Center for Polymers and Organic Solids, University of California, Santa Barbara, California 93106, USA.
J Am Chem Soc. 2009 Dec 30;131(51):18220-1. doi: 10.1021/ja908441c.
To improve injection in n-type organic thin film transistors (OTFTs), a thin conjugated polyelectrolyte (CPE) layer was interposed between electrodes and the semiconductor layer. OTFTs were fabricated with [6,6]-phenyl-C(61) butyric acid methyl ester (PCBM) and Au source and drain contacts. We demonstrate that the insertion of CPEs beneath top-contact Au source/drain electrodes can be a very effective strategy for improving the carrier injection and reducing turn-on threshold voltages of n-channel OTFTs. Ultraviolet photoemission spectroscopy (UPS) indicates that the decrease of the electron injection barrier is consistent with organized dipoles at the metal/organic interface.
为了改善 n 型有机薄膜晶体管（OTFT）的注入特性，在电极和半导体层之间插入了一层薄的共轭聚合物电解质（CPE）。使用[6,6]-苯基-C（61）丁酸甲酯（PCBM）和 Au 源漏电极制备了 OTFT。我们证明了在顶接触 Au 源/漏电极下插入 CPE 可以成为一种非常有效的策略，用于改善载流子注入并降低 n 通道 OTFT 的开启阈值电压。紫外光电子能谱（UPS）表明，电子注入势垒的降低与金属/有机界面处的有序偶极子一致。
