Superstructures and multijunction cells for high efficiency energy conversion
Abstract
Potential applications of superlattices to photovoltaic structures are discussed. A single-bandgap, multijunction cell with selective electrodes for lateral transport of collected carriers is proposed. The concept is based on similar doping superlattice (NIPI) structures. Computer simulations show that by reducing bulk recombination losses, the spectral response of such cells is enhanced, particularly for poor quality materials with short diffusion lengths. Dