Abstract
PVK is a prototypical host for polymer based phosphorescent OLEDs. We report the photo (PL) and electroluminescence (EL) properties of phosphorescent organic light emitting diodes (OLEDs) based on poly(vinylcarbazole) (PVK) derivatives doped with cyclometalated Ir(III) complexes. To allow for stable morphology as well as photopatternability, both the host and guest materials were rendered cross-linkable by attaching a cross linking oxetane moiety. Regarding the PVK matrix we also used a new derivative (PVK-Cin) of poly(vinylcarbazole) (PVK) that was prepared by tethering cinnamate pendants to the carbazole group through an octylene spacer. While the use of the oxcetane moieties attached to the ligands of the Ir complex slightly improves the luminescence efficiency, the use of oxcetane derivatized PVK and the associated catalyst result in poor performance. In contrast, the use of the (catalyst free) cinnamate derivatized PVK results in high efficiency cross-linked PLEDs with efficiency higher than 4.5 cd/A. Photopatternability of the new PVK based-polymer was investigated through photocrosslinking reaction under UV light illumination (= 254 nm). The blends of PVK-Cin and a soluble (Btp) 2Ir(III)(acac)Ox were employed for studying a photocrosslinking behavior. We observed that PVK-Cin readily undergoes 2π + 2π cycloaddition when exposed to the UV light (λmax = 254 nm) at 110 °C without photoinitiator.
| Original language | English |
|---|---|
| Title of host publication | Materials Research Society Symposium Proceedings |
| Pages | 203-211 |
| Number of pages | 9 |
| Volume | 1129 |
| Publication status | Published - 2009 Nov 23 |
| Event | Materials and Devices for Smart Systems III - 2008 MRS Fall Meeting - Boston, MA, United States Duration: 2008 Dec 1 → 2008 Dec 4 |
Other
| Other | Materials and Devices for Smart Systems III - 2008 MRS Fall Meeting |
|---|---|
| Country | United States |
| City | Boston, MA |
| Period | 08/12/1 → 08/12/4 |
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ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanical Engineering
- Mechanics of Materials
Cite this
Cross linkable phosphorescent polymer-LEDs based on a soluble new iridium complex ((Btp)2Ir(III)(acac)-Ox). / Yu, Young Jun; Solomeshch, Olga; Medvedev, Vladislav; Razin, Alexey; Tessler, Nir; Kim, Kyu Nam; Choi, Dong Hoon; Jin, Jung.
Materials Research Society Symposium Proceedings. Vol. 1129 2009. p. 203-211.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Cross linkable phosphorescent polymer-LEDs based on a soluble new iridium complex ((Btp)2Ir(III)(acac)-Ox)
AU - Yu, Young Jun
AU - Solomeshch, Olga
AU - Medvedev, Vladislav
AU - Razin, Alexey
AU - Tessler, Nir
AU - Kim, Kyu Nam
AU - Choi, Dong Hoon
AU - Jin, Jung
PY - 2009/11/23
Y1 - 2009/11/23
N2 - PVK is a prototypical host for polymer based phosphorescent OLEDs. We report the photo (PL) and electroluminescence (EL) properties of phosphorescent organic light emitting diodes (OLEDs) based on poly(vinylcarbazole) (PVK) derivatives doped with cyclometalated Ir(III) complexes. To allow for stable morphology as well as photopatternability, both the host and guest materials were rendered cross-linkable by attaching a cross linking oxetane moiety. Regarding the PVK matrix we also used a new derivative (PVK-Cin) of poly(vinylcarbazole) (PVK) that was prepared by tethering cinnamate pendants to the carbazole group through an octylene spacer. While the use of the oxcetane moieties attached to the ligands of the Ir complex slightly improves the luminescence efficiency, the use of oxcetane derivatized PVK and the associated catalyst result in poor performance. In contrast, the use of the (catalyst free) cinnamate derivatized PVK results in high efficiency cross-linked PLEDs with efficiency higher than 4.5 cd/A. Photopatternability of the new PVK based-polymer was investigated through photocrosslinking reaction under UV light illumination (= 254 nm). The blends of PVK-Cin and a soluble (Btp) 2Ir(III)(acac)Ox were employed for studying a photocrosslinking behavior. We observed that PVK-Cin readily undergoes 2π + 2π cycloaddition when exposed to the UV light (λmax = 254 nm) at 110 °C without photoinitiator.
AB - PVK is a prototypical host for polymer based phosphorescent OLEDs. We report the photo (PL) and electroluminescence (EL) properties of phosphorescent organic light emitting diodes (OLEDs) based on poly(vinylcarbazole) (PVK) derivatives doped with cyclometalated Ir(III) complexes. To allow for stable morphology as well as photopatternability, both the host and guest materials were rendered cross-linkable by attaching a cross linking oxetane moiety. Regarding the PVK matrix we also used a new derivative (PVK-Cin) of poly(vinylcarbazole) (PVK) that was prepared by tethering cinnamate pendants to the carbazole group through an octylene spacer. While the use of the oxcetane moieties attached to the ligands of the Ir complex slightly improves the luminescence efficiency, the use of oxcetane derivatized PVK and the associated catalyst result in poor performance. In contrast, the use of the (catalyst free) cinnamate derivatized PVK results in high efficiency cross-linked PLEDs with efficiency higher than 4.5 cd/A. Photopatternability of the new PVK based-polymer was investigated through photocrosslinking reaction under UV light illumination (= 254 nm). The blends of PVK-Cin and a soluble (Btp) 2Ir(III)(acac)Ox were employed for studying a photocrosslinking behavior. We observed that PVK-Cin readily undergoes 2π + 2π cycloaddition when exposed to the UV light (λmax = 254 nm) at 110 °C without photoinitiator.
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M3 - Conference contribution
AN - SCOPUS:70449625547
SN - 9781605111018
VL - 1129
SP - 203
EP - 211
BT - Materials Research Society Symposium Proceedings
ER -