Differential capacitance of hybrid organic/inorganic CdSe/ZnS quantum dots light-emitting device |
| |
| Authors: | A. Uddin and C. C. Teo |
| |
| Affiliation: | (1) Department of Electronics and Computer Engineering, Hanyang University, Seoul, 133-791, Korea;(2) Department of Molecular Science and Technology, Ajou University, Suwon, 443-749, Korea;(3) Korea Research Institute of Chemical Technology, Daejeon, 305-600, Korea; |
| |
| Abstract: | We have studied the differential capacitance of self-assembly hybrid organic/inorganic quantum dot (QD) light-emitting devices (QD-OLEDs) at room temperature in the frequency range of 1×103 to 1×106 Hz. Self-assembly CdSe/ZnS QDs monolayer was used to fabricate trilayer hybrid QD-OLEDs on indium tin oxide coated glass substrates. We observed negative differential capacitance (NDC) in both OLED and QD-OLEDs for the first time in the intermediate frequency range of 5×103 to 5×105 Hz. The onset and frequency range of NDC are strongly depended on the applied bias voltage. This behavior is described by a mathematical model. The simulated results showed that the NDC was due to the time-dependent transient current from the QDs and organic/metal interfacial states in the device. The probable mechanisms of NDC in organic devices are discussed. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
