Researchers at MIT think so. In a paper published this week in Nature Energy researchers describe building a working solar thermophotovoltaic device, or STPV. The STPV solar cell has a layer that absorbs heat and light from sunlight and reflects it back out as light, which is then captured by a nearby solar cell and turned into power. The light emitted by the device is calibrated to be the perfect wavelength for the solar cell, making it function at peak efficiency. Normally, a solar cell or photovoltaic device just convert light into electricity without going through the intermediate step with heat.