Engineering of glass formation and photoinduced property modification of hybrid amorphous chalcogenides via controlled content of lone-pair electrons
Provider: Grantová agentura ČR
Programme: Mezinárodní projekty
Implementation period: 01.01.20 - 31.05.22
Workplace:
Fakulta chemicko-technologická - CEMNAT
Investigator: Krbal MilošTeam member: Wágner Tomáš | Frumarová Božena | Svoboda Roman | Mistrík Jan | Přikryl Jan
Description:
Amorphous chalcogenide are widely used in science and technology, for example in fiber and integrated optics, as superhigh resolution resists, and also in nonvolatile memory cells, such as the recently commercialized by Intel Optane. One of the parameters characterizing the ability of a material for glass formation is the presence of lone-pair electrons, i.e. paired p-electrons that do not directly participate in the formation of covalent bonds but which are located close to the top of the valence band and determine the properties of the materials including the stability of its structure. Classic chalcogenide glasses are very good glass-formers and possess a high concentration of lone pair electrons. At the same time, in a different classes of chalcogenides ? transition-metal dichalkogenides ? lone pair electrons are absent. The aim of the proposed project is the creation of hybrid amorphous chalcogenides, based on chalcogenide glasses, doped with transition metals, which will allow us to control the concentration of lone pair electrons.
Amorphous chalcogenide are widely used in science and technology, for example in fiber and integrated optics, as superhigh resolution resists, and also in nonvolatile memory cells, such as the recently commercialized by Intel Optane. One of the parameters characterizing the ability of a material for glass formation is the presence of lone-pair electrons, i.e. paired p-electrons that do not directly participate in the formation of covalent bonds but which are located close to the top of the valence band and determine the properties of the materials including the stability of its structure. Classic chalcogenide glasses are very good glass-formers and possess a high concentration of lone pair electrons. At the same time, in a different classes of chalcogenides ? transition-metal dichalkogenides ? lone pair electrons are absent. The aim of the proposed project is the creation of hybrid amorphous chalcogenides, based on chalcogenide glasses, doped with transition metals, which will allow us to control the concentration of lone pair electrons.
