High-Performance Organic Phototransistors Based on Single-Crystalline Microwire Arrays

High-performance organic phototransistors (OPTs) have attracted considerable attention owing to their high photoresponse and low-cost solution-processing manufacturing. To meet the increasing demand for integrated optoelectronic circuits, organic single-crystalline micro-/nanowire arrays for OPTs construction are prominently anticipated. However, the manufacturing and patterning of organic single-crystalline arrays have hit a bottleneck due to the uncontrollable dewetting dynamics. In this work, a capillary-bridge lithography strategy is proposed to guide ordered nucleation and unidirectional dewetting of microfluid, thus enabling the large-scale preparation of highly aligned organic single-crystalline microwire arrays. Taking advantage of efficient carrier transport, a competitive average field-effect hole mobility (μ) of 6.64 cm² V⁻¹ s⁻¹ is obtained, and the high-throughput one-dimensional (1D) arrays based OPTs also exhibit excellent optoelectrical performance with photosensitivity (P) of 1.36 × 10⁶, responsivity (R) of 3.18 × 10⁴ A W⁻¹, and specific detectivity (D^*) of 9.22 × 10¹⁴ Jones. This work provides a guide for the designing and patterning of high-throughput OPTs toward multifunctional integrated optoelectronics.