Template and Temperature-Controlled Polymorph Formation in Squaraine Thin Films.

ABSTRACT: Controlling the polymorph formation in organic semiconductor thin films by the choice of processing parameters is a key factor for targeted device performance. Small molecular semiconductors such as the prototypical anilino squaraine compound with branched butyl chains as terminal functionalization (SQIB) allow both solution and vapor phase deposition methods. SQIB has been considered for various photovoltaic applications mainly as amorphous isotropic thin films due to its broad absorption within the visible to deep-red spectral range. The two known crystalline polymorphs adopting a monoclinic and orthorhombic crystal phase show characteristic Frenkel excitonic spectral signatures of overall H-type and J-type aggregates, respectively, with additional pronounced Davydov splitting. This give

SUBMITTER: Balzer F 

PROVIDER: S-EPMC9352357 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature