Issue 14, 2016

Toward highly efficient blue organic light-emitting diodes: fabricating a good-quality emissive layer cast from suitable solvents

Abstract

Spin-cast from various solvents, emissive layers show different film morphologies and performances in solution-processed organic light-emitting diodes (OLEDs). Here we fabricated and demonstrated highly efficient blue OLEDs based on bis[3,5-difluoro-2-(2-pyridyl)phenyl]-(2-carboxypyridy)iridium(III) by choosing several kinds of solvents for spin-coating. Experiments indicate that the single-layer device with an emissive film cast from chlorobenzene shows its best performance with a highest current efficiency of 18.99 cd A−1, a maximum luminance of 20.5 × 103 cd m−2 and an emission band centered at 474 nm. The efficiency achieved is the highest reported for solution-processed simple-manufactured OLEDs doped with transition metal phosphors emitting in the blue region.

Graphical abstract: Toward highly efficient blue organic light-emitting diodes: fabricating a good-quality emissive layer cast from suitable solvents

Supplementary files

Article information

Article type
Paper
Submitted
27 sept. 2015
Accepted
06 nov. 2015
First published
09 nov. 2015

Dalton Trans., 2016,45, 6118-6123

Author version available

Toward highly efficient blue organic light-emitting diodes: fabricating a good-quality emissive layer cast from suitable solvents

D. Ma, L. Duan and Y. Qiu, Dalton Trans., 2016, 45, 6118 DOI: 10.1039/C5DT03776J

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