Predgovor

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Oznaka: 0098045

POLUVODIČKI MATERIJALI ZA OPTOELEKTRONIKU

SEMICONDUCTOR MATERIALS FOR OPTOELECTRONICS
Voditelj projekta: dr. sc. Branko Šantić

Tel. ++385 1 4571 278   e-mail: [e-mail]

Suradnici
Branko Šantić, doktor fiz. znanosti, viši znanstveni suradnik

Program rada i rezultati na projektu:

Istraživani su materijali koji se primjenjuju u optoelektronici, i to posebice tzv. nitridni poluvodiči  (GaN, Al_xIn_1-xN, In_xGa_1-xN). Nastavljeno je proučavanje električnog transporta u tankim nitridnim filmovima. I dalje je aktualan važan problem p-tipa dopiranja jer je magnezij jedini plauzibilan akceptorski dopand. Stoga je proučavanje svojstava Mg-akceptora od iznimne važnosti za primjene. Pristupilo se novom i detaljnom modeliranju statističkih svojstava Mg- akceptora, i to u modelu vrpce što nije standardan pristup problemu. Preliminarni rezultati pokazuju da jedino energetska vrpca a ne izolirani energetski nivo mogu objasniti raspršenost literaturnih podataka za dubinu nivoa te razlike u uspješnosti dopiranja. Nadalje, nastavljeno je proučavanje spektara katodo-luminescencije (CL) na magnezijem dopiranim nitridima, te su ti rezultati korelirani s rezultatima električnih mjerenja i sa statističkim modelima. Otpočela su ispitivanja slojeva aluminij nitrida i galij nitrida jako dopiranih silicijem ili magnezijem pomoću metoda ERDA (Elastic Recoil Detection Analysis) i TOF (Time of Flight), u nastojanju da se odrede količine i raspodjele dopanada, te opaze i identificiraju slojevi s eventualno povećanom koncentracijom i grozdovima dopanata. Proučavana su optička svojstva tankih filmova nitrida na safiru s ciljem određivanja promjene širine energetskog procjepa uslijed intenzivnog dopiranja.

Research programme and results:

The semiconductors of interest for applications in optoelectronics have been studied. Particular attention is concentrated on the nitride semiconductors (GaN, AlN, InGaN). Studies of the electrical transport in thin films is continued. Particularly important is the p-type doping since the magnesium is the only functional dopand. A new model is devised to explain the statistical properties of the Mg-acceptor. We use the model of the band of the states which is not a standard approach. Preliminary results show that only the band model can explain the wide scattering of the literature data for the Mg-ionization energy and the various degrees of activations. Further, the cathode-luminescence (CL) spectra of GaN doped with magnesium have been studied, and these results are correlated with the electrical measurements and statistical models. We have initiated the ERDA (Elastic Recoil Detection Analysis) i TOF (Time of Flight) studies of aluminum nitride (AlN) and GaN heavily doped with silicon or magnesium in order to evaluate the distribution of dopands and eventually detect the layer of the increased dopant concentrations. Optical properties of the nitride films have been measured and correlated to the shrinkage of the energy gap.

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PRILOZI
Znanstveni i pregledni radovi objavljeni u časopisima koji su indeksirani u Current Contents-u

