Shushanna Vardanyan, Nagharsh Mirakyan and Svetlana Sargsyan, three researchers from Yerevan State University are currently on secondment at Nanoversa UAB in Kaunas.
Svetlana and Nagharsh are working on synthesising metal-free emitting and hole transporting materials (HTM). HTMs are a key component of optoelectronic devices including organic emitting diodes (OLEDs) and perovskite solar cells (PSCs). These HTMs facilitate the transport of “holes” which are essentially the absence of electrons within an atomic structure. The transfer of these positively charged holes from the active layer of the device to the anode enables the emission of light in OLEDs or the generation of electricity in PSCs.
Organic HTMs are an attractive target for ongoing research because they are relatively low-cost, efficient and biodegradable. Nagharsh and Svetlana have already managed to produce a number of compounds containing donor and acceptor groups. Several donor moieties were made by interacting new p-Phenylenediamine (PPD) derivatives with fragments such as methoxy, thiomethyl, carbazole or dibenzothiophene. After their synthesis, the researchers plan to analyse the photophysical properties of these materials.
Meanwhile, Shushanna has been synthesising and analysing new infrared (IR) or near-IR emitting materials for use in OLEDs. These compounds have a donor-acceptor-donor (D-A-D) structure, where the donor sections are electron-rich and the acceptor is electron-deficient. When such a molecule is excited, an electron moves from the donor to the acceptor. This charge transfer can result in the emission of light. The compounds that Shushanna is synthesising specifically contain cyano groups as well as conjugated systems which will serve as red emitters in OLEDs.
Stepping outside of the lab, the researchers have marvelled at the impressive Lithuanian architecture and the beautiful green landscapes. Their travels led them to some of the country’s historic sites such as Trakai castle in Vilnius and Kaunas castle. Nagharsh was even able to fulfil his lifelong dream of parachute jumping in the city of Prienai. Equally delightful was the friendliness and openness the group experienced from the locals who introduced them to Lithuanian cuisine and their love for basketball.
Svetlana and Nagharsh are working on synthesising metal-free emitting and hole transporting materials (HTM). HTMs are a key component of optoelectronic devices including organic emitting diodes (OLEDs) and perovskite solar cells (PSCs). These HTMs facilitate the transport of “holes” which are essentially the absence of electrons within an atomic structure. The transfer of these positively charged holes from the active layer of the device to the anode enables the emission of light in OLEDs or the generation of electricity in PSCs.
Organic HTMs are an attractive target for ongoing research because they are relatively low-cost, efficient and biodegradable. Nagharsh and Svetlana have already managed to produce a number of compounds containing donor and acceptor groups. Several donor moieties were made by interacting new p-Phenylenediamine (PPD) derivatives with fragments such as methoxy, thiomethyl, carbazole or dibenzothiophene. After their synthesis, the researchers plan to analyse the photophysical properties of these materials.
Meanwhile, Shushanna has been synthesising and analysing new infrared (IR) or near-IR emitting materials for use in OLEDs. These compounds have a donor-acceptor-donor (D-A-D) structure, where the donor sections are electron-rich and the acceptor is electron-deficient. When such a molecule is excited, an electron moves from the donor to the acceptor. This charge transfer can result in the emission of light. The compounds that Shushanna is synthesising specifically contain cyano groups as well as conjugated systems which will serve as red emitters in OLEDs.
Stepping outside of the lab, the researchers have marvelled at the impressive Lithuanian architecture and the beautiful green landscapes. Their travels led them to some of the country’s historic sites such as Trakai castle in Vilnius and Kaunas castle. Nagharsh was even able to fulfil his lifelong dream of parachute jumping in the city of Prienai. Equally delightful was the friendliness and openness the group experienced from the locals who introduced them to Lithuanian cuisine and their love for basketball.