OddGambit
OddGambit t1_ixwnmke wrote
Reply to comment by littleMAS in Record efficiency of 26.81% for large silicon solar cells by Wagamaga
Energy conversion is a tough game.
The upper limit for a single junction silicon cell is around 30% (can't remember the exact number and it depends on your assumptions), so we are already approaching the point of diminishing returns for this specific configuration.
Multijunction cells or TPV cells can go higher though, we just can't do them as cost efficiently yet.
Cool!
OddGambit t1_iy89emv wrote
Reply to comment by jonanzr in Rolls-Royce successfully tests hydrogen-powered jet engine | Britain's Rolls-Royce said it has successfully run an aircraft engine on hydrogen, a world aviation first that marks a major step towards proving the gas could be key to decarbonising air travel. by yourSAS
I would add that jets in particular are difficult for a green transition.
High power and portability requirements really limit your options.