It states that a single solar cell can only have an efficiency of around 32% for the most popular material, silicon. Even with some other semiconductor material with a higher band gap, peak ...

This means that to increase the efficiency of capture of solar radiation, we have to make hybrid ("multi-junction") cells ...

Techniques for Band Gap Engineering vary, including doping, the introduction of impurities into a semiconductor to alter its electrical properties; strain engineering, where stress is applied to ...