Full spectrum utilization of sunlight using thermophotovoltaics

Abstract

Effective solar energy utilization is extremely important in realizing a carbon neutral society. Therefore, a power generation technology that can utilize the full spectrum of sunlight is required. Solar energy conversion based on thermophotovoltaics (TPVs), called solar-TPV, potentially enables the use of the full spectrum of sunlight and high-efficiency conversion with single-junction cells. Here, we introduce a technology for controlling the thermal radiation spectrum (which is important for achieving high-efficiency solar-TPV), as well as the results of experiments using a designed solar-TPV system. In addition, we describe the prospects for advanced solar energy utilization by solar-TPV.