Organic TFT의 고전도성 물질 - 전이금속 산화물 복합체 기반 접촉전극 제조 기술에 관한 연구

Abstract

Organic electronic devices have a variety of processes and infinite materials at low cost, which has attracted a lot of research attention due to numerous potential applications. The key to improving the performance of devices such as organic field effect transistors (OTFTs) is to select contact electrode materials that provide efficient charge injection to active channels. The contact electrode affects the active channel; it determines the carrier type in the energy level alignment and manages charge injections associated with the quality of the contact interface to confirm device performance. Au is the most commonly used electrode for source-drain electrode materials, and thin films based on two-dimensional materials such as metal oxides and graphene are attracting attention as alternative electrode materials. However, materials such as Au and graphene are expensive and deposited with relatively complex processes. In addition, because the surface is not good due to the formation of the interfacial dipole layer, there is a considerable charge injection barrier, so research on finding alternative electrode materials should be carried out to avoid these disadvantages. In this study, the contact electrode of OTFTs was implemented by bar coating, which is a relatively simple process using transition metal oxides capable of solution treatment, and electrical and morphological characteristics were analyzed. This study also explored the method of fabricating a transition metal oxide composite as a material for efficient charge transfer of contact electrodes.