Solution‐Grown Organic Single‐Crystalline p‐n Junctions with Ambipolar Charge Transport

Abstract

Organic single-crystalline p-n junctions are grown from mixed solutions. First, C60 crystals (n-type) form and, subsequently, C8-BTBT crystals (p-type) nucleate heterogeneously on the C60 crystals. Both crystals continue to grow simultaneously into single-crystalline p-n junctions that exhibit ambipolar charge transport characteristics. This work provides a platform to study organic single-crystalline p-n junctions.

Single-crystal tetrathiafulvalene microwire arrays formed by drop-casting method in the saturated solvent atmosphere

“…The organic microwire arrays with large-area production and high crystalline quality have great potential in the application of high-performance integrated devices and circuits in nanoelectronics [32,33]. In our experiment, the organic devices based on the arrays of single-crystal TTF microwires are fabricated in bottomcontact geometry.…”

The Emergence of Organic Single‐Crystal Electronics

“…[60] It can realize the function of ad iode or rectifier, and ambipolar transport properties can be observed in organic single-crystal p-n heterojunction field-effect transistors. [61] Additionally,p hotovoltaic effects can be achieved in organic p-n heterojunctions. [62] Compared with inorganic heterojunctions,organic heterojunctions have some special features.F or example,t he existence of noncovalent bonds,s uch as van der Waals forces,i no rganic semiconductors makes the materials suitable for "bottom-up" growth through self-assembly,whereby the formation of large-area heterojunctions at low cost is possible.F urthermore,c hemical synthesis allows the electronic structures of both p-type and n-type organic semiconductors,a nd thus the performance,t ob et ailored, so it is possible to design aw ell-matched p-n heterojunction material.…”

Determination of crystal orientation in organic thin films using optical microscopy

“…The fast and slow axes n 1 , n 2 are determined based on the DIC brightness and the crystallographic axes a, b are assigned according to the relationship established from the crack analysis, assuming that films formed at the two substrate temperatures adopt the same polymorph. The principal ribbon growth direction is parallel to the [100] direction which is the fast growth direction of C 8 -BTBT [33,34]. Besides, ribbon growth is also observed along [110].…”