<div dir="ltr"><a href="https://news.mit.edu/2022/thermal-heat-engine-0413">https://news.mit.edu/2022/thermal-heat-engine-0413</a><br><div><br></div><div>Thermophotovoltaic, converts 1900-2400C source photons to electricity at >40% efficiency.</div><div><br></div><div>-- rec --</div><div><br></div></div>