BTBT-based organic semiconducting materials for EGOFETs with prolonged shelf-life stability

Shaposhnik, P.A.; Trul, A.A.; Poimanova, E.Y.; Sorokina, E.A.; Borshchev, O.V.; Agina, E.V.; Ponomarenko, S.A.

Авторы: Shaposhnik Polina A., Trul Askold A., Poimanova Elena Yu, Sorokina Ekaterina A., Borshchev Oleg V., Agina Elena V., Ponomarenko Sergey A.
Журнал: Organic Electronics
Том: 129
Год издания: 2024
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Номер статьи: 107047
DOI: 10.1016/j.orgel.2024.107047
Аннотация: Electrolyte-gated organic field-effect transistors are electronic devices that are being actively developing as a platform for ultra-sensitive biosensors. The organic semiconductor shelf-life stability is important for the practical application of EGOFETs. Therefore, we aimed to develop the organic semiconductor that combines high electrical performance with stability of thin film morphology and electrical characteristics. Two OSC materials were investigated: commercially available C8-BTBT and siloxane dimer BTBT, D2-Und-BTBT-Hex, both characterized by high transconductance and ON/OFF ratio after EGOFET fabrication. Shelf-life was evaluated by keeping the devices under ambient conditions and periodical measuring transfer characteristics in water. C8- BTBT devices demonstrated a sharp decline of ON/OFF ratio within three weeks, which was associated with the thin film reorganization from metastable surface induced 2D crystals to thermodynamically stable 3D crystals leading to appearance of defects in the thin film and subsequent separation into individual crystals. D2-Und- BTBT-Hex had much more stable morphology due to intrinsic properties of the dimer molecules: the presence of a bulky but flexible disiloxane group linking two BTBT moieties together, which leads to a higher molar weight and less crystallization enthalpy. Both these factors stabilize the surface phase thus increasing stability of the thin films of the dimer. It was shown that the devices using D2-Und-BTBT-Hex as a semiconductor layer can be stored at shelf without any additional precautions for at least 4 months.
Добавил в систему: Шапошник Полина Алексеевна

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BTBT-based organic semiconducting materials for EGOFETs with prolonged shelf-life stabilityстатья

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