Photolithography-Compatible Flexible Electrodes Conformed Onto an Organic Bulk Crystal for Fabrication of Large-Scale Organic Transistor Array

Based on a pre-grown rubrene bulk crystal, a large-scale rubrene single-crystal transistor array is fabricated with photolithography-compatible flexible electrodes on bulk crystal. The resulting organic single-crystal transistor array exhibits a high yield with 100% device operation. The average mobility in an array with an area of 560 μm x 400 μm is 13.8 ± 5.9 cm
²
/V·s, the highest mobility obtained is 25.1 cm
²
/V·s, and the current on/off ratio can reach 7.2 × 10
⁵
. These results offer a novel approach for obtaining high-integration, high-precision organic single-crystal device arrays. It also enables an effective method to study the intrinsic properties and circuit design based on an organic crystal.