High-efficiency red electrophosphorescence based on neutral bis(pyrrole)-diimine platinum(II) complex

Efficient red electroluminescence from the excimer or oligomer of neutral phosphorescent bis(pyrrole)-diimine Pt(II) complex has been achieved with maximum external quantum efficiency, luminous efficiency, power efficiency and brightness of 6.5%, 9.0 cd A(-1,) 4.0 lm W-1 and 11 100 cd m(-2), respectively.