Precise Positioning of Organic Semiconductor Single Crystals with Two-component Aligned Structure Through 3D Wettability-Induced Sequential Assembly.

Abstract

Highly ordered organic semiconductor single crystal (OSSC) arrays are ideal building blocks for functional organic devices. However, most of the current methods are only applicable to fabricate OSSC arrays of a single component, which significantly hinders the application of OSSC arrays in integrated organic circuits. Here, we present a universal approach, termed three-dimensional (3D) wettability-induced sequential assembly (3DWSA) that can programmatically and progressively manipulate the crystallization locations of different organic semiconductors at the same spatial position by using a 3D microchannel template, for the fabrication of the two-component OSSC arrays. As an example, we successfully prepare two-component, bilayer structured OSSC arrays consisting of n-type N,N -bis(2-phenylethyl)-perylene-3,4:9,10-tetracarboxylic diimide (BPE-PTCDI) and p-type 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-PEN) microbelts (MBs). The bi-component OSSCs show ambipolar carrier transport properties with hole and electron mobilities of 0.342 and 0.526 cm2 V-1 s-1, respectively. Construction of complementary inverters is further demonstrated based on the two-component OSSCs. The capability of integration of multi-component OSSC arrays opens up unique opportunities for future high-performance organic complementary circuits.