Effect of molecular weight on the efficiency of poly(N-vinylcarbazole)-based polymer light-emitting diodes
Polymer light-emitting diodes based on poly(N-vinylcarbazole) (PVK) with molecular weights M{sub W} of 1.1 x 10{sup 6} and {approx}7.5 x 10{sup 4} are compared. For devices without an electron transport layer (ETL), the high M{sub W} PVK yields higher external quantum efficiency (0.67% vs 0.18%), but for devices with an ETL, the low M{sub W} PVK yields higher efficiency (1.13% vs 0.83%). This intriguing difference is believed to result from higher energetic disorder in the high M{sub W} polymer and different recombination zone-quenching metal electrode distances, in agreement with Konezny et al. [Appl. Phys. Lett. 97, 143305 (2010)].
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC02-07CH11358
- OSTI ID:
- 1033596
- Report Number(s):
- IS-J 7647
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 20 Vol. 99; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
Similar Records
Comparison of light out-coupling enhancements in single-layer blue-phosphorescent organic light emitting diodes using small-molecule or polymer hosts
High-performance ultraviolet detection and visible-blind photodetector based on Cu{sub 2}O/ZnO nanorods with poly-(N-vinylcarbazole) intermediate layer
Dependence of ultraviolet nanosecond laser polymer ablation on polymer molecular weight: Poly(methyl methacrylate) at 248 nm
Journal Article
·
Wed Nov 06 23:00:00 EST 2013
· Journal of Applied Physics
·
OSTI ID:22257794
High-performance ultraviolet detection and visible-blind photodetector based on Cu{sub 2}O/ZnO nanorods with poly-(N-vinylcarbazole) intermediate layer
Journal Article
·
Sun Dec 13 23:00:00 EST 2015
· Applied Physics Letters
·
OSTI ID:22486227
Dependence of ultraviolet nanosecond laser polymer ablation on polymer molecular weight: Poly(methyl methacrylate) at 248 nm
Journal Article
·
Thu Nov 30 23:00:00 EST 2006
· Journal of Applied Physics
·
OSTI ID:20884925