Department of Physics, Wake Forest University , Winston-Salem, North Carolina 27109, United States.
Materials and Manufacturing Directorate, Air Force Research Laboratory , WPAFB, Ohio 45433, United States.
ACS Appl Mater Interfaces. 2017 May 31;9(21):18120-18126. doi: 10.1021/acsami.7b03232. Epub 2017 May 19.
Solution-processable electronic devices are highly desirable due to their low cost and compatibility with flexible substrates. However, they are often challenging to fabricate due to the hydrophobic nature of the surfaces of the constituent layers. Here, we use a protein solution to modify the surface properties and to improve the wettability of the fluoropolymer dielectric Cytop. The engineered hydrophilic surface is successfully incorporated in bottom-gate solution-deposited organic field-effect transistors (OFETs) and hybrid organic-inorganic trihalide perovskite field-effect transistors (HTP-FETs) fabricated on flexible substrates. Our analysis of the density of trapping states at the semiconductor-dielectric interface suggests that the increase in the trap density as a result of the chemical treatment is minimal. As a result, the devices exhibit good charge carrier mobilities, near-zero threshold voltages, and low electrical hysteresis.
由于成本低且与柔性衬底兼容，可溶液处理的电子器件备受关注。然而，由于组成层表面的疏水性，它们的制造往往具有挑战性。在这里，我们使用蛋白质溶液来修饰表面性质并提高氟聚合物电介质 Cytop 的润湿性。经过工程设计的亲水表面成功地整合到在柔性衬底上制造的底栅溶液沉积有机场效应晶体管（OFET）和混合有机-无机三卤化钙钛矿场效应晶体管（HTP-FET）中。我们对半导体-介电界面处俘获态密度的分析表明，化学处理导致的陷阱密度增加很小。因此，这些器件表现出良好的电荷载流子迁移率、近零阈值电压和低电滞后。
