Autor: Dunal, Rafał - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Characterisation of a graphene/NPB structure with Re2O7 as an interfacial layer for OLED application
Autorzy:: Krukowski, Paweł
Piskorski, Michał
Rogala, Maciej
Dąbrowski, Paweł
Lutsyk, Iaroslav
Kozłowski, Witold
Kowalczyk, Dorota Anna
Krempiński, Patryk
Ster, Maxime Le
Nadolska, Aleksandra
Toczek, Klaudia
Przybysz, Przemysław
Dunal, Rafał
Ryś, Wojciech
Sarkar, Shankhanil
Łuszczyńska, Beata
Kowalczyk, Paweł J.
Tematy:: graphene
rhenium oxide
NPB
anode; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Powiązania:: https://bibliotekanauki.pl/articles/59112903.pdf Link otwiera się w nowym oknie
Opis:: A graphene/NPB structure with Re₂O₇ as an interfacial layer in the context of its potential use in the design of an organic light-emitting diode (OLED) is investigated. The X-ray photoelectron spectroscopy (XPS) study shows the formation of the Re₂O₇ phase on a monolayer graphene on quartz during thermal deposition in ultra-high vacuum (UHV). The ultraviolet photoelectron spectroscopy (UPS) study shows an enhancement of the work function of the graphene heterostructure after deposition of the Re₂O₇ layer up to 5.4 eV. The hole injection barrier between the Re₂O₇/graphene heterostructure and the N-bis-(1- naphthyl)-N,N-diphenyl-(1,1-biphenyl)-4,4-diamine (NPB) layer was estimated to be 0.35 eV, which is very promising for a good OLED performance.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Graphene on quartz modified with rhenium oxide as a semitransparent electrode for organic electronics
Autorzy:: Krukowski, Paweł
Piskorski, Michał
Udovytska, Ruslana
Kowalczyk, Dorota A.
Lutsyk, Iaroslav
Rogala, Maciej
Dąbrowski, Paweł
Kozłowski, Witold
Łuszczyńska, Beata
Jung, Jarosław
Ulański, Jacek
Matuszek, Krzysztof
Nadolska, Aleksandra
Przybysz, Przemysław
Ryś, Wojciech
Toczek, Klaudia
Dunal, Rafał
Krempiński, Patryk
Czerwińska, Justyna
Ster, Maxime Le
Skulimowski, Marcin
Kowalczyk, Paweł J.
Tematy:: graphene
rhenium oxide
anode
organic light-emitting diode; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Powiązania:: https://bibliotekanauki.pl/articles/2174856.pdf Link otwiera się w nowym oknie
Opis:: The presented research shows that commercially available graphene on quartz modified with rhenium oxide meets the requirements for its use as a conductive and transparent anode in optoelectronic devices. The cluster growth of rhenium oxide enables an increase in the work function of graphene by 1.3 eV up to 5.2 eV, which guarantees an appropriate adjustment to the energy levels of organic semiconductors used in organic light-emitting diode devices.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Influence of structural defects on charge density waves in 1T-TaS$_{2}$
Autorzy:: Piskorski, Michal
Kowalczyk, Dorota A.
Gmitra, Martin
Nadolska, Aleksandra
Chiang, Tai-Chang
Kowalczyk, Pawel J.
Kołodziej, Jacek
Le Ster, Maxime
Dunal, Rafal
Wysmolek, Andrzej
Toczek, Klaudia
Kozlowski, Witold
Hattori, Takuma
Binder, Johannes
Olszowska, Natalia
Kuwahara, Yuji
Lutsyk, Iaroslav
Krukowski, Pawel
Lacinska, Ewa
Rys, Wojciech
Przybysz, Przemyslaw
Bian, Guang
Szalowki, Karol
Dabrowski, Pawel
Rogala, Maciej
Opis:: The influence of intrinsic defects of 1T-TaS$_{2}$ on charge density waves (CDWs) is studied using scanning tunneling microscopy and spectroscopy (STM, STS), angle-resolved photoelectron spectroscopy (ARPES), and density functional theory (DFT). We identify several types of structural defects and find that most have a local character limited to a single CDW site, with a single exception which effectively behaves as a dopant, leading to band-bending and affecting multiple neighboring sites. While only one type of defect can be observed by STM topographic imaging, all defects are easily resolved in STS mapping. Our results indicate modulation of the Mott band gap commensurate with the CDW and breaking of the three-fold symmetry of electronic states. DFT calculations (with included Coulomb interactions) are used to investigate the electronic structure, focusing on both sulfur vacancy and oxygen-sulfur substitution. The sulfur vacancy system, characterized with a metallic behavior, is identified as the origin of one of the experimentally observed defects. Additionally, the effect of oxidation of 1T-TaS$_{2}$ depends on the substitution site, leading to the heterogeneity of electronic properties.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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