Selected Papers

- sorted by date of publication (more recent papers first) - pdf files included

Warning: The full-text articles are subject of copyright of publishing companies and the authors. They may be used for personal purposes only. All other uses, mainly reproduction by any mean, are prohibited unless the written permission of copyright holders is obtained.


J. Valenta, M. Greben, Z. Remeš, S. Gutsch, D. Hiller, and M. Zacharias

Determination of absorption cross-section of Si nanocrystals by two independent methods based on either absorption or luminescence

Appl. Phys. Lett. 108 (2016) 023102, doi:10.1063/1.4939699  (pdf)


I. Procházka, J. Čížek, J. Valenta, V. Havránek, P. Hruška, M. Novotný, and J. Lančok

Characterization of defects in ZnO implanted by hydrogen

Defects and Diffusion Forum 365 (2015) 49-54.   (pdf)

K. Kůsová, I. Pelant, and J. Valenta

Bright trions in direct-bandgap silicon nanocrystals revealed by low-temperature single nanocrystal spectroscopy

Light Science & Applications 4 (2015) e336, doi: 10.1038/lsa.2015.109

M. Greben, A. Fučíková, and J. Valenta

Photoluminescence quantum yield of PbS nanocrystals in colloidal suspensions

J. Appl. Phys. 117 (2015) 144306  (pdf)

J. Valenta and M. Greben

Radiometric calibration of optical microscopy and microspectroscopy apparata over a broad spectral range using a special thin-film luminescence standard

AIP Advances 5 (2015) 047131.  (pdf)

J. Čížek, J. Valenta, P. Hruška, O. Melikhova, I. Procházka, M. Novotný, J. Bulíř

Origin of green luminescence in hydrothermally grown ZnO single crystals

Appl. Phys. Lett. 106 (2015) 251902.   (pdf)


J. Ibáñez, S. Hernández, J. López-Vidrier, D. Hiller, S. Gutsch, M. Zacharias, A. Segura, J. Valenta, and B. Garrido

Optical emission from SiO2-embedded silicon nanocrystals: A high-pressure Raman and photoluminescence study

Phys. Rev. B 92(3) (2015) 035432.  (pdf).




J. Valenta

Determination of absolute luminescence quantum yields of luminescing nanomaterials over a broad spectral range: From the integrating sphere theory to the correct methodology

Nanoscience Methods 3 (2014) 11-27.   (pdf)


K. Kůsová, P. Hapala, J. Valenta, P. Jelínek, O. Cibulka, L. Ondič, and I. Pelant

Direct bandgap silicon: Tensile-strained silicon nanocrystals

Adv. Mater. Interfaces 1(2) (2014) 2196-7350, doi: 10.1002/admi.201300042.


A. Fucikova, J. Valenta, I. Pelant, M. Hubalek-Kalbacova, A. Broz,  B. Rezek, A. Kromka, and Z. Bakaeva

Silicon nanocrystals and nanodiamonds in live cells: Photoluminescence characteristics, cytotoxicity and interaction with cell cytoskeleton

RSC Advances 4 (2014) 10334-10342.   (pdf)


D. Hiller, A. Zelenina, S. Gutsch, S. A. Dyakov, L. López-Conesa, J. López-Vidrier, S. Estradé, F. Peiró, B. Garrido, J. Valenta, M. Kořínek, F. Trojánek, P. Malý, M. Schnabel, C. Weiss, S. Janz, and M. Zacharias

Absence of quantum confinement effects in the photoluminescence of Si3N4-embedded Si nanocrystals

J. Appl. Phys. 115 (2014) 204301.  (pdf)


M. Scholz, R. Dědic, J. Valenta, T. Breitenbach, J. Hála

Real-time luminescence microspectroscopy monitoring of singlet oxygen in individual cells

Photochem. & Photobiology Sciences 13 (2014) 1203-1212  (pdf)


J. Valenta, M. Greben, S. Gutsch, D. Hiller, M. Zacharias

Effects of inter-nanocrystal distance on luminescence quantum yield in ensembles of Si nanocrystals

Appl. Phys. Lett. 105 (2014) 243107, doi: 10.1063/1.4904472  (pdf)




Y. Zhi, J. Valenta, A. Meldrum

Structure of whispering gallery mode spectrum of microspheres coated with fluorescent silicon quantum dots

