Title: Band gap energies of semiconductors

- [Image: Periodic table]
- [Image: arrow pointing down]
- Increasing band gap energy
- Decreasing band gap energy
- Increasing metallicity
- Decreasing metallicity
Q: giu
A: Decreasing band gap energy; Increasing metallicity
Credits: source http://www.pveducation.org/sites/default/files/PVCDROM/PN-Junction/Images/PERI-S.gif