Efficiency stabilized deep blue organic light-emitting devices with a DPVBi/CBP step emitting layer operating at low voltages
- Authors
- Bang, Hyun Sung; Lee, Dea Uk; Kim, Tae Whan; Kim, JH; Seo, Jeongheon; Kim, YK
- Issue Date
- Jan-2007
- Publisher
- TAYLOR & FRANCIS LTD
- Keywords
- deep blue organic light-emitting device; electrical properties; optical properties; step emitting layer
- Citation
- MOLECULAR CRYSTALS AND LIQUID CRYSTALS, v.470, pp.259 - 267
- Indexed
- SCIE
SCOPUS
- Journal Title
- MOLECULAR CRYSTALS AND LIQUID CRYSTALS
- Volume
- 470
- Start Page
- 259
- End Page
- 267
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/180560
- DOI
- 10.1080/15421400701495948
- ISSN
- 1542-1406
- Abstract
- The electrical and the optical properties of deep blue organic light-emitting devices (OLED) utilizing a step emitting layer (SEL) consisting of 4,4'-Bis(2,2'-diphenylethen-1-yl)biphenyl (DPVBi) and 4,4'-Bis(carbazol-9-yl)biphenyl (CLIP) were investigated. The turn-on voltage of the OLEDs with a SEL was smaller than those of the OLEDs with a CBP or a DPVBi emitting layer. While the efficiency of the OLEDs with a SEL was very stable, regardless of variations in the applied voltage, that of the OLEDs with a CBP or a DPVBi emitting layer varied with the applied voltage. The dominant peak in the electroluminescence spectrum for the OLEDs with a SEL appeared at 455nm. The Commission Internationale de l'Eclairage chromaticity (CIE) coordinates of the OLEDs with a SEL at 11 V were (0.160, 0.168), which is similar to the CIE coordinates of the CBP layer.
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