An organic light-emitting device (OLED) structure shows the emission layer which incorporates new charge-transporting organic phosphine oxide molecules (top right) as high triplet energy hosts for blue organometallic phosphors (blue dots).

An organic light-emitting device (OLED) structure shows the emission layer which incorporates new charge-transporting organic phosphine oxide molecules (top right) as high triplet energy hosts for blue organometallic phosphors (blue dots).