Welcome to our group!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 >>  Highly Mismatched Alloys Highly mismatched alloys (HMAs) is a new class of semiconductors formed through alloying of distinctly different materials. HMAs have the electronic band structure drastically different from that of the component materials, offering unprecedented flexibility in controlling the band gap and the location of the conduction and valence band edges. Ideal Transparent Conductor for Full Spectrum PV Strong
absorption and reflection by high concentration free carrier gas is responsible
for low transparency of standard transparent conducting oxides (TCOs) in the
infrared (IR) region (l>1000 nm) and restricts the
applications of these materials to photovoltaics that do not utilize the IR part of the
solar spectrum. Maintaining low
resistivity and low free carrier absorption requires TCOs with the highest
possible charge carrier mobility.Recently
we have developed high mobility CdO based transparent conducting
oxides (TCOs) with exceptionally high conductivity (>104 S/cm) and transmission window in
the wavelength range from 400 to >1500 nm making this material an ideal
TCO for photovoltaics with low band gap absorbers. | News
|
Home |
