Strong Internal and External Luminescence as Solar Cells Approach the Shockley–Queisser Limit
Strong Internal and External Luminescence as Solar Cells Approach the Shockley–Queisser Limit
Absorbed sunlight in a solar cell produces electrons and holes. But, at the open circuit condition, the carriers have no place to go. They build up in density and, ideally, they emit external fluorescence that exactly balances the incoming sunlight. Any additional non-radiative recombination impairs the carrier density buildup, limiting …