Lithographical Fabrication of Organic Single-Crystal Arrays by Area-Selective Growth and Solvent Vapor Annealing

Abstract

Miniaturized organic single-crystal arrays that are addressed by reading-out circuits are crucial for high performance and high-level integration organic electronics. Here, we report a lithography compatible strategy to fabricate organic single-crystal arrays via area-selective growth and solvent vapor annealing (SVA). The organic semiconducting molecules can first selectively grow on photographically patterned drain-source electrodes, forming ordered amorphous aggregates that can further be converted to discrete single-crystal arrays by SVA. This strategy can be applied to self-align the microsized organic single crystals on predesigned locations. With this method, suppression of cross-talk among devices, organic field-effect transistors, and basic logic gate arrays with reading-out electrodes are further demonstrated.

Chaotic Organic Crystal Phosphorescent Patterns for Physical Unclonable Functions

“…Organic crystal patterns are facile to manufacture by simple solution-based processes, including inkjet printing, [16,17] solution spin casting, [18] and solution dropcasting. [19] Under in situ crystallization process, organic molecules are site-specifically nucleated and crystallized by surface treatments on the substrates [20,21] to form the desired pattern on large scales. In contrast, individual organic crystals exhibit unexpected physical features such as size, morphology, and luminescence in micro scales, applicable for anti-counterfeiting encryption keys.…”

Stencil mask defined doctor blade printing of organic single crystal arrays for high-performance organic field-effect transistors

“…34,35 Wang and co-workers employed photolithography-patterned Au electrodes to alter the surface properties of the substrate, and thus to selectively grow TES-ADT single crystals in an array form. 36 Self-assembled monolayers and pre-patterned stamps were also employed to direct the nucleation of molecules and subsequent growth of organic crystals. Park et al prepared highly aligned and patterned transistor arrays with a high density by a differential surface energy and solution shearing method.…”

Effects of molecular diffusion length on area-selective growth of organic patterns

“…As reported in the literatures, Au patterned SiO 2 template was typically employed for the ASG method [8][9][10]. In the simulation, we used a three-dimensional periodic grid 100a×100a×2a (a is the lattice constant and set to 1) to simulate SiO 2 substrates.…”

“…Recently, a bottom-up patterning strategy compatible with photolithography for OSCs was proposed [7][8][9][10][11][12], i.e., using a template with microstructures for directed growth of molecular films during physical vapor deposition (PVD). This approach shows the capability that micro-sized OSC devices and arrays can be selfassembled on pre-patterned substrates.…”