Abstract：
Organic light-emitting transistors (OLETs) are multifunctional optoelectronic devices that combine in a single structure the advantages of organic light-emitting diodes (OLEDs) and organic field-effect transistors (OFETs). However, low charge mobility and high threshold voltage are critical hurdles to practical OLET implementation. This work reports on the improvements obtained by using polyurethane films as a dielectric layer material in place of the standard poly(methyl methacrylate) (PMMA) in OLET devices. It was found that polyurethane drastically reduces the number of traps in the device, thereby improving electrical and optoelectronic device parameters. In addition, a model was developed to rationalize an anomalous behavior at the pinch-off voltage. Our findings represent a step forward to overcome the limiting factors of OLETs that prevent their use in commercial electronics by providing a simple route for low-bias device operation.
摘要：
有机发光晶体管(OLET)是多功能光电器件,其将有机发光二极管(OLED)和有机场效应晶体管(OFET)的优点组合在单个结构中。然而,低电荷迁移率和高阈值电压是实现实际OLET的关键障碍。这项工作报告了通过使用聚氨酯膜作为介电层材料代替OLET器件中的标准聚（甲基丙烯酸甲酯）（PMMA）而获得的改进。发现聚氨酯大大减少了装置中陷阱的数量，从而改善电气和光电器件参数。此外,开发了一个模型来合理化夹断电压下的异常行为。我们的发现为克服OLET的限制因素迈出了一步，这些限制因素通过为低偏置设备操作提供简单的途径来阻止其在商业电子产品中的使用。
