Conjugated Polyelectrolyte Hybridized ZnO Nanoparticles as a Cathode Interfacial Layer for Efficient Polymer
- Conjugated Polyelectrolyte Hybridized ZnO Nanoparticles as a Cathode Interfacial Layer for Efficient Polymer
- Issue Date
- Advanced functional materials
- VOL 온라인게재, 온라인게
- Alkoxy side-chain tethered polyfl uorene conjugated polyelectrolyte (CPE), poly[(9,9-bis((8-(3-methyl-1-imidazolium)octyl)-2,7-fl uorene)-alt-(9,9-bis(2- (2-methoxyethoxy)ethyl)-fl uorene)] dibromide (F8imFO 4 ), is utilized to obtain CPE-hybridized ZnO nanoparticles (NPs) (CPE:ZnO hybrid NPs). The surface defects of ZnO NPs are passivated through coordination interactions with the oxygen atoms of alkoxy side-chains and the bromide anions of ionic pendent groups from F8imFO 4 to the oxygen vacancies of ZnO NPs, and thereby the fl uorescence quenching at the interface of yellow-emitting poly( p -phenylene vinylene)/CPE:ZnO hybrid NPs is signifi cantly reduced at the CPE concentration of 4.5 wt%. Yellow-emitting polymer light-emitting diodes (PLEDs) with CPE(4.5 wt%):ZnO hybrid NPs as a cathode interfacial layer show the highest
device effi ciencies of 11.7 cd A −1 at 5.2 V and 8.6 lm W −1 at 3.8 V compared to the ZnO NP only (4.8 cd A −1 at 7 V and 2.2 lm W −1 at 6.6 V) or CPE only (7.3 cd A −1 at 5.2 V and 4.9 lm W −1 at 4.2 V) devices. The results suggest here that the CPE:ZnO hybrid NPs has a great potential to improve the device performance of organic electronics.
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.