J. Optical Society of America B 30(11) (2013) 3079-3085.  (pdf)


B. Bruhn, J. Valenta, I. Sychugov, K. Mitsuishi, and J. Linnros

Transition from silicon nanowires to isolated quantum dots: Optical and structural evolution

Phys. Rev. B 87 (2013) 045404,    (pdf)




I. Sychugov, J. Valenta, K. Mitsuischi, and J. Linnros

Exciton localization in doped Si nanocrystals from single dot spectroscopy studies

Phys. Rev. B 86 (2012) 075311.  (pdf)


K. Kůsová, L. Ondič, E. Klimešová, K. Herynková, I. Pelant, S. Daniš, J. Valenta, M. Gallart, M. Ziegler, B. Hönerlage, and P. Gilliot

Luminescence of free-standing versus matrix-embedded oxide-passivated silicon nanocrystals: The role of matrix-induced strain

Appl. Phys. Lett. 101 (2012) 143101.  (pdf)


K. Dohnalová, A. Fučíková, C.P. Umesh, J. Humpolíčková, J.M.J. Paulusse, J. Valenta, H. Zuilhof, M. Hof, and T. Gregorkiewicz

Microscopic origin of the fast blue-green luminescence of chemically synthetized non-oxidized silicon quantum dots

Small 8(20) (2012) 3185-3191.   (pdf)




I. Sychugov, J. Valenta, K. Mitsuishi, M. Fujii, and J. Linnros

Photoluminescence measurements of zero-phonon optical transitions in silicon nanocrystals

Phys. Rev. B 84(12) (2011) 125326.   (pdf)


J. Valenta, B. Bruhn, and J. Linnros

Coexistence of quasi-1D and 0D photoluminescence from single silicon nanowires

Nano Letters 11(7) (2011) 3003-3009.   (pdf).


D. Timmerman, J. Valenta, K. Dohnalova, W.D.A.M. de Boer, T. Gregorkiewicz

Step-like enhancement of luminescence quantum yield of silicon nanocrystals

Nature Nanotechnology 6(11) (2011) 710-713 (doi: 10.1038/NNANO.2011.167)


B. Bruhn, J. Valenta, F. Sanggheleh, and J. Linnros

Blinking statistics of silicon quantum dots

Nano Letters 11(12) (2011) 5574-5580.  (pdf)




K. Kůsová, O. Cibulka, K. Dohnalová, I. Pelant, J. Valenta, A. Fucikova, K. Žídek, J. Lang, J. Englich, P. Matějka, P. Štepánek, S. Bakardjieva

Brightly luminescent organically capped silicon nanocrystals fabricated at room temperature and atmospheric pressure

ACS Nano 4(8) (2010) 4495.   (pdf)


V. Vlček, J. Čížek, J. Drahokoupil, J. Valenta, N. Miyajima, R. Skála

Defects in CaF2 caused by long-time irradiation and their response to annealing

Philosophical Magazine 90 (20) (2010) 2749.  (pdf)


N.N. Ha, K. Dohnalova, T. Gregorkiewicz, J. Valenta

Optical gain of the 1.54 mm emission in MBE grown Si:Er nanolayers

Phys. Rev. B 81 (2010) 195206.  (pdf)




B. Bruhn, J. Valenta, and J. Linnros

Controlled fabrication of silicon quantum rods yielding high intensity, polarized light emission

Nanotechnology 20 (2009), 505301 (doi: 10.1088/0957-4484/20/50/505301)     (pdf)


A. Fucikova, J. Valenta, I. Pelant, V. Brezina, and K. Kůsová

Novel use of silicon nanocrystals and nanodiamonds in biology

Chemical Papers 63 (6) (2009), 704-708.  (pdf)


K. Kůsová, O. Cibulka, K. Dohnalová, I. Pelant, A. Fučíková, J. Valenta

Yellow-emitting colloidal suspensions of silicon nanocrystals: Fabrication technology, luminescence performance and application prospects

Physica E 41 (2009) 982-985.   (doi:10.1016/j.physe.2008.08.022)   (pdf)


K. Svádová, A. Exnerova, P. Štys, E. Landová, J. Valenta, A. Fučíková, and R. Socha

Role of different colours of aposematic insects in learning, memory, and generalisation of naive bird predators

