NREL's New Cell Exceeds Previous Efficiency Record by More Than 8 Percentage Points, Unlocking More Efficient Thermal Energy Storage
NREL’s New Cell Exceeds Previous Efficiency Record by More Than 8 Percentage Points, Unlocking More Efficient Thermal Energy Storage Applications
A new photovoltaic cell developed by NREL far surpasses the previous, 32% world-record efficiency for TPVs. The new device, developed for a joint demonstration with the Massachusetts Institute of Technology of an electric-energy storage concept, is described inThe device developed by the NREL/MIT team consists of two light-absorbing layers, backed by a highly reflective gold mirror layer and then a heat sink.
“High efficiency is crucial to the engineering and economic viability of TPV systems, and this new 41% record efficiency is a giant step toward making this thermal energy grid storage concept a reality,” said Dan Friedman, an NREL author on the paper.Significantly, a TPV device with 40% efficiency can convert heat to electricity at greater efficiency than conventional steam turbines, such as those used in coal or nuclear power plants.
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