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

Abstract

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 $560\,\,\mu \text{m}\,\,\times 400\,\,\mu \text{m}$ is 13.8 ± 5.9 ${\mathrm {cm}}^{\textsf {2}}/\text{V}\cdot \text{s}$ , the highest mobility obtained is 25.1 ${\mathrm {cm}}^{\textsf {2}}/\text{V}\cdot \text{s}$ , and the current ON/OFF ratio can reach $7.2\,\,\times \,\, 10^{\textsf {5}}$ . 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.