Solar energy is a favoured contender for a long-term replacement for fossil fuels. A Solar Cells, often known as a photovoltaic (PV) cell, transforms sunlight into energy directly. However, the conversion efficiency has not been high enough to allow Solar Cells to be widely used.
Thermodynamic parameters, such as temperature and entropy, set a basic constraint on the maximum efficiency of PV devices (a measure of disorder in a system). The entropy of the blackbody radiation, which is commonly attributed to sunlight, imposes this restriction, known as the Landsberg limit. The Landsberg limit is commonly regarded as the most universal efficiency limit for any solar converter.
Researchers Andrei Sergeev of the US Army Research Laboratory and Kimberly Sablon of Army Futures Command and Texas A&M University propose a way to break the SQ limit by utilising “nonreciprocal photonic structures” that can drastically reduce emission from a PV converter without affecting its total light absorption in a new study published in the Journal of Photonics for Energy (JPE).