BASF and OSRAM Opto Semiconductors have developed a highly efficient white organic light-emitting diode (OLED): for the first time an OLED not only is able to achieve a light yield of over 60 lumens per watt (lm/W), but also, at the same time, meets the international Energy Star SSL Standard with regard to color requirements. Lighting efficiency on this scale had been achieved previously. Lighting efficiency describes the ratio of luminous flux given off by a lamp to the amount of power consumed...