6-239902:1.
  • Timmerman, D., Izeddin, I., & Gregorkiewicz, T. (2010). Saturation of luminescence from Si nanocrystals embedded in SiO2. Physica Status Solidi A, 207(1), 183-187. DOI: 10.1002/pssa.200925363  [details] 
  • de Boer, W. D. A. M., Timmerman, D., Dohnalová, K., Yassievich, I. N., Zhang, H., Buma, W. J., & Gregorkiewicz, T. (2010). Red spectral shift and enhanced quantum efficiency in phonon-free photoluminescence from silicon nanocrystals. Nature Nanotechnology, 5(12), 878-884. DOI: 10.1038/nnano.2010.236  [details] 

2009

  • Minissale, S., Vinh, N. Q., Bresler, M. S., & Gregorkiewicz, T. (2009). THz transitions within the ground state of Er3+ ions in Si. Physical Review B, 1-5.
  • Minissale, S., Vinh, N. Q., & Gregorkiewicz, T. (2009). On relation between the 1.5 μm Er-related emission and the 9 μm vibrational modes of oxygen in Si. Physica E : Low-dimensial Systems & Nanostructures, 41, 1054.
  • Timmerman, D., & Gregorkiewicz, T. (2009). "Space-separated quantum cutting in differently prepared solid-state dispersions of Si nanocrystals and Er3+ ions in SiO2". Materials Science and Engineering B-Advanced Functional Solid-State Materials, 87-89, 159-160.
  • Vinh, N. Q., Ha, N. N., & Gregorkiewicz, T. (2009). Photonic properties of Er-doped crystalline silicon. Proceedings of the IEEE, 97(7), 1269-1283. DOI: 10.1109/JPROC.2009.2018220  [details] 
  • Ngoc, N. M., Krasilnik, Z. F., & Gregorkiewicz, T. (2009). Optical properties of Si/Si:Er multi-nanolayer structures grown by SMBE method. Physica B-Condensed Matter, 23-24, 5131-5136.
  • Prokofiev, A. A., Moskalenko, A. S., Yassievich, I. N., de Boer, W. D. A. M., Timmerman, D., Zhang, H., ... Gregorkiewicz, T. (2009). Direct bandgap optical transitions in Si nanocrystals. JETP Letters, 90(12), 758-762. DOI: 10.1134/S0021364009240059  [details] 

2008

  • Izeddin, I., Klik, M. A. J., Vinh, N. Q., Bresler, M. S., & Gregorkiewicz, T. (2008). Mid-infrared spectroscopy of the Er-related donor state in Si/Si:Er3+ nanolayers. Materials Science and Engineering B-Advanced Functional Solid-State Materials, 146(1-3), 131-134. DOI: 10.1016/j.mseb.2007.07.082  [details] 
  • Izeddin, I., Timmerman, D., Gregorkiewicz, T., Moskalenko, A. S., Prokofiev, A. A., Yassievich, I. N., & Fujii, M. (2008). Energy transfer in Er-doped SiO2 sensitized with Si nanocrystals. Physical Review B, 78(3), 035327. DOI: 10.1103/PhysRevB.78.035327  [details] 
  • Minissale, S., Vinh, N. Q., & Gregorkiewicz, T. (2008). Pump-probe investigations of THz transitions in Si/Si:Er3+ nanolayers. Materials Science and Engineering B-Advanced Functional Solid-State Materials, 146(1-3), 160-162. DOI: 10.1016/j.mseb.2007.07.034  [details] 
  • Minissale, S., Vinh, N. Q., de Boer, W., Bresler, M. S., & Gregorkiewicz, T. (2008). Microscopic evidence for role of oxygen in luminescence of Er3+ ions in Si: Two-color and pump-probe spectroscopy. Physical Review B, 78(3), 035313. DOI: 10.1103/PhysRevB.78.035313  [details] 
  • Timmerman, D., Izeddin, I., dr. Stallinga, P., Yassievich, I. N., & Gregorkiewicz, T. (2008). Space-separated quantum cutting with silicon nanocrystals for photovoltaic applications. Nature Photonics, 2, 105-109. DOI: 10.1038/nphoton.2007.279  [details] 
  • Vrielinck, H., Zverev, D., Smet, P. F., Poelman, D., Gregorkiewicz, T., & Callens, F. (2008). Electron paramagnetic resonance study of centres involved in storage processes in K2YF5: RE thermoluminescent phosphors. Materials Science and Engineering B-Advanced Functional Solid-State Materials, 146(1-3), 16-21. DOI: 10.1016/j.mseb.2007.07.039  [details] 

2017

  • Ortega-Liebana, M. C., Nguyen, X. C., Limpens, R., Gómez Navascués, L., Hueso, J. L., Santamaria, J., & Gregorkiewicz, T. (2017). Uniform luminescent carbon nanodots prepared by rapid pyrolysis of organic precursors confined within nanoporous templating structures. Carbon, [CARBON-D-17-00339R1].
  • Nguyen, X. C., Gregorkiewicz, T., & Limpens, R. (2017). Photoluminescence quantum yield in ensembles of Si nanocrystals. Advanced Optical Materials, 5(4), 201600709. [10.1002/adom.201600709]. DOI: 10.1002/adom.201600709 

2015

  • Nguyen, X. C., Gregorkiewicz, T., & Limpens, R. (2015). Investigating photoluminescence quantum yield of silicon nanocrystals formed in SiOx with different initial Si excess. In SPIE. (pp. 9562O)

2012

2008

2011

  • de Boer, W., Limpens, R., & Gregorkiewicz, T. (2011). Oogverblindende silicium nanokristallen?! Nederlands Tijdschrift voor Natuurkunde, 77(5), 148-151. [details] 

Keynote / invited lecture

  • Gregorkiewicz, Tom (speaker) (3-10-2016): Efficient energy recycling in Si nanocrystals, – The 3rd International Conference on Advanced Materials and Nanotechnology, Hanoi, October 2016, Hanoi, Viet Nam.
  • Gregorkiewicz, Tom (speaker) (18-1-2016): Energy recycling and transfer in Si nanocrystals, MISW2 Winter School, Korea, Republic of.

2017

This list of publications is extracted from the UvA-Current Research Information System. Questions? Ask the library  or the Pure staff  of your faculty / institute. Log in to Pure  to edit your publications.
  • No ancillary activities

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