Quantum dot solar cells

The quantum dot solar cell concept is proposed as a scheme for increased solar cell efficiency. A theoretical model is presented for a practical p-i-n quantum dot solar cell, based on the self-organized InAs/GaAs system. The advantages of using the quantum dot in the active region for photon absorption in the long-wavelength part of the spectrum, leading to cell efficiency, is discussed. (C) 2001 American Institute of Physics.