Renewable grid: Recovering electricity from heat storage hits 44% efficiency

https://news.umich.edu/renewable-grid-recovering-electricity-from-heat-storage-hits-44-efficiency/

"power conversion efficiency 44% (goal 50%) at 1435°C surpassing 37% achieved previously, closing in on theoretical maximum... optimizing semiconductor capturing photons (20-30% IR have enough energy generating electricity)... also collect photons above/ below semiconductor's range adding gold reflector (air bridge) beyond air gaps above/ below semiconductor giving energy another chance to be re-emitted, which regular solar cells cannot do"