Enhancement of efficiency in blue organic light-emitting devices with nanoscale barrier and trapping layers embedded in an emitting layer and a hole transport layer
- Authors
- Lee, Dea Uk; Choo, Dong Chul; Kim, Tae Whan; Seo, Ji Hyun; Park, Jung Hyun; Kim, Young Kwan
- Issue Date
- Jul-2009
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Organic light-emitting diodes; Nanoscale barrier and trapping layer; Efficiency; Electrical property; Optical property
- Citation
- THIN SOLID FILMS, v.517, no.17, pp.5326 - 5329
- Indexed
- SCIE
SCOPUS
- Journal Title
- THIN SOLID FILMS
- Volume
- 517
- Number
- 17
- Start Page
- 5326
- End Page
- 5329
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/176520
- DOI
- 10.1016/j.tsf.2009.03.127
- ISSN
- 0040-6090
- Abstract
- The electrical and the optical properties of the organic light-emitting diodes (OLEDs) utilizing a tetraphenylnaphthacene (rubrene) trapping layer and an 1,3,5-tris(N-phenylbenzimidazol-2-yl)benzene (TPBI) barrier layer with a nanoscale thickness were investigated. While the operating voltage of the OLED with a rubrene trapping layer in the HTL significantly increased because of a decrease in the hole mobility of the HTL, that of the OLED with a rubrene trapping layer in the EML slightly decreased resulting from an increase of the trapped electrons and holes in a rubrene trapping layer. The electroluminescence peak corresponding to the emission zone in the EML of OLEDs with a rubrene trapping layer and a TPBI barrier layer shifts to the EML center due to the existence of trapping layer in the EML.
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