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Efficient white organic light-emitting diodes with mixed electron transporting layers

Ji Hoon Seo, Jung Sun Park, Suk Jae Lee, Bo Min Seo, Kum Hee Lee, Jung Keun Park, Seung Soo Yoon, Young Kwan Kim*
The Journal of Mechanical Science and Technology, vol. 25, no. 1, pp.17-19, 2011

Abstract : The authors demonstrated phosphorescent white organic light-emitting diodes (PHWOLED) with mixed electron transporting layers (M-ETL) using 4,7-diphenyl-1,10-phenanthroline (BPhen)/4,4'-bis (carbazol-9-yl)biphenyl (CBP). The M-ETL PHWOLED exhibited the optimum balance of holes and electrons, owing to the low electron mobility of the CBP M-ETL. The optimized PHWOLED showed a peak current efficiency of 16.85 cd/A and a peak external quantum efficiency of 7.32%.

Keyword : 4,4'-Bis (carbazol-9-yl)biphenyl; 4,7-Diphenyl-1,10-phenanthroline; Mixed electron transporting layers; Phosphorescent white organic lightemitting
 
 
 
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