Toward highly efficient blue organic light-emitting diodes: fabricating a good-quality emissive layer cast from suitable solvents. Issue 14 (17th November 2015)

• Record Type: Journal Article
• Authors: Ma, Dongxin; Duan, Lian; Qiu, Yong
• Is Part Of: Dalton transactions. Volume 45:Issue 14(2016)
• Page Start: 6118
• Page End: 6123
• Publication Date: 2015-11-17
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c5dt03776j
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Cast from chlorobenzene, a light-emitting layer shows its best morphology and highest efficiency of 18.99 cd A −1 in single-layer FIrpic-based OLEDs. 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 × 10 3 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.