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Highly Efficient Phosphorescent Organic Light-Emitting Diodes Using Benzo[4′,5′]imidazo[2′,1′:2,3]imidazo[4,5,1-jk]carbazole as a Rigid and Effective Electron Acceptor in Bipolar Host
- Issue Date
- Aug-2023
- Publisher
- AMER CHEMICAL SOC
- Keywords
- bipolar host; phosphorescent device; greendevice; efficiency; efficiency roll-off
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.15, no.34, pp 40809 - 40816
- Pages
- 8
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 15
- Number
- 34
- Start Page
- 40809
- End Page
- 40816
- ISSN
- 1944-8244
1944-8252
- Abstract
- A novel bipolar host architecture was investigated toimprove theexternal quantum efficiency (EQE) of green phosphorescent organiclight-emitting diodes (PhOLEDs). The host was developed by incorporatingcarbazole as a hole-transport unit and fused rigid benzo[4 & PRIME;,5 & PRIME;]imidazo[2 & PRIME;,1 & PRIME;:2,3]imidazo[4,5, 1-jk]carbazole (BzICz) as a new electrontransport unit. The primary goal of the BzICz-based hostdesign was to achieve a high triplet energy and bipolar charge transportcharacteristics. The green PhOLEDs fabricated using the new BzICz and carbazole-based host demonstrated a high EQE of26.6% due to their high triplet energy and good bipolar charge transportingcharacteristics.
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Related Researcher
- Manulal, Raikwar Manish
- BioNano Technology (Department of Chemistry)