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1.	Bermanec, Vladimir; Wegner, Reinhard; Kniewald, Goran; Rakvin, Boris; Palinkaš, Ladislav; Rajić, Maša; Tomašić, Nenad; Furić, Krešimir. The role of uranium(V) ion in the chemical composition of meta-autunite from pegmatites of Quintos de Baixo, Brazil. // Neues Jahrbuch für Mineralogie, Abhandlungen. 181 (2005) , 1 ; 27-38.
2.	Car, Tihomir; Radić, Nikola; Ivkov, Jovica; Tonejc, Antun. Resistivity models of the phase-transformation of amorphous Al78W22 thin films under isothermal and isochronal conditions. // Applied physics A : materials science and processing. 80 (2005) , 5; 1087-1092.
3.	Crnjak Orel, Zorica; Gaberšček, Miran; Turković, Aleksandra. Electrical and spectroscopic characterization of nanocrystalline V/Ce oxides. // Solar energy materials and solar cells. 86 (2005) ; 19-32.
4.	Desnica, Uroš; Dubček, Pavo; Salamon, Krešimir; Desnica-Franković, Ida-Dunja; Buljan, Maja; Bernstorff, Sigrid; Serincan, U.; Turan, Rasit. The evolution of the morphology of Ge nanocrystals formed by ion implantation in SiO2. // Nuclear instruments and methods in physics research. Section B, beam interactions with materials and atoms. 238 (2005) , 1-4; 272-275.
5.	Desnica-Franković, Ida-Dunja; Desnica, Uroš; Furić, Krešimir; Wagner, Joachim; Haynes, Tony. Hall effect and Raman analysis of residual damage and free electron concentration in Si-implanted GaAs: a quest for better doping efficiency. // Journal of physics and chemistry of solids. 66 (2005) , 7; 1158-116.
6.	Desnica-Franković, Ida-Dunja; Dubček, Pavo; Buljan, Maja; Furić, Krešimir; Desnica, Uroš; Bernstorff, Sigrid; Karl, Helmut; Grosshans, Ingo; Stritzker, Bern. Influence of stoichiometry deviations on properties of ion-beam synthesized CdSe QDs. // Nuclear instruments and methods in physics research. Section B, beam interactions with materials and atoms. 238 (2005) ; 302-305.
7.	Djerdj, Igor; Tonejc, Anđelka M.; Bijelić, Mirjana; Vraneša, Vladimir; Turković, Aleksandra. Transmission electron microscopy studies of nanostructured TiO2 films on different substrates. // Vacuum. 80 (2005) , 4; 371-378.
8.	Djerdj, Igor; Tonejc, Anđelka; Tonejc, Antun; Radić, Nikola. XRD line profile analysis of tungsten thin films. // Vacuum. 80 (2005) , 1-3; 151-158.
9.	Dubček, Pavo. Nanostructure as seen by the SAXS. // Vacuum. 80 (2005) ; 92-97.
10.		Furić, Krešimir; Mohaček Grošev, Vlasta; Hadžija, Mirko. Development of cataract caused by diabetes mellitus : Raman study. // Journal of molecular structure. 744-747C (2005) ; 169-177.
11.		Furić, Krešimir; Stoch, Leszek; Dutkiewicz, Jan. Raman study of TiO2 role in SiO2-Al2O3-MgO-TiO2-ZnO glass crystallization. // Spectrochimica acta A. 61 (2005) , 7; 1653-1659.
12.		Gajović, Andreja; Furić, Krešimir; Štefanić, Goran; Musić, Svetozar. In situ high temperature study of ZrO2 ball-milled to nanometre sizes. // Journal of molecular structure. 744-747 (2005) ; 127-133.
13.		Gajović, Andreja; Furić, Krešimir; Tomašić, Nenad; Popović, Stanko; Skoko, Željko; Musić, Svetozar. Mechanochemical preparation of nanocrystalline TiO2 powders and their behavior at high temperatures. // Journal of alloys and compounds. 398 (2005) , 1-2; 188-199.
14.		Gamulin, Ozren; Ivanda, Mile; Mitsa, Vladimir; Pašić, Selim; Balarin, Maja. Spectroscopy studies of structural phase transitions of chalcogenide glass thin films (Ge2S3)x(As2S3)1-x at coordination number 2.67. // Solid state communications. 135 (2005) ; 753-758.
15.		Gotić, Marijan; Musić, Svetozar; Ivanda, Mile; Šoufek, Marin; Popović, Stanko. Synthesis and characterisation of bismuth(III)-vanadate. // Journal of molecular structure. 744-747 (2005) ; 535-540.
16.		Gracin, Davor; Juraić, Krunoslav; Bogdanović Radović, Ivančica. Estimation of amorphous silicon thin films density by optical methods. // Vacuum. 80 (2005) , 1-3; 146-150.
17.		Gracin, Davor; Juraić, Krunoslav; Dubček, Pavo; Gajović, Andreja; Bernstorff, Sigrid. Analysis of the nano-structural properties of thin film Silicon-Carbon alloys. // Vacuum. 80 (2005) , 1-3; 98-101.
18.		Kovačević, Ivana; Dubček, Pavo; Zorc, Hrvoje; Radić, Nikola; Pivac, Branko; Bernstorff, Sigrid. GISAXS characterization of Ge islands on Si (100) substrates. // Vacuum. 80 (2005) , 1-3; 69-73.