Animal Behaviour 77(2) (2009) 327-336. (doi:10.1016/j.anbehav.2008.09.034)   (pdf)




J. Valenta and I. Pelant

Comment on “Stimulated emission from trap electronic states in oxide of nanocrystal Si“ [Appl. Phys. Lett. 92, 221910 (2008)]

Appl. Phys. Lett. 93 (2008), 066101.  (pdf)


J. Valenta, A. Fucikova, I. Pelant, K. Kůsová, K. Dohnalová, A. Aleknavičius, O. Cibulka, A. Fojtík, and G. Kada

On the origin of the fast photoluminescence band in small silicon nanoparticles

New J. Phys. 10 (2008), 073022.  (pdf)


J. Valenta, A. Fucikova, F. Vácha, F. Adamec, J. Humplolíčková, M. Hof, I. Pelant, K. Kůsová, K. Dohnalová, and J. Linnros

Light-emission performance of silicon nanocrystals deduced from single quantum dot spectroscopy

Advanced Functional Materials 18 (2008) 2666-2672.   (pdf)


I. Pelant, R. Tomasiunas, V. Sirutkaitis, J. Valenta, T. Ostatnický, K. Kůsová, and R.G. Elliman

Ultrafast decay of femtosecond laser-induced grating in silicon-quantum-dot-based optical waveguides

J. Phys. D: Appl. Phys 41 (2008) 015103.   (pdf)




F. Vácha, F. Adamec, J. Valenta, and M. Vácha

Spatial location of photosystem pigment–protein complexes in thylakoid membranes of chloroplasts of Pisum sativum studied by chlorophyll fluorescence

J. Luminescence 122-123 (2007) 301-303.  (pdf)


F. Vacha, V. Sarafis, Z. Benediktyova, L. Bumba, J. Valenta, M. Vacha, Ch.-R. Sheue, and L. Nedbal

Identification of Photosystem I and Photosystem II enriched regions of thylakoid membrane by optical microimaging of cryo-fluorescence emission spectra and of variable fluorescence

The Micron 38 (2007) 170-175.   (pdf)


P. Janda, J. Valenta, J.-L. Rehspringer, R.R. Mafouana, J. Linnros, and R.G. Elliman

Modified spontaneous emission of silicon nanocrystals embedded in artificial opals

J. Phys. D: Appl. Phys. 40 (2007) 5847-5853.  (pdf)




I. Pelant, T. Ostatnický, J. Valenta, K. Luterová, E. Skopalová, T. Mates, and R.G. Elliman

Waveguide cores containing silicon nanocrystals as active spectral filters for silicon-based photonics

Appl. Phys. B 83 (1) (2006) 87-91. (doi: 10.1007/s00340-005-2118-5)   (pdf)


I. Sychugov, R. Juhasz, J. Valenta, M. Zhang, P. Pirouz, and J. Linnros

Ligh emission from silicon nanocrystals: Probing a single quantum dot

Applied Surface Science 252 (2006) 5249-5253.   (pdf)


A. Fojtík, J. Valenta, The Ha Stuchlíková, J. Stuchlík, I. Pelant, and J. Kočka

Electroluminescence of silicon nanocrystal in p-i-n diode structures

Thin Solid Films 515 (2006) 775-777.  (pdf)


 P. Janda, J. Valenta, T. Ostatnický, I. Pelant, and R.G. Elliman

Light propagation in planar optical waveguides made of silicon nanocrystals buried in silica glass

Thin Solid Films 515 (2006) 797-800.  (pdf)


 K. Luterová, E. Skopalová, I. Pelant, M. Rejman, T. Ostatnický, J. Valenta

Active planar optical waveguides with silicon nanocrystals: Leaky modes under different ambient conditions

J. Appl. Phys. 100 (7) (2006) 074307.  (pdf)


 P. Janda, J. Valenta, T. Ostatnický, E. Skopalová, I. Pelant, R.G. Elliman, R. Tomasiunas

Silicon nanocrystals in silica – Novel active waveguides for nanophotonics

J. Luminescence 121 (2006) 267-273.  (pdf)


 K. Dohnalová, K. Kůsová, I. Pelant, J. Valenta, P. Gilliot, M. Gallart, O. Crégut, J.L. Rehspringer, and B. Hönerlage

Emission properties of a distributed feedback laser cavity containing silicon nanocrystals

