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Effect of a multiple quantum well structure as an emissive layer based on blue phosphorescent organic light-emitting diodes
- Authors
- Lee, Seok Jae; Koo, Ja Ryong; Lee, Ho Won; Lee, Dong Hyung; Lee, Kum Hee; Yoon, Seung Soo; Park, Jaehoon; Kim, Young Kwan
- Issue Date
- Nov-2013
- Publisher
- KOREAN INST METALS MATERIALS
- Keywords
- blue phosphorescent organic light-emitting diodes; multiple quantum well; triplet exciton confinement
- Citation
- ELECTRONIC MATERIALS LETTERS, v.9, no.6, pp.821 - 824
- Journal Title
- ELECTRONIC MATERIALS LETTERS
- Volume
- 9
- Number
- 6
- Start Page
- 821
- End Page
- 824
- ISSN
- 1738-8090
- Abstract
- We demonstrate a multiple quantum well (MQW) structure with charge control layers (CCLs) to produce highly efficient blue phosphorescent organic light-emitting diodes (OLEDs). Three types of devices (A, B, and C) were fabricated with the following emitting layer structures while maintaining the thickness of the EMLs: host-emitter doping layers, nondoping layers, and CCLs. Triplet energies in such MQW devices were confined at the EMLs. The properties of a device with an MQW demonstrated a maximum luminous efficiency and external quantum efficiency of 18.33 cd/A and 9.47%, respectively. The device also showed a reduction in the turn-on voltage from 3.5 V to 2.5 V and an enhancement of the power efficiency. The described MQW device concept is considered to be useful for future OLED displays and light applications.
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Related Researcher
- Kim, Young Kwan
- Engineering (Applied Science)