3 years ago

Highly Efficient, Conventional, Fluorescent Organic Light-Emitting Diodes with Extended Lifetime

Highly Efficient, Conventional, Fluorescent Organic Light-Emitting Diodes with Extended Lifetime
Kwon-Hyeon Kim, Hyun-Gu Kim, Jang-Joo Kim
Highly efficient, yellow-fluorescent organic light-emitting diodes with a maximum external quantum efficiency exceeding 25.0% and extended lifetime are reported using iridium-complex sensitizers doped in an exciplex host. Energy transfer processes reduce the lifetime of the exciplex and excitons on the Ir complexes and enable an excited state to exist in a conventional fluorescent emitter, thereby increasing device lifetime. The device stability depends on the location of the excited state. Highly efficient, conventional, fluorescent organic light-emitting diodes with a maximum external quantum efficiency exceeding 25.0% are fabricated using iridium (Ir) complex sensitizers doped in an exciplex host. Energy-transfer processes reduce the lifetime of the exciplex and excitons in the Ir complex, and enable an excited state to be formed in a conventional fluorescent emitter, thereby increasing device lifetime.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/adma.201702159

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