Published articles

All articles published by 5GSOLAR staff are listed below.


1. Juneja, N.; Daskeviciute-Geguziene, S.; Spalatu, N.; Mandati, S.; Katerski, A.; Grzibovskis, R.; Vembris, A.; Karazhanov, S.; Getautis, V.; Krunks, M.; Oja Acik, I. (2024). Employment of dopant-free fluorene-based enamines as innovative hole transport materials to boost the transparency and performance of Sb2S3 based solar cells. Materials Science in Semiconductor Processing, 169, #107934


1. Krautmann, R.; Spalatu, N.; Josepson, R.; Nedzinskas, R. S.; Kondrotas, R.; Grzibovskis, R.; Vembris, A.; Krunks, M.; Oja Acik, I. (2023). Low processing temperatures explored in Sb2S3 solar cells by close-spaced sublimation and analysis of bulk and interface related defects. Solar Energy Materials and Solar Cells, 251

2. Oluwabi, T. A.; Spalatu, N.; Maticiuc, N.; Katerski, A.; Mere, A.; Krunks, M.; Oja Acik, I. (2023). Combinative solution processing and Li doping approach to develop p-type NiO thin films with enhanced electrical properties. Frontiers in Materials, 10, 1−12

3. Koltsov, M.; Gopi, S.V.; Raadik, T.; Krustok, J.; Josepson, R.; Gržibovskis, R.; Vembris, A.; Spalatu, N. (2023). Development of Bi2S3 thin film solar cells by close-spaced sublimation and analysis of absorber bulk defects via in-depth photoluminescence analysis. Solar Energy Materials and Solar Cells, 254, #112292

4. Mandati, S.; Juneja, N.; Katerski, A.; Jegorove, A.; Grzibovskis, R.; Vembris, A.; Dedova, T.; Spalatu, N.; Magomedov, A.; Karazhanov, S.; Getautis, V.; Krunks, M.; Oja Acik, I. (2023). 4.9 % efficient Sb2S3 solar cells from semi-transparent absorbers with fluorene-based thiophene terminated hole conductors. ACS Applied Energy Materials, 6 (7), 3822−3933

5. Vadakkedath Gopi S.; Spalatu N.; Basnayaka M.; Krautmann R.;, Katerski A.; Josepson R.; Grzibovskis R.; Vembris A.; Krunks M. and Oja Acik I. (2023). Post deposition annealing effect on properties of CdS films and its impact on CdS/Sb2Se3 solar cells performance. Front. Energy Res 11:1162576

6. Eensalu, J. S.; Mandati, S.; Don, C. H.; Finch, H.; Dhanak, V. R.; Major, J. D.; Grzibovskis, R.; Tamm, A.; Ritslaid, P.; Josepson, R.; Käämbre, T.; Vembris, A.; Spalatu, N.; Krunks, M.; Oja Acik, I. (2023). Sb2S3 thin-film solar cells fabricated from an antimony ethyl xanthate based precursor in air. ACS Applied Materials & Interfaces, 15 (36),  42622−42636


1. G. Hector, J.S. Eensalu, A. Katerski, H. Roussel, O. Chaix-Pluchery, E. Appert, F. Donatini, I. Oja Acik, E. Kärber, V. Consonni. (2022). Optimization of the Sb2S3 Shell Thickness in ZnO Nanowire-Based Extremely Thin Absorber Solar Cells. Nanomaterials, 12

2. J.S. Eensalu, K. Tõnsuaadu, I. Oja Acik, M. Krunks. (2022). Sb2S3 thin films by ultrasonic spray pyrolysis of antimony ethyl xanthate. Materials Science in Semiconductor Processing, Volume 137

3. M. Koltsov, R. Krautmann, A. Katerski, N. Maticiuc, M. Krunks, I. Oja Acik, N. Spalatu. (2022). A post-deposition annealing approach for organic residues control in TiO2 and its impact on Sb2Se3/TiO2 device performanceFaraday Discussions

4. N. Juneja, S. Mandati, A. Katerski, N. Spalatu, S. Daskeviciute, A. Vembris, S. Karazhanov, V. Getautis, M. Krunks, I. Oja Acik. (2022). Sb2S3 Solar Cells with Cost-effective and Dopant-free Fluorene-based Enamine as Hole Transport Material. Sustainable Energy & Fuels, 6, 3220

5. Z. Chen, T. Dedova, N. Spalatu, N. Maticiuc, M. Rusu, A. Katerski, I. Oja Acik, T. Unold, M. Krunks. (2022). ZnO/NiO heterostructures with enhanced photocatalytic activity obtained by ultrasonic spraying of a NiO shell onto ZnO nanorods. Colloids and Surfaces A: Physicochemical and Engineering Aspects V.648, #129366

