Search Results - "Patru, Roxana"

Tetragonal–Cubic Phase Transition and Low-Field Dielectric Properties of CH3NH3PbI3 Crystals by Patru, Roxana, Khassaf, Hamidreza, Pasuk, Iuliana, Botea, Mihaela, Trupina, Lucian, Ganea, Constantin-Paul, Pintilie, Lucian, Pintilie, Ioana

“…The frequency and temperature dependence of dielectric properties of CH3NH3PbI3 (MAPI) crystals have been studied and analyzed in connection with…”
Get full text

Enhancing stability of hybrid perovskite solar cells by imidazolium incorporation by Gabriel Tomulescu, Andrei, Nicoleta Leonat, Lucia, Neațu, Florentina, Stancu, Viorica, Toma, Vasilica, Derbali, Sarah, Neațu, Ștefan, Mihai Rostas, Arpad, Beșleagă, Cristina, Pătru, Roxana, Pintilie, Ioana, Florea, Mihaela

“…Hybrid perovskites based solar cells have demonstrated high conversion efficiency but poor long-term stability. This study reports on the results obtained…”
Get full text

Structural, functional properties and enhanced thermal stability of bulk graded (Ba,Sr)TiO3 structures obtained by spark plasma sintering by Botea, Mihaela, Pintilie, Ioana, Surdu, Vasile-Adrian, Stanciu, Cătălina-Andreea, Truşcă, Roxana-Doina, Vasile, Bogdan Ştefan, Patru, Roxana, Ianculescu, Adelina-Carmen, Pintilie, Lucian

“…Graded structures with different architectures were obtained by spark plasma sintering from (Ba1-xSrx)TiO3 (BST, x = 0.10; 0.20; 0.30) powders. The presence of…”
Get full text

Corrigendum to “Structural, functional properties and enhanced thermal stability of bulk graded (Ba,Sr)TiO3 structures obtained by spark plasma sintering” [J Mater Res Technol vol. 12 (2021) 2085–2103] by Botea, Mihaela, Pintilie, Ioana, Surdu, Vasile-Adrian, Stanciu, Cătălina-Andreea, Truşcă, Roxana-Doina, Vasile, Bogdan Ştefan, Patru, Roxana, Udrea, Mircea, Ianculescu, Adelina-Carmen, Pintilie, Lucian

Get full text

Influence of Grain Size on Dielectric Behavior in Lead-Free 0.5 Ba(Zr0.2Ti0.8)O3–0.5 (Ba0.7Ca0.3)TiO3 Ceramics by Ene, Vladimir Lucian, Lupu, Valentin Razvan, Condor, Claudiu Vasile, Patru, Roxana Elena, Hrib, Luminita Mirela, Amarande, Luminita, Nicoara, Adrian Ionut, Pintilie, Lucian, Ianculescu, Adelina-Carmen

“…Fine-tuning of grain sizes can significantly influence the interaction between different dielectric phenomena, allowing the development of materials with…”
Get full text

Grain size-driven effect on the functional properties in Ba0.6Sr0.4TiO3 ceramics consolidated by spark plasma sintering by Pătru, Roxana-Elena, Stanciu, Cătălina Andreea, Soare, Elena Mirabela, Surdu, Vasile-Adrian, Truşcă, Roxana Doina, Nicoară, Adrian Ionuţ, Vasile, Bogdan Ştefan, Boni, Georgia, Amarande, Luminiţa, Horchidan, Nadejda, Curecheriu, Lavinia Petronela, Mitoşeriu, Liliana, Pintilie, Lucian, Pintilie, Ioana, Ianculescu, Adelina-Carmen

“…Dense fine-grained Ba0.6Sr0.4TiO3 ceramics with submicronic grains sizes (GS) have been prepared using nanopowders synthesized via sol-gel route and…”
Get full text

High-Entropy Lead-Free Perovskite Bi0.2K0.2Ba0.2Sr0.2Ca0.2TiO3 Powders and Related Ceramics: Synthesis, Processing, and Electrical Properties by Surdu, Vasile-Adrian, Marinică, Mariana-Andreea, Pătru, Roxana-Elena, Oprea, Ovidiu-Cristian, Nicoară, Adrian Ionuț, Vasile, Bogdan Ștefan, Trușca, Roxana, Ianculescu, Adelina-Carmen

“…A novel high-entropy perovskite powder with the composition Bi0.2K0.2Ba0.2Sr0.2Ca0.2TiO3 was successfully synthesized using a modified Pechini method. The…”
Get full text

