| Title |
Naujų fenoksazino fragmentus turinčių puslaidininkių sintezė ir panaudojimas organiniuose šviestukuose / |
| Translation of Title |
Synthesis and application in organic light emitting diodes of new semiconductors having phenoxazine fragments. |
| Authors |
Sipavičiūtė, Diana |
| Full Text |
|
| Pages |
63 |
| Keywords [eng] |
organic light emitting diode ; ionization potential ; amorphous layer ; glass transition temperature |
| Abstract [eng] |
This research work presents the synthesis of electroactive phenoxazine derivatives. New phenoxazine derivatives containing one or two phenylethenyl fragments were synthesized and identified. The thermal properties of the obtained compounds were established by applying the techniques of differential scanning calorimetry and thermogravimetric analysis. It was determined that some of synthesized derivatives are suitable for the formation of hole transporting layers. The ionization potentials of layers of the materials, which were established by using the method of electron photoemission in air, ranged from 4.94 eV to 5.31 eV. Phenoxazine derivatives containing two phenylethenyl fragments were adapted to form hole-transporting layers in organic light emitting diodes. The devices indicated the turn-on voltages in the range of 3.5-7.2 V, photometric efficiency reached 1.52- 2.95 cd/A at the maximum brightness of 140- 2100 cd/m2. In addition, aryl substituted phenoxazine monomers were synthesized and characterized. Polymerization products were obtained from the monomers by cationic polymerization. The glass transition temperatures of polymers exceeded 100 oC and values of the ionization potentials of their amorphous layers were about 5.2 eV. Polymers were also tested as hole-transporting layers in organic light emitting diodes. A technological scheme was developed for the production of aryl substituted phenoxazine monomers and occupational safety was described for the materials, which were used in the research work. |
| Dissertation Institution |
Kauno technologijos universitetas. |
| Type |
Master thesis |
| Language |
Lithuanian |
| Publication date |
2017 |
