Browsing by Author "Kokars, Valdis"
Now showing items 1-5 of 5
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Effects of steric encumbrance of iridium(iii) complex core on performance of solution-processed organic light emitting diodes
Ruduss, Armands; Kokars, Valdis; Tetervenoka, Natalija; Vembris, Aivars; Traskovskis, Kaspars (Royal Society of Chemistry, 2020)Iridium(iii) complexes are the most frequently applied commercialized green and red emitters for organic light emitting diode (OLED) displays. Throughout years a significant research effort has been devoted to modify these ... -
Glass-forming nonsymmetric DWK-dyes with 5,5,5-triphenylpentyl and piparazine moieties for light-amplification studies
Zarins, Elmars; Puciriuss, Toms; Pervenecka, Julija; Vembris, Aivars; Kokars, Valdis (SPIE, 2018)A series of 2,6-bis-styryl-4H-pyran-4-ylidene fragment containing glass-forming organic compounds with bonded amorphous phase promoting bulky triphenyl moieties through piperazine structural fragment [2-(2-(4-(bis(2-(tri ... -
Investigation of photoluminescence and amplified spontaneous emission properties of cyanoacetic acid derivative (KTB) in PVK amorphous thin films
Pervenecka, Julija; Vembris, Aivars; Zarins, Elmars; Kokars, Valdis (SPIE, 2018)In this work photoluminescence and amplified spontaneous emission properties of new original 2-cyanoacetic acid derivative in different concentration mixed in polyvinyl carbazole (PVK) matrix were investigated. Ethyl ... -
Photophysical and Electrical Properties of Highly Luminescent 2/6-Triazolyl-Substituted Push-Pull Purines
Sebris, Armands; Novosjolova, Irina; Traskovskis, Kaspars; Kokars, Valdis; Tetervenoka, Natalija; Vembris, Aivars; Turks, Māris (American Chemical Society, 2022)New push-pull N(9)-alkylated 6-piperidino-2-triazolylpurine and 2-piperidino-6-triazolylpurine derivatives are synthesized, and their optical and optoelectronic properties are comprehensively characterized with experimental ... -
Stimulated emission and optical properties of pyranyliden fragment containing compounds in PVK matrix
Vembris, Aivars; Zarins, Elmars; Kokars, Valdis (Elsevier Ltd, 2017)Organic solid state lasers are thoughtfully investigated due to their potential applications in communication, sensors, biomedicine, etc. Low amplified spontaneous emission (ASE) excitation threshold value is essential for ...