| Topic title |
Possible scientific supervisors |
Source of funding |
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Synthesis and properties of electroactive materials for organic light emitting diodes
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prof. dr. Saulius GRIGALEVIČIUS |
state-funded |
Research Topic Summary.
Recent advances in organic optoelectronics, particularly in efficient organic light-emitting devices (OLED), have called for new electro-active organic materials as well as for new device technologies. Small OLED-based displays already generate hundreds of millions of dollars. Larger OLED displays will penetrate the television market in the not-too-distant future. Nowadays white displays play important role in lightening. Further advances of these devices substantially rely on development and studying of high-performance organic charge-transport and host materials, theoretical understanding of charge and energy transport in the organic systems and their well-balanced application in phosphorescent and thermally activated delayed fluorescence (TADF) devices. The aim of this project is to synthesize several groups of polymeric, dendrimeric or branched wide band gap derivatives, which would serve as thermally stable host materials or TADF emitters for organic light emitting diodes. In order to optimize efficiencies of the devices, several groups of new hole transporting materials, which are used as additional charge injecting/ transporting layers, will be also synthesized in the frame of this project.
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| Design, synthesis of new heterocyclic amino acid derivatives and investigation of structure and properties |
doc. dr. Vilija Kederienė |
state-funded |
| Synthesis and investigation of azoles and azines |
prof. habil. dr. Vytautas MICKEVIČIUS |
state-funded |
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Synthesis, investigation and application of organic compounds exhibitting TADF effect
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dr. Dalius GUDEIKA |
state-funded |
Research Topic Summary.
Organic electronics is attractive due to the potentially of cheap production, environmental friendliness and material flexibility. Organic synthesis methods allow changing of chemical and physical properties of substances in wide ranges.
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Studies of self-assembling biopolymeric amphiphiles and their properties
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doc. dr. Ramunė RUTKAITĖ |
state-funded |
Research Topic Summary.
Numerous approaches have been developed for the self-assembly of natural or synthetic amphiphiles into soft core-shell nano- or microobjects which are of great interest in various fields. Among these amphiphilic molecules, amphiphiles containing natural blocks, such as polysaccharides, have attracted the most attention because they are non-toxic, non-immunogenic, biocompatible, biodegradable, and renewable. Polysaccharide based amphiphilic copolymers might represent a new class of biopolymeric materials with potential applications in different fields such as plastic industry, detergency, and also as the pharmaceutics where the design of nano or microdevices carrying a polysaccharide chains can be also of interest for therapy, vaccination and diagnostic purposes. The aim of this research work – to obtain various modified polysaccharide structures having both hydrophilic and lipophilic groups and to explore their properties in the light of different potential applications. During the course of the project chemical and physical modification of natural polysaccharides will be performed to obtain the derivatives of different structure, amphiphilicity, charge density (either neutral or charged), molecular weight etc. The self-aggregation behavior of obtained amphiphilic polysaccharides in water via formation of various structures e.g. hydrogel nanoparticles, micelles, polymersomes, oil in water emulsions etc. as well as their properties will be also assessed. The developed materials will be also tested in some applications such as controlled delivery of target compounds via stimuli responses e.g. pH, temperature, enzyme-degradation etc.
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Synthesis and investigation of hole transporting organic molecules for hybrid solar cells
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prof. dr. Vytautas GETAUTIS |
state-funded |
Research Topic Summary.
Past few years have witnessed rapid development in the hybrid solar cells. Record efficiencies of photovoltaic devices exceeding 25% have been reported and certified. In these cells, the hole transporting material (HTM) is one of the key components, which transport photo-generated holes to contact. The HTM should exhibit high enough hole mobility, suitable highest occupied molecular orbitals (HOMO) and lowest unoccupied molecular orbitals (LUMO) energy levels. The HTMs are currently a bottleneck for the realization of cost-effective and stable devices. Despite significant efforts dedicated towards development of new HTMs, the field is still dominated by costly small spiro-type molecule spiro-OMeTAD and even more expensive macromolecule poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine]. The high cost of these HTMs arises from the expensive synthesis and purification procedures, which limit their potential for applications in low-cost solar cells. For example, spiro-OMeTAD is synthesized in five reaction steps that require low temperature (-78 °C), sensitive (n-butyllithium or Grignard reagents) and aggressive (Br2) reagents. Moreover, spiro-OMeTAD, and other HTMs requires costly sublimation steps for purification to obtain high-performance devices. Herein we plan the synthesis and characterization of novel organic small-molecules for the hybrid solar cells. By simple reactions from readily available commercial starting materials synthesized organic molecules should be making theses HTMs very appealing for commercial prospects of hybrid solar cells.
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Synthesis and investigation of hole transporting enamines for perovskite based solar cells
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prof. dr. Vytautas GETAUTIS |
state-funded |
Research Topic Summary.
Past few years have witnessed rapid development in the hybrid solar cells. Record efficiencies of photovoltaic devices exceeding 25% have been reported and certified. In these cells, the hole transporting material (HTM) is one of the key components, which transport photo-generated holes to contact. The HTM should exhibit high enough hole mobility, suitable highest occupied molecular orbitals (HOMO) and lowest unoccupied molecular orbitals (LUMO) energy levels. The HTMs are currently a bottleneck for the realization of cost-effective and stable devices. Despite significant efforts dedicated towards development of new HTMs, the field is still dominated by costly small spiro-type molecule spiro-OMeTAD and even more expensive macromo-lecule poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine]. The high cost of these HTMs arises from the expensive synthesis and purification procedures which limit their potential for applications in low-cost solar cells. For example, spiro-OMeTAD is synthesized in five reaction steps that require low temperature (-78 °C), sensitive (n-butyllithium or Grignard reagents) and aggressive (Br2) reagents. Moreover, spiro-OMeTAD, and other HTMs requires costly sublimation steps for purification to obtain high-performance devices. Herein we plan the synthesis and characterization of novel enamines for the perovskite solar cells. By simple reactions from readily available commercial starting materials synthesized organic molecules should be making theses HTMs very appealing for commercial prospects of perovskite solar cells.
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Fibrous pharmaceutical delivery systems
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vyr.m.d. dr. Edvinas KRUGLY |
state-funded |
Research Topic Summary.
During doctoral studies research will be carried out in order to develop a functional fibrous drug delivery system with controlled drug release for the treatment of cancer metastases.
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| Design, synthesis and investigation of novel heterocyclic compounds |
doc. dr. Eglė ARBAČIAUSKIENĖ |
state-funded |
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Valorisation of poorly studied plant species by evaluating their phytochemical composition and functional properties
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prof. dr. Petras Rimantas VENSKUTONIS |
state-funded |
Research Topic Summary.
The plants biosynthesize various secondary metabolism products, including bioactive compounds (e.g. antioxidants, antimicrobials, anticancerogenic molecules), which may find applications in food additives, functional ingredients for nutraceuticals, cosmetics, pharmaceuticals and other purposes. Considering that there are thousands of species in the Plant Kingdom and many of them are very poorly studies, it may be expected to discover (identify) new structures possessing beneficial properties, e.g. antioxidant capacity, antimicrobial and enzyme inhibitory activity, etc. The candidate species may be selected from the plants growing in Lithuania and other regions; e.g. until now performed preliminary studies have shown that the extracts from such plants possess strong radical scavenging capacity.
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