Professor Ching Tang (born 1947, Hong Kong) recently won the prestigious Wolf Prize.  Prof. Tang created two of the most active fields in organic materials, organic light emitting diodes (OLED) and organic photovoltaics (OPV). This spectacular work used some of the insights that Rice had characterized in organic crystals, to introduce a diode-type structure that in its subsequent development (by Tang and many others) has transformed the nature of optical displays. In 2011, OLEDs and OPVs span the range from fundamental scientific challenge to engineering improvement and industrial application. All this derives from Rice´s original insights and from Tang´s work in extending those concepts to deal with multi-component structures that can actually function as OPVs and OLEDs. The original paper by Tang (Applied Physics Letters, 1987), on organic electroluminescent diodes, is truly remarkable and constitutes testimony of the importance of Tang’s insights in combining the processes of photoexcitation and luminescence, charge separation and recombination, injection to and from electrodes, to produce these pioneering devices. Tang also pioneered the inverse process, in which photons incident on an organic crystal, generate electrons and holes that migrate to opposite electrodes, producing a current. This is the first workable example of a solar photovoltaic, based on organic materials.