Exciplex route to white organic light emitting diodes: The role of a spacer layer

https://phys.org/news/2024-01-exciplex-route-white-emitting-diodes.html

"Exciplex emission is at interface of 2 different non-luminescent materials cheaper than fluorescent or phosphorescent emitter materials... blue electroluminescence from blend layer of hole transport and electron transport materials... ambipolar spacer layer between blue exciplex, and blue exciplex with yellow dopant... balanced carrier flow to both blue emitting unit and yellow emitting unit ensured white emission... fewer layers than standard white OLED with red, green and blue emitting layers