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Molecular end groups impact on structural and electronic properties of thiophene-phenylene co-oligomer single crystalsтезисы доклада
- Авторы: Dominskiy D.I., Sosorev A.Yu, Rybalova T.V., Sorokina N.I., Alekseeva O.A., Andrianova A.V., Gvozdkova I.A., Borshchev O.V., Ponomarenko S.A., Paraschuk D.Yu
- Сборник: 13th International Conference on Organic Electronics - 2017 (ICOE-2017). Book of abstracts
- Тезисы
- Год издания: 2017
- Место издания: Москва
- Первая страница: 96
- Последняя страница: 96
- Аннотация: Single crystals of thiophene-phenylene co-oligomers (TPCO) are promising optoelectronic materials for light-emitting devices as they combine efficient charge carrier transport and high luminescence. These electronic properties are controlled by the chemical structure of the molecules and their crystal packing; however, the structure-property relationships in TPCO single crystals have not yet been properly understood. Here, we study the impact of molecular end-groups on the structural and electronic properties of vapor-grown TPCO single crystals with the same phenylene-thiophene-thiophene-phenylene (PTTP) conjugated core using optical/atomic force microscopy, x-ray diffraction, DFT calculations, contact angle measurements and field-effect transistor (FET) measurements. Calculated HOMO and LUMO energy levels of the TPCOs show their small variation (<0.22 eV) with the end-group type; however, the static dipole moment of half TPCO varies noticeably. Variation of the end-group types results in a significant impact on the crystal shape, the molecular orientation vs their basal plane according to x-ray data, and the surface energy. Top-contact top-gate TPCO single-crystal FETs with printed electrodes exhibited p-type semiconductor behavior with charge carrier mobility in the range 0.03–0.1 cm2/Vs. We discuss the FET performance in relation with structural features of the TPCO single crystals.
- Добавил в систему: Доминский Дмитрий Игоревич