J. Luminescence 121 (2006) 259-262.  (pdf)




T. Ostatnický, J. Valenta, I. Pelant, K. Luterová, R.G. Elliman, S. Cheylan, and B. Hönerlage

Photoluminescence from an active planar optical waveguide made of silicon nanocrystals: Dominance of leaky substrate modes in dissipative structures

Optical Materials 27(5) (2005) 781-786.  (pdf)


I. Sychugov, R. Juhasz, A. Galeckas, J. Valenta, J. Linnros

Single dot optical spectroscopy of silicon nanocrystals: low temperature measurements

Optical Materials 27(5) (2005) 973-976.   (pdf)


K. Luterová, M. Cazzanelli, J.-P. Likforman, J. Valenta, T. Ostatnický, K. Dohnalová, S. Cheylan, P. Gilliot, B. Hönerlage, L. Pavesi, I. Pelant

Optical gain in nanocrystalline silicon: Comparison of planar waveguide geometry with a non-waveguiding ensemble of nanocrystals

Optical Materials 27(5) (2005) 750-755.   (pdf)


J. Valenta, P. Janda, K. Dohnalová, D. Nižňanský, F. Vácha, J. Linnros

Colloidal suspensions of silicon nanocrystals: from single nanocrystals to photonic structures

Optical Materials 27(5) (2005) 1046-1049.   (pdf)


I. Sychugov, R. Juhasz, J. Valenta, and J. Linnros

Narrow luminescence linewidth of a silicon quantum dot

Physical Review Letters 94 (2005) 087405 (pdf)


I. Sychugov, R. Juhasz, J. Linnros, and J. Valenta

Luminescence blinking of a Si quantum dot in a SiO2 shell

Physical Review B 71 (2005) 115331.   (pdf)




K. Dohnalová, K. Luterová, J. Valenta, J. Buršík, M. Procházka, V. Křesálek, B. Hönerlage, I. Pelant

Grains of porous silicon embedded in SiO2: Studies of optical gain and electroluminescence

Solid State Phenomena 99-100 (2004) 31-36. 


J. Valenta, N. Lalic, J. Linnros

Electroluminescence of single silicon nanocrystals

Applied Physics Letters 84 (2004) 1459-1461.   (pdf)


J. Valenta, T. Ostatnický, I. Pelant, R.G. Elliman, J. Linnros, and B. Hönerlage

Microcavity-like leaky mode emission from a planar optical waveguide made of luminescent silicon nanocrystals

J. Appl. Phys. 96(9) (2004) 5222-5225.  (pdf)




J. Valenta, I. Pelant, K. Luterová, R. Tomasiunas, S. Cheylan, R.G. Elliman, J. Linnros, and B. Hönerlage

An active planar optical waveguide made from luminescent silicon nanocrystals

Applied Physics Letters  82 (6) (2003) 955-957.   (pdf)


 J. Valenta, J. Linnros, R. Juhasz, J.-L. Rehspringer, F. Huber, Ch. Hirlimann, S. Cheylan, and R.G. Elliman

Photonic band-gap effects on photoluminescence of silicon nanocrystals embedded in artificial opals

J. Applied Physics 93 (2003) 4471-4474.   (pdf)




J. Valenta, R. Juhasz, and J. Linnros

Optical spectroscopy of single silicon quantum dots

Applied Physics Letters  80 (6) (2002) 1070-1072.   (pdf)


J. Valenta, I. Pelant, and J. Linnros

Waveguiding effects in the measurement of optical gain in a layer of Si nanocrystals

Applied Physics Letters  81 (8) (2002) 1396-98.   (pdf)


 J. Valenta, R. Juhasz, and J. Linnros

Photoluminescence from single silicon quantum dots at room temperature

 J. Luminescence 98  (2002) 15-22.   (pdf)


V. Švrček, I. Pelant, J.-L. Rehspringer, P. Gilliot, D. Ohlman, O. Crégut, B. Hönerlage, T. Chvojka, J. Valenta, and J. Dian

Photoluminescence properties of sol-gel derived SiO2 films doped with porous silicon

Materials Science & Engineering C 19 (1-2) (2002) 233-236. 


