Tailoring the highest occupied molecular orbital level of poly(N-vinylcarbazole) hole transport layers in organic multilayer heterojunctions
- Graphene Research Institute, Sejong University, Gwangjin-gu, Seoul 143-747 (Korea, Republic of)
- Materials and Life Science Research Division, Korea Institute of Science and Technology, Hwarang-ro 14-gil, Seoul 136-791 (Korea, Republic of)
We report the tailoring of the electronic structure of poly(N-vinylcarbazole) (PVK) using a mixture layer of polyaniline:poly(p-styrenesulfonic acid) (PANI:PSS) in organic multilayer PVK/PANI:PSS/poly(3,4-ethylenedioxythiophene):PSS heterojunctions. The overall electronic structure of the PVK overlayer was systematically down-shifted while the work function of PANI:PSS increased as a function of the PSS-to-PANI weight ratio for the ratio range from 1 to 11 in the PANI:PSS film. The down-shift in the highest occupied molecular orbital of PVK markedly reduced the hole injection barrier from PVK to quantum-dot (QD) layers in QD-light emitting diode (QD-LED) structures, resulting in superior electrical and electroluminescent characteristics for QD-LEDs. The influences of PANI:PSS thickness on the electronic structure of PVK and the performance of QD-LEDs are also discussed.
- OSTI ID:
- 22489301
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 2 Vol. 108; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of molecular weight on the efficiency of poly(N-vinylcarbazole)-based polymer light-emitting diodes
High-performance ultraviolet detection and visible-blind photodetector based on Cu{sub 2}O/ZnO nanorods with poly-(N-vinylcarbazole) intermediate layer
Hard x-ray photoelectron spectroscopy study on band alignment at poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/ZnO interface
Journal Article
·
Wed Nov 16 23:00:00 EST 2011
· Applied Physics Letters
·
OSTI ID:1033596
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
Hard x-ray photoelectron spectroscopy study on band alignment at poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/ZnO interface
Journal Article
·
Mon Oct 22 00:00:00 EDT 2012
· Applied Physics Letters
·
OSTI ID:22080509