Electron injection mechanisms of green organic light-emitting devices fabricated utilizing a double electron injection layer consisting of cesium carbonate and fullerene
- Authors
- Yang, J. S.; Choo, D. C.; Kim, T. W.; Jin, Y. Y.; Seo, J. H.; Kim, Y. K.
- Issue Date
- Sep-2010
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Organic light-emitting devices; Cesium carbonate; Fullerene; Double electron injection layer
- Citation
- THIN SOLID FILMS, v.518, no.22, pp.6149 - 6152
- Indexed
- SCIE
SCOPUS
- Journal Title
- THIN SOLID FILMS
- Volume
- 518
- Number
- 22
- Start Page
- 6149
- End Page
- 6152
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/174149
- DOI
- 10.1016/j.tsf.2010.04.061
- ISSN
- 0040-6090
- Abstract
- Electron injection mechanisms of the luminance efficiency of green organic light-emitting devices (OLEDs) fabricated utilizing a cesium carbonate (Cs2CO3)/fullerene (C-60) heterostructure acting as an electron injection layer (EIL) were investigated. Current density-voltage and luminance-voltage measurements showed that the current densities and the luminances of the OLEDs with a Cs2CO3 or Cs2CO3/C-60 EIL were higher than that of the OLEDs with a Liq EIL. The luminance efficiency of the OLEDs with a Cs2CO3 EIL was almost three times higher than that of the OLEDs with a Liq EIL Because the electron injection efficiency of the Cs2CO3 layer in OLEDs was different from that of the C-60 layer, the luminance efficiency of the OLEDs with a double EIL consisting of a Cs2CO3 layer and a C-60 layer was smaller than that of the OLEDs with a Cs2CO3 EIL The electron injection mechanisms of OLEDs with a Cs2CO3 and C60 double EIL are described on the basis of the experimental results.
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