Stable White Organic Light-emitting Diodes Enabled by New Materials with Reduced Excited State Lifetime

Technical Report · Tue Nov 26 04:00:00 EST 2019

OSTI ID:1631032

Kippelen, Bernard ^[1]; D'Urbano, Christopher ^[2]

---

1. Georgia Tech Research Corporation (GTRC), Atlanta, GA (United States); Georgia Institute of Technology
2. Georgia Tech Research Corporation (GTRC), Atlanta, GA (United States)

Through this program, novel blue-emitting molecules and layers based on wide-bandgap ambipolar hosts having a low energy difference between singlet and triplet excited-states were developed and their properties investigated using a wide variety of experimental and theoretical tools. We demonstrated that the efficient Förster resonant energy transfer from a novel host to a fluorescent guest leads to blue-emitting layers with a high photoluminescence quantum yield and reduced excited-state lifetime. Blue-emitting OLEDs having emissive layers with high IQE and improved device lifetime were demonstrated. Development of these novel hosts also yielded compounds that exhibited low concentration-dependent fluorescence quenching as well as high photoluminescence quantum yields, leading to the demonstration of highly efficient OLEDs using emissive layers using a single material - a significant advance towards the simplification of a device’s architecture.

• Research Organization: Georgia Tech Research Corporation (GTRC), Atlanta, GA (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE)
• DOE Contract Number: EE0008205
• OSTI ID: 1631032
• Report Number(s): DOE-GIT--0008205
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
Organic Light-Emitting Diodes