T. Holec, T. Chvojka, I. Jelínek, J. Jindřich, I. Němec, I. Pelant, J. Valenta, and J. Dian

Determination of sensoric parameters of porous silicon in sensing of organic vapors

Materials Science & Engineering C 19 (1-2) (2002) 251-254. 




J. Valenta, N. Lalic, and J. Linnros

Electroluminescence microscopy and spectroscopy of silicon nanocrystals in thin SiO2 layers

Optical Materials 17 (2001) 45-50.  (pdf)


J. Valenta, J. Dian, P. Gilliot, and B. Hönerlage

Photoluminescence and optical gain in CuBr semiconductor nanocrystals

physica status solidi (b) 224 (2001) 313-317.   (pdf)


 J. Valenta, J. Dian, K. Luterová, I. Pelant, J. Buršík, D. Nižňanský

Electroluminescence from sol-gel derived film of CdS nanocrystals

physica status solidi (a) 184 (2001) R1-R3.   (pdf)




J. Dian, J. Valenta, K. Luterová, I. Pelant, M. Nikl, D. Muller, J.J. Grob, J.-L. Rehspringer, and B. Hönerlage

Optical properties of Si+-ion implanted sol-gel derived SiO2 films

Materials Science & Engineering B 69-70 (2000) 564-569. 


J. Valenta, J. Dian, K. Luterová, P. Knápek, I. Pelant, M. Nikl, D. Muller, J.-J. Grob, J.-L. Rehspringer, and B. Hönerlage

Temperature behaviour of optical properties of Si+- implanted SiO2

European Physical Journal D 8 (2000) 395-398.  (pdf)


J. Valenta, J. Dian, P. Gilliot, and R. Levy

Growth and decay of persistent spectral holes in CuBr semiconductor quantum dots

J. Luminescence 86 (2000) 341.   (pdf)


K. Luterová, P. Fojtík, A. Poruba, J. Dian, J. Valenta, Ha Stuchlíková, J. Štěpánek, J. Kočka, I. Pelant

Light Emitting  Wide Band Gap a-Si:H Deposited by Microwave Electron-Cyclotron-Resonance Plasma-Enhanced Chemical Vapour Deposition

J. Non-Crystalline Solids 266-69 (2000) 583-587.  


K. Luterová, I. Pelant, P. Fojtík, M. Nikl, I. Gregora, J. Kočka, J. Dian, J. Valenta, P. Malý, J. Kudrna, J. Štěpánek, A. Poruba, P. Horváth

Visible photoluminescence and electroluminescence in wide bandgap hydrogenated amorphous silicon

Philosophical Magazine B  80 (2000) 1811-1832.


K. Luterová, A. Poruba, J. Dian, O. Salyk, P. Horváth, P. Knápek, J. Valenta, J. Kočka, and I. Pelant

Wide gap hydrogenated amorphous silicon for visible light emission

J. Porous Materials 7 (2000) 135-138.  (pdf)


K. Luterová, I. Pelant, J. Valenta, J.-L. Rehspringer, D. Müller, J. J. Grob, J. Dian, B. Hönerlage

Red electroluminescence in Si+ implanted sol-gel derived SiO2 films

Applied Physics Letters 77 (2000) 2952-2954.   (pdf)


J. Dian, T. Holec, I. Jelínek, J. Jindřich, J. Valenta, and I. Pelant

Time evolution of photoluminescence response from porous silicon in hydrocarbon gas sensing

physica status solidi (a) 182 (2000) 485-488.  (pdf)


1993 - 1999


J. Valenta, J. Dian, J. Hála, P. Gilliot, and R. Levy

Persistent spectral hole-burning and hole-filling in CuBr semiconductor nanocrystals

J. Chemical Physics 111 (1999) 9398-9405.   (pdf)


J. Dian, J. Valenta, J. Hála, A. Poruba, P. Horváth, K. Luterová, I. Gregora, and I. Pelant

Visible photoluminescence in hydrogenated amorphous silicon grown in microwave plasma from SiH4 strongly diluted with He

