Abstract：
Flexible organic near-infrared (NIR) phototransistors hold promising prospects for potential applications such as noninvasive bioimaging, health monitoring, and biometric authentication. For integrated circuits of high-performance devices, organic single-crystalline micro-/nanostructures with precise positioning are prominently anticipated. However, the manufacturing of organic single-crystalline arrays remains a conundrum due to difficulties encountered in patterning arrays of dewetting processes at micron-scale confined space and modulating the dewetting dynamics. Herein, we utilize a capillary-bridge lithography strategy to fabricate organic 1D arrays with high quality, homogeneous size, and deterministic location toward high-performance flexible organic NIR phototransistors. Regular micro-liquid stripes and unidirectional dewetting are synchronously achieved by adapting micropillar templates with asymmetric wettability. As a result, high-throughput 1D arrays based organic field-effect transistors exhibit high electron mobility up to 9.82 cm2 V-1 s-1 . Impressively, flexible NIR phototransistors also show outstanding photoelectronic performances with a photosensitivity of 9.87 × 105 , a responsivity of 1.79 × 104 A W-1 , and a specific detectivity of 3.92 × 1014 Jones. This work paves a novel way to pattern high-throughput organic single-crystalline microarrays toward flexible NIR organic optoelectronics.
摘要：
柔性有机近红外（NIR）光电晶体管在非侵入性生物成像等潜在应用中具有广阔的前景，健康监测,和生物认证。对于高性能器件的集成电路，具有精确定位的有机单晶微/纳米结构是突出的预期。然而,有机单晶阵列的制造仍然是一个难题，因为在微米级受限空间的去湿过程的图案化阵列和调节去湿动力学中遇到了困难。在这里，我们利用毛细管桥光刻策略来制造高质量的有机1D阵列，均匀尺寸，以及对高性能柔性有机近红外光电晶体管的确定性位置。通过调整具有不对称润湿性的微柱模板，可以同步实现规则的微液体条纹和单向去湿。因此,基于高通量1D阵列的有机场效应晶体管具有高达9.82cm2V-1s-1的高电子迁移率。令人印象深刻的是,柔性近红外光电晶体管还表现出优异的光电性能，光敏度为9.87×105，1.79×104AW-1的响应度，和3.92×1014琼斯的特定探测率。这项工作为将高通量有机单晶微阵列图案化为柔性NIR有机光电子提供了新的方法。
