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Preparation and electrical characterization of rubrene:MoO $$_{3}$$ film

Li Ruidong,Deng Jinxiang,Chen Liang,Kong Le,Wang Xiaolei,Meng Junhua,Sun Junjie,Zhang Xiaoxia,Zhang Jie,Wang Guisheng,Yang Qianqian,Gao Hongli

In this paper, rubrene:MoO \(_{3}\) mixed films were deposited on quartz glass and p-Si substrates using thermal evaporation technique. We fabricated the devices based on rubrene:MoO \(_{3}\) mixed films in the form of Al/rubrene:MoO \(_{3}\) /p-Si/Al. The electrical characteristics of the rubrene:MoO \(_{3}\) film (with 1:1 weight ratio)-based devices were measured using Hall system. The results indicate the enhanced hole concentration and hole carrier mobility. In addition, the presence of charge transfer complexes leads to an increase of the conductivity and the contact between sample and electrode is almost Ohmic contact. To investigate the effect of MoO \(_{3}\) , the rubrene:MoO \(_{3}\) mixed films with different concentrations of MoO \(_{3}\) were deposited using thermal evaporation technique and the Schottky barrier devices based on rubrene:MoO \(_{3\, }\) mixed films were fabricated. The electrical characteristics demonstrate that the charge transfer complex had been formed when rubrene and MoO \(_{3}\) mixed. Our results demonstrated improvement of the contact between electrode and sample in electronic devices.