NOVELTY - An upconversion photoluminescent solar concentrator device (10) comprises a waveguide (100) including a waveguide medium (102), and an upconversion chromophore (104) in contact with the waveguide medium, where the upconversion chromophore is configured to absorb an incident photon (106), where the upconversion chromophore is configured to emit an emitted photon (108), where the emitted photon has higher energy than the incident photon, where the upconversion chromophore has an absorption spectrum and an emission spectrum that do not overlap.    USE - As a upconversion photoluminescent solar concentrator device (claimed), for converting incident radiation into electrical energy.    ADVANTAGE - The lower layer waveguides of the device absorb and emit sequentially longer wavelengths of light. Upper layer waveguides absorb radiation so that these radiation wavelengths are not significantly seen by lower layers. Thus, effectively, the wavelengths of light absorbed by the upper layer chromophores are blocked to the lower layers. The chromophore radiation emission is tuned to the most efficient part of the power conversion spectrum of the corresponding type of photovoltaic device. The superimposed spectrum shows how the device can effectively create an efficient power conversion system.    DETAILED DESCRIPTION - An upconversion photoluminescent solar concentrator device (10) comprises a waveguide (100) including a waveguide medium (102), and an upconversion chromophore (104) in contact with the waveguide medium, where the upconversion chromophore is configured to absorb an incident photon (106), where the upconversion chromophore is configured to emit an emitted photon (108), where the emitted photon has higher energy than the incident photon, where the upconversion chromophore has an absorption spectrum and an emission spectrum that do not overlap. The upconversion chromophore is embedded in waveguide medium (preferably liquid), where the upconversion chromophore is H-aggregate or rare-earth ion.    DESCRIPTION OF DRAWING(S) - The figure shows a side view of upconversion photoluminescent solar concentrator device.    Upconversion photoluminescent solar concentrator device (10)    Waveguide (100)    Waveguide medium (102)    Upconversion chromophore (104)    Incident photon (106)    Emitted photon (108)