6. T. Olukan, J. Sydorenko, A. Katerski, M. Al Mahriu, C.-Y. Lai, A. Al-Hagri, S. Santos, M. Chiesa. (2022). Insights intro TiO2 thin film photodegradation from Kelvin Probe AFM maps. Appl. Phys. Lett. 121, 031901

7. T. Dittrich, J. Sydorenko, N. Spalatu, N. Nickel, A. Mere, M. Krunks, I. Oja Acik. (2022). Synthesis control of charge separation at anatase TiO2 thin films studied by transient surface photovoltage spectroscopy. ASC Appl. Mater. Interfaces 121, 031901

8. T. Raadik, N. Spalatu, J. Krustok, R. Jospeson, M. Grossberg. (2022). Temperature dependent optical and electrical characterization of SnS/CdS solar cell. Thin Solid Films, 743, 139069

9. J. Sydorenko, A. Mere, M. Krunks, M. Krichevskaya, I. Oja Acik. (2022). Transparent TiO2 thin films with high photocatalytic activity for indoor air purification. RSC Advances, 12 (55), 35531−35542


1. Z. Chen, T. Dedova, I. Oja Acik, M. Danilson, M. Krunks. Nickel oxide films by chemical spray: Effect of deposition temperature and solvent type on structural, optical, and surface properties. Applied Surface Science, 548 (2021)

2. J. Montero, T. Welearegay, J. Thyr, H. Stopfel, T. Dedova, I. Oja Acik, L. Österlund. Copper–zinc oxide heterojunction catalysts exhibiting enhanced photocatalytic activity prepared by a hybrid deposition method. RSC Advances, 11 (17) (2021)

3. N. Spalatu, R. Krautmann, A. Katerski, E. Kärber, R. Josepson, J. Hiie, I. Oja Acik, M. Krunks. Screening and optimization of processing temperature for Sb2Se3 thin film growth protocol: Interrelation between grain structure, interface intermixing and solar cell performance. Solar Energy Materials and Solar Cells, 225 (2021)

4. R. Krautmann, N. Spalatu, R. Gunder, D. Abou-Ras, T. Unold, S. Schorr, M. Krunks, I. Oja Acik. Analysis of grain orientation and defects in Sb2Se3 solar cells fabricated by close-spaced sublimation. Solar Energy, 225 (2021)

5. J.S. Eensalu, K. Tõnsuaadu, J. Adamson, I. Oja Acik, M. Krunks.  Thermal decomposition of tris(O-ethyldithiocarbonato)-antimony(III) — a single source precursor for antimony sulfide thin films. Journal of Thermal Analysis and Calorimetry (2021)

6. P. Gaffuri, T. Dedova, E. Appert, M. Danilson, A. Baillard, O. Chaix-Pluchery, F. Güell, I. Oja-Acik, V. Consonni, V. Enhanced photocatalytic activity of chemically deposited ZnO nanowires using doping and annealing strategies for water remediation. Applied Surface Science (2021)


1. A.T. Oluwabi, D. Gaspar, A. Katerski, A. Mere, M. Krunks, L. Pereira, I. Oja Acik. Influence of post-UV/Ozone treatment of Ultrasonic-Sprayed Zirconium Oxide Dielectric Films for a Low-Temperature Oxide Thin Film Transistor. Materials 13 (2020)

2. A.T. Oluwabi, A. Katerski, E. Carlos, R. Branquinho, A. Mere, M. Krunks, E. Fortunato, L. Pereira, I. Oja Acik. Application of ultrasonic sprayed zirconium oxide dielectric in zinc tin oxide-based thin film transistor. Journal of Materials Chemistry C.  (2020)

3. T. Dedova, I. Oja Acik, Z. Chen, A. Katerski, K. Balmassov, I. Gromõko, T. Nagyné-Kovács, I.M. Szilágy, M. Krunks. Enhanced Photocatalytic Activity of ZnO Nanorods by Surface Treatment with HAuCl4: Synergic Effects Through an Electron Scavenging, Plasmon Resonance and Surface Hydroxylation. Materials Chemistry and Physics (2020)

4. I. Dundar, A. Mere, V. Mikli, M. Krunks, I. Oja Acik. Thickness Effect on Photocatalytic Activity of TiO2 Thin Films Fabricated by Ultrasonic Spray Pyrolysis. Catalysts, Issue 9 (2020)

5. J. Spiridonova, A. Mere, M. Krunks, M. Rosenberg, A. Kahru, M. Danilson, M. Krichevskaya, I. Oja Acik. Enhanced Visible and Ultraviolet Light-Induced Gas-Phase Photocatalytic Activity of TiO2 Thin Films Modified by Increased Amount of Acetylacetone in Precursor Solution for Spray Pyrolysis. Catalysts, Issue 9 (2020)

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