The efficiency of single junction solar cells is limited by their inability to absorb photons with an energy smaller than the bandgap. Here, the authors surpass the Shockley-Queisser limit by using an integrated hot-electron thermophotonic emitter to thermally up-convert sub-bandgap photons.
- Daniel J. Farrell
- Hassanet Sodabanlu
- Yoshitaka Okada