19.		Kovačević, Ivana; Markevich, V.P.; Hawkins, I.D.; Pivac, Branko; Peaker, A.R. Vacancy-related complexes in neutron-irradiated silicon. // Journal of physics. Condensed matter. 17 (2005) ; S2229-S2235.
20.		Kovačević, Ivana; Pivac, Branko. Defects production in gamma irradiated silicon at different temperatures. // Vacuum. 80 (2005) , 1-3; 223-228.
21.		Kozarac, Zlatica; Risović, Dubravko; Frka, Sanja; Möbius, Dietmar. Reflection of light from the air/water interface covered with sea-surface microlayers. // Marine chemistry. 96 (2005) , 1-2; 99-113.
22.		Lučić Lavčević, Magdy; Dubček, Pavo; Crnjak Orel, Zorica; Turković, Aleksandra. GISAXS view of vanadium cerium oxide thin films and influence of lithium intercalation. // Journal of chemical information and modeling. 45(6) (2005) ; 1553-1557.
23.		Lugomer, Stjepan; Fukumoto, Yasuhide. Hierarchical instability of a vortex ring array in multipulse laser-matter interactions. // Fluid dynamics research. 36 (2005) , 4-6; 277-290.
24.		Lugomer, Stjepan; Mihaljević, Branka; Peto, Gabor; Toth, Attila; Horvath, Eniko. Sponge-like metal surface generated by laser in the semiconfined configuration. // Journal of applied physics. 97 (2005) , 7(0733); 5-13.
25.		Lugomer, Stjepan; Zabusky, J. Norman. Nonlinear and breaking micron waves at the edge of laser-liquefied metal pool. // Applied physics letters. 87 (2005) , 2; 204101-204103.
26.		Makreski, Petre; Jovanovski, Gligor; Gajović, Andreja. Minerals from Macedonia XVII. Vibrational spectra of some common appearing amphiboles. // Vibrational spectroscopy. 40 (2005) ; 98-109.
27.		Moguš-Milanković, Andrea; Šantić, Ana; Ličina, Vesna; Day, Delbert E. Dielectric behaviour and impedance spectroscopy of bismuth iron phosphate glasses. // Journal of non-crystalline solids. 351 (2005) , 40-42; 3235-3245.
28.		Moguš-Milanković, Andrea; Šantić, Ana; Reis, Signo T.; Furić, Krešimir; Day, Delbert E. Studies of lead-iron phosphate glasses by Raman, Mossbauer and Impedance spectroscopy. // Journal of non-crystalline solids. 351 (2005) , 40-42; 3246-3258.
29.		Mohaček Grošev, Vlasta. Spectroscopic arguments for a new crystal phase of glycolaldehyde. // Journal of Raman spectroscopy. 36 (2005) ; 453-461.
30.		Mohaček Grošev, Vlasta. Vibrational analysis of hydroxyacetone. // Spectrochimica acta A. 61 (2005) ; 477-484.
31.		Musić, Svetozar; Dragčević, Đurđica; Popović, Stanko; Ivanda, Mile. Precipitation of ZnO particles and their properties. // Materials letters. 59 (2005) ; 2388-2393.
32.		Pucić, Irina; Turković, Aleksandra. Radiation modification of (PEO)8ZnCl2 polyelectrolte and nanocomposite. // Solid state ionics. 176 (2005) ; 1797-1800.
33.		Radić, Nikola; Pivac, Branko; Meinardi, Franco; Koch, Th. Raman study of carbon clusters in W-C thin films. // Materials science and engineering. A, structural materials: properties, microstructure and processing. 396 (2005) , 1-2; 290-295.
34.		Risović, Dubravko; Furić, Krešimir. Comparison of Raman spectroscopy methods for determination of super-cooled and liquid water temperature. // Journal of Raman spectroscopy. 36 (2005) ; 771-776.
35.		Ristić, Mira; Musić, Svetozar; Ivanda, Mile; Popović, Stanko. Sol-gel synthesis and characterization of nanocrystalline ZnO powders. // Journal of alloys and compounds. 397 (2005) , 1-2; L1-L4.
36.		Štefanić, Goran; Musić, Svetozar; Gajović, Andreja. Thermal behavior of the amorphous precursors of the ZrO2-CrO1.5 system. // Journal of molecular structure. 744 (2005) ; 541-549.
37.		Švrček, V.; Rehspringer, J.L.; Slaoui, A.; Pivac, Branko; Muller, J.-C. Clustering/declustering of silicon nanocrystals in spin-on glass solutions. // Semiconductor science and technology. 20 (2005) ; 314-319.
38.		Turković, Aleksandra; Crnjak Orel, Zorica; Fox, Nikola Dean. Vibrational study of the crystalline phases in (PEO(8)ZnCl2 nanocomposite electrolyte. // Vacuum. 80 (2005) , 1-3; 208-212.
39.		Turković, Aleksandra; Dubček, Pavo; Fox, Nikola Dean. Self-organization of nanoparticles in TiO2 thin film on the glass substrate. // Vacuum. 80 (2005) , 1-3; 108-112.
40.		Zabusky, Norman; Lugomer, Stjepan; Zhang, Shuang. Micro-fluid dynamics via laser metal surface interactions: wave vortex interpretation of emerging multiscale coherent structures. // Fluid dynamics research. 36 (2005) , 4-6; 291-299.

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