Effect of transition metal ions on the dielectric properties of chromium potassium phosphates by Mighri, Zaineb, Patru, Roxana Elena, Leonat, Lucia Nicoleta, El Khouja, Outman, Nasri, Habib, Rostas, Arpad Mihai, Galca, Aurelian Catalin

“…Potassium ions are important for developing electrode materials because they have similar properties to lithium and sodium ions. Mixed chromium phosphates…”
Get full text

Structural and Electrical Properties of Novel Cr/Fe Mixed Transition-Metal Phosphates by Mighri, Zaineb, Souiwa, Khalifa, Rostas, Arpad Mihai, Patru, Roxana Elena, Bocirnea, Amelia Elena, Iacob, Nicusor, Kuncser, Victor, El Khouja, Outman, Leonat, Lucia Nicoleta, Hidouri, Mourad, Nasri, Habib, Galca, Aurelian Catalin

“…The phosphate KCoCr­(PO4)2 and iron-substituted variants KCoCr1–x Fe x (PO4)2 (x = 0.25, 0.5, and 0.75) were synthesized by a solid-state reaction route, while…”
Get full text

(Ba,Sr)TiO3 solid solutions sintered from sol-gel derived powders: An insight into the composition and temperature dependent dielectric behavior by Patru, Roxana Elena, Ganea, Constantin Paul, Stanciu, Catalina-Andreea, Surdu, Vasile-Adrian, Trusca, Roxana, Ianculescu, Adelina-Carmen, Pintilie, Ioana, Pintilie, Lucian

“…Single-phase Ba1-xSrxTiO3 (BST) perovskite ceramics with 0.3 ≤ x ≤ 0.4 were prepared from powders synthesized via sol-gel route. The compositions have the…”
Get full text

Influence of Grain Size on Dielectric Behavior in Lead-Free 0.5 BaTiO[sub.3] Ceramics by Ene, Vladimir Lucian, Lupu, Valentin Razvan, Condor, Claudiu Vasile, Patru, Roxana Elena, Hrib, Luminita Mirela, Amarande, Luminita, Nicoara, Adrian Ionut, Pintilie, Lucian, Ianculescu, Adelina-Carmen

“…Fine-tuning of grain sizes can significantly influence the interaction between different dielectric phenomena, allowing the development of materials with…”
Get full text

Negative Capacitance and Switching Dynamics Control Via Non-Ferroelectric Elements by Boni, Andra Georgia, Patru, Roxana, Filip, Lucian D, Chirila, Cristina, Pasuk, Iuliana, Pintilie, Ioana, Pintilie, Lucian

“…Complex ferroelectric structures with dielectric inter-layers may become possible alternatives for neuromorphic computing and low-power field-effect…”
Get full text

Impact of interface defects on the band alignment and performance of TiO$_2$/MAPI/Cu$_2$O perovskite solar cells by Filipoiu, Nicolae, Cuzminschi, Marina, Pantis-Simut, Calin-Andrei, Torfason, Kristinn, Brophy, Rachel Elizabeth, Manolescu, Andrei, Patru, Roxana E, Besleaga, Cristina, Stan, George E, Pintilie, Ioana, Nemnes, George Alexandru

“…Optimizing the interfaces in perovskite solar cells (PSCs) is essential for enhancing their performance, improving their stability, and making them…”
Get full text

Capacitive and inductive effects in perovskite solar cells: the different roles of ionic current and ionic charge accumulation by Filipoiu, Nicolae, Preda, Amanda Teodora, Anghel, Dragos Victor, Patru, Roxana, Brophy, Rachel Elizabeth, Kateb, Movaffaq, Besleaga, Cristina, Tomulescu, Andrei Gabriel, Pintilie, Ioana, Manolescu, Andrei, Nemnes, George Alexandru

“…Phys. Rev. Applied 18, 064087 (2022) Dynamic hysteresis effects have been long known to occur in the J-V characteristics of perovskite solar cells (PSCs), with…”
Get full text

High-Entropy Lead-Free Perovskite Bi[sub.0.2]K[sub.0.2]Ba[sub.0.2]Sr[sub.0.2]Ca[sub.0.2]TiO[sub.3] Powders and Related Ceramics: Synthesis, Processing, and Electrical Properties by Surdu, Vasile-Adrian, Marinică, Mariana-Andreea, Pătru, Roxana-Elena, Oprea, Ovidiu-Cristian, Nicoară, Adrian Ionuț, Vasile, Bogdan Ștefan, Trușca, Roxana, Ianculescu, Adelina-Carmen

“…A novel high-entropy perovskite powder with the composition Bi[sub.0.2] K[sub.0.2] Ba[sub.0.2] Sr[sub.0.2] Ca[sub.0.2] TiO[sub.3] was successfully synthesized…”
Get full text