Color in the corners: ITO-free white OLEDs with angular color stability.
Gaynor W, Hofmann S, Christoforo MG, Sachse C, Mehra S, Salleo A, McGehee MD, Gather MC, Lüssem B, Müller-Meskamp L, Peumans P, Leo K. Color in the corners: ITO-free white OLEDs with angular color stability. Adv Mater. 2013 Aug 07; 25(29):4006-13.