Full-spectrum Solar Cell

The newly discovered narrow bandgap of InN Eg~0.7 has extended the spectral range of the InGaN alloy system into the infrared region. That makes InGaN an excellent material for high-efficiency multi-junction (tandem) solar cells. As shown in the picture below, the bandgap of the InGaN alloy matches the solar spectrum (Air Mass 1.5) almost perfectly [1]...more >>

"Multiband" Solar Cell

The intermediate band acts as a “stepping stone,” allowing absorption of photons at three different energy levels, corresponding to the three different band gaps.  In particular, low-energy photons are captured that would pass through a conventional solar cell...more >>