Towards see-through displays:: Fully transparent thin-film transistors driving transparent organic light-emitting diodes

Entirely transparent pixels composed of monolithically integrated transparent organic light-emitting diodes driven by transparent thin-film transistors are presented. With an average transmittance of more than 70 % (see figure and inside cover) in the visible part of the spectrum (400-750 nm), the presented active pixels pave the way to the realization Of fully transparent active-matrix displays. Low processing temperatures mean that flexible transparent displays may be feasible.