Description
In the field of organic electronics there exists a large demand for electrochemically active materials, allowing the construction of low cost and environmental-friendly devices. Such materials can be used in organic field effect transistors (OLEDs), organic light-emitting diodes (OLEDs), organic solar cells (OSCs) and sensors. Therefore, in recent years, much research attention has been paid to the preparation of new compounds with controlled optical properties (energy gap) and electron (the position of HOMO and LUMO levels). HOMO and LUMO levels of organic semiconductors and, by consequence, their optical and redox properties as well as their air stability in device operating conditions, can be precisely tuned by appropriate balance between electron accepting and electron donating groups present in the molecule (macromolecules).
Summary of project results
The final result of this project was to produce prototypes of organic field effect transistors and organic light-emitting diodes and study their characteristics in order to determine the usefulness of these new technological materials. The most promising synthesized semiconductors, with 4H-dithieno[3,2-b;2’,3’-d]pyrrole (DTP) substituent, were used as active layers in OFET and OLED devices. They showed several technologically important properties, which are taken into account in developing new organic semiconductors, such as: solubility in industrially acceptable solvents, air and aging stability, high purity, solution processability. It facilitates their deposition as films or layers on appropriate substrates by relatively simple and low cost fabricating techniques like: spin-coating, drop-casting, zone-casting etc. The investigations carried out in the frame of this project helped to achieve the progress in the design of organic semiconductors which can be applied in modern technology and especially in electronics. As a result the development of new, solution-processable organic electroactive materials allow for changing technology of electronic components. They can be used in the methods herein simpler, cheaper and less energy consuming than in the case of silicon electronics. A new type of electronics will then be at our disposal to simplify our lives in many areas.
Summary of bilateral results