J. Applied Physics 86 (1999) 1415-1419.   (pdf)


K. Luterová, P. Knápek, J. Stuchlík, J. Kočka, J. Kudrna, P. Malý, J. Valenta, J. Dian, B. Hönerlage, and I. Pelant

Hydrogenated amorphous silicon deposited by glow discharge of SiH4 highly diluted with He: photoluminescence and electroluminiscence in the visible region

J. Non-Crystalline Solids 227-230 (1998) 254-258. 


J. Moniatte, P. Gilliot, J. Valenta, and A.I. Ekimov

Exciton dephasing time in CuBr quantum dots

Optical Materials 9 (1998) 516-519.   (pdf)


I. Pelant, K. Luterová, P. Knápek, J. Kočka, J. Stuchlík, A. Poruba, S. Surandan, J. Valenta, J. Dian, B. Hönerlage

Photoluminescence and electroluminescence of wide-gap amorphous hydrogenated silicon prepared under high dilution with He

physica status solidi (a) 165 (1998) 25-29. 


J. Valenta, J. Moniatte, P. Gilliot, B. Hönerlage, J.B. Grun, R. Levy, and A.I. Ekimov

Dynamics of excitons in CuBr nanocrystals: Spectral-hole burning and transient four-wave-mixing measurements

Physical Review B 56 (1998) 1774-1783.  (pdf)


J. Valenta, J. Moniatte, P. Gilliot, R. Levy, B. Hönerlage, and A.I. Ekimov

Hole-Filling of Persistent Spectral Holes in the Excitonic Absorption Band of CuBr Quantum Dots

Applied Physics Letters 70 (1997) 680-682.   (pdf)


P. Malý, F. Trojánek, J. Kudrna, A. Hospodková, S. Banáš, V. Kohlová, J. Valenta, and I. Pelant

Picosecond and Milisecond Dynamics of Photoexcited Carriers in Porous Silicon

Physical Review B 54 (1996) 7299-7306.  


A. Chergui, J. Valenta, J. Moniatte, P. Gilliot, J.B. Grun, T. Cloitre, and R.L. Aulombard

Characterization of ZnSe Epitaxial Layers by Four-Wave-Mixing Experiments

Semiconductor Science & Technology 11 (1996) 952-958.   (pdf)


J. Valenta, D. Guennani, A. Manar, B. Hönerlage, T. Cloitre, and R.L. Aulombard

Optical Gain in ZnS epilayers

Solid State Communications 98 (1996) 695-700.   (pdf)


D. Guennani, J. Valenta, A. Manar, J.B. Grun, T. Cloitre, O. Briot, and R.L. Aulombard

Excitons and Biexcitons in MOVPE-Grown ZnS Epitaxial Layers

Solid State Communications 96 (1995) 637-643.  (pdf)


F. Trojánek, P. Malý, I. Pelant, A. Hospodková, V. Kohlová, and J. Valenta

Picosecond Dynamics of Photoexcited Carriers in Free Standing Porous Silicon

Thin Solid Films 255 (1995) 77-79.   (pdf)


J. Valenta, I. Pelant, V. Kohlová, V. Bradnová, M. Trchová, J. Klimovič, and J. Hála

Time-resolved Photoluminescence Study of AgCl:Cd2+ Crystalline Foils: Excitation Energy Transfer

Journal of Physics: Condensed Matter 7 (1995) 433-446.  


A. Chergui, J. Valenta, J.L. Loison, M. Robino, I. Pelant, J.B. Grun, R. Levy, O. Briot, and R.L. Aulombard

Optical Characterisation of Pure MOVPE-Grown ZnSe Epilayers

Semiconductor Science & Technology 9 (1994) 2073-2079.  (pdf)


P. Malý, F. Trojánek, J. Valenta, V. Kohlová, S. Banáš, M. Vácha, F. Adamec, J. Dian, J. Hála, and I. Pelant

Luminescence and Nonlinear Optical Properties of Porous Silicon

J. Luminescence 60-61 (1994) 441-444.  


I. Pelant, J. Dian, J. Matoušková, J. Valenta, J. Hála, M. Ambrož, M. Vácha, V. Kohlová, K. Vojtěchovský, and K. Kašlík

Photoluminescence Assesment of B, P and Al in Si Waters: The Problem of Sample Heating by a Laser Beam

J. Applied Physics 73 (1993) 3477-3481.   (pdf)





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