Rubrene (RUB) is one of the most studied organic semiconductors because, in the orthorhombic single-crystal phase, it exhibits a record exciton diffusion length and one of the highest charge carrier mobilities ever reported. Here, thin films of oriented crystalline RUB are successfully grown in vacuum on millimeter-sized (010)-β-alanine (β-ala) single crystals with a step-growth protocol, exploiting organic epitaxy. The experimental characterization demonstrates that these RUB films grow in the orthorhombic polymorph with the (100)RUB plane in contact with the (010)β-ala surface and with precise azimuthal orientations. A complementary study of the RUB(100)/β-ala(010) interface, performed by computational simulations, confirms the epitaxial relations expected by considering the molecular scale corrugations of the surfaces. Moreover, thanks to the wide transparency region of β-ala, the RUB absorption bands in the UV range are directly detected for the first time. Finally, removal of the water-soluble substrate enables the integration of the films in field effect transistors as high quality active organic layers. The characteristics of such RUB-based devices confirm the quality and versatility of epitaxial thin films for use in organic electronics.

Trabattoni, S., Raimondo, L., Campione, M., Braga, D., Holmberg, V., Norris, D., et al. (2015). Substrate Selection for Full Exploitation of Organic Semiconductor Films: Epitaxial Rubrene on β-Alanine Single Crystals. ADVANCED MATERIALS INTERFACES, 2(18) [10.1002/admi.201500423].

Substrate Selection for Full Exploitation of Organic Semiconductor Films: Epitaxial Rubrene on β-Alanine Single Crystals

TRABATTONI, SILVIA
;
RAIMONDO, LUISA
Secondo
;
CAMPIONE, MARCELLO;BRAGA, DANIELE;MORET, MASSIMO;SASSELLA, ADELE
Ultimo
2015

Abstract

Rubrene (RUB) is one of the most studied organic semiconductors because, in the orthorhombic single-crystal phase, it exhibits a record exciton diffusion length and one of the highest charge carrier mobilities ever reported. Here, thin films of oriented crystalline RUB are successfully grown in vacuum on millimeter-sized (010)-β-alanine (β-ala) single crystals with a step-growth protocol, exploiting organic epitaxy. The experimental characterization demonstrates that these RUB films grow in the orthorhombic polymorph with the (100)RUB plane in contact with the (010)β-ala surface and with precise azimuthal orientations. A complementary study of the RUB(100)/β-ala(010) interface, performed by computational simulations, confirms the epitaxial relations expected by considering the molecular scale corrugations of the surfaces. Moreover, thanks to the wide transparency region of β-ala, the RUB absorption bands in the UV range are directly detected for the first time. Finally, removal of the water-soluble substrate enables the integration of the films in field effect transistors as high quality active organic layers. The characteristics of such RUB-based devices confirm the quality and versatility of epitaxial thin films for use in organic electronics.
Articolo in rivista - Articolo scientifico
Crystalline thin films; Organic epitaxies; Rubrene; Wet-transfer; β-alanine; OFET
English
1-ott-2015
2015
2
18
1500423
partially_open
Trabattoni, S., Raimondo, L., Campione, M., Braga, D., Holmberg, V., Norris, D., et al. (2015). Substrate Selection for Full Exploitation of Organic Semiconductor Films: Epitaxial Rubrene on β-Alanine Single Crystals. ADVANCED MATERIALS INTERFACES, 2(18) [10.1002/admi.201500423].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/95693
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