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1.
Stability of interfaces between Bi2Se3 topological insulator and metals
Matjaž Valant, Sandra Gardonio, Mattia Fanetti, 2025, published scientific conference contribution abstract (invited lecture)

Keywords: topološki izolatorji, elektrode, stične ravnine
Published in RUNG: 17.03.2025; Views: 486; Downloads: 1
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2.
The role of fluorine-functionalized organic spacers for defect passivation and low-dimensional phase formation in 3D MAPI perovskite solar cells
Ali Semerci, Javier Urieta-Mora, Sander Driessen, Ali Buyruk, Rik Hooijer, Agustín Molina-Ontoria, Bülent Alkan, Seckin Akin, Mattia Fanetti, Saim Emin, 2025, original scientific article

Abstract: Widespread application of organic-inorganic halide perovskites (OIHP) still faces a major obstacle in mitigating moisture-induced degradation. Integrating organic spacers, as defect passivation facilitators along with low-dimensional phase (LDP) formation is an effective approach to enhance the efficiency and robustness of 3D methyl ammonium lead iodide (MAPI) in photovoltaics (PV). Here, the formamidinium cation (FA+) employing 3,5-difluorobenzene-1-carboximidamidium iodide (2F), 4-(trifluoromethyl)benzene-1-carboximidamidium iodide (3F), and 2,3,4,5,6-pentafluorobenzene-1-carboximidamidium iodide (5F) organic spacers as passivation layer in 3D/LDP OIHP solar cells is utilized. Fluorine atom position and quantity in organic spacers change the optoelectronic characteristics of the perovskites, enhancing hydrophobicity, facilitating LDP formation, and augmenting dipole moments, thereby facilitating charge separation processes. PV performance analysis reveals that 3F-treated 3D/LDP devices achieve the highest efficiency of 19.22%. Experimental results and density functional theory (DFT) studies attribute the higher performance of 3F-modified devices to effective LDP formation, enhanced passivation of defect states at perovskite surfaces and grain boundaries, the highest dipole moment and lowest band gap among the evaluated spacers. The stability tests show that, after 1000 h, 3F- and 5F-modified 3D/LDP OIHP devices retain over 85% of their initial efficiency. This research opens novel avenues for designing appropriate organic spacers to attenuate defects in 3D/LDP PV devices.
Keywords: fluorine-functionalized molecules, MAPI perovskite solar cells, deffect passivation
Published in RUNG: 20.02.2025; Views: 715; Downloads: 4
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3.
The interface between Pt and ▫$Bi_2Se_3$▫ : instability and formation of a new ordered phase
Mattia Fanetti, Katja Ferfolja, Sandra Gardonio, Matjaž Valant, 2024, original scientific article

Keywords: topological insulator, platinum, interface, thin film, TEM, intermetallic
Published in RUNG: 28.01.2025; Views: 771; Downloads: 5
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4.
Scienza senza confini : l'ǂesempio dei profitaliani nell'ateneo di Nova Gorica
2024, interview

Published in RUNG: 05.12.2024; Views: 906; Downloads: 4
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Synthesis and optical properties of Cr-doped ▫$Bi2_Se_3$▫ topological insulator nanoplatelets
Blaž Belec, Thanveer Thajudheen, Sandra Gardonio, Mattia Fanetti, Matjaž Valant, 2024, published scientific conference contribution abstract

Keywords: topological insulators, optical properties, synthesis
Published in RUNG: 30.09.2024; Views: 1066; Downloads: 2
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Unveiling cathodoluminescence in ▫$Bi_2Se_3$▫ : a plasmonic signature?
Thanveer Thajudheen, Blaž Belec, Mattia Fanetti, Matjaž Valant, 2024, published scientific conference contribution abstract

Keywords: cathodoluminescence, optical properties, topological insulators
Published in RUNG: 12.06.2024; Views: 1569; Downloads: 3
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10.
From electrons to emission : exploring cathodoluminescence for advanced material characterization
Blaž Belec, Thanveer Thajudheen, Mattia Fanetti, 2024, published scientific conference contribution abstract (invited lecture)

Keywords: cathodoluminescence, optical properties, topological insulators
Published in RUNG: 12.06.2024; Views: 1661; Downloads: 3
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