[13p-N205-1~13] 12.4 Organic light-emitting devices and organic transistors

△ [13p-N205-4] Electrical properties of OLED containing light-irradiated TPBi layer evaluated by displacement current and transient EL measurements

〇Yuki Tazo¹, Shin Shinohara¹, Hisao Ishii^1,2,4, Yuya Tanaka^1,2,3 (1.GSSE Chiba Univ., 2.CFS Chiba Univ., 3.JST PRESTO, 4.MCRC Chiba Univ.)

Keywords:Organic electro luminescence, Polarizaiton Charge Density, Vibrational energy generator

In the deposited film of TPBi, which is used as an electron transport layer in OLEDs, polarization charge (σ_pol) is formed on the surface of the film. σ_pol is an important factor that determines the performance of OLEDs and the output of vibration energy generator. In the last year's Applied Physics Conference, we reported that the orientation of TPBi was improved and σ_pol increased by a factor of 1.5 by depositing it under light irradiation. However, we were unable to investigate the change in electrical conduction properties that accompanied this change. In this study, we fabricated a bilayer device with light irradiation during film deposition and investigated the electrical conduction properties in detail.