| 학회 |
한국재료학회 |
| 학술대회 |
2017년 봄 (05/17 ~ 05/19, 목포 현대호텔) |
| 권호 |
23권 1호 |
| 발표분야 |
F. 광기능/디스플레이 재료 분과 |
| 제목 |
Characterization of OLED electrodes by impedance spectroscopy |
| 초록 |
Electron only devices (EOD) were prepared to understand the interfaces between modified elecron transport layer (ETL) and different electrodes (graphene and ITO). Highly resistive diodes were found to be best described by parallel network of capacitance effects. Short-circuiting or leak conductance is modeled by a resistor elements in parallel. In addition to the frequency and temperature independent capacitance effects of ca. 1 nF for 2 by 2 mm device, characteristic dielectric relaxations were observed, which were successfully modeled by Havriliak-Negami type complex dielectric functions of the strength around 1 nF. The temperature dependence of relaxation time constants indicate the interface energetics involving 0.5 eV or so. Sharp drop in the in leak conductance was observed around 270K. |
| 저자 |
Dang Thanh Nguyen1, Jaehyun Moon2, Jong-Sook Lee1
|
| 소속 |
1Chonnam National Univ., 2Electronics and Telecommunications Research Institute |
| 키워드 |
OLED; ITO; graphene; complex dielectric function; ETL
|
| E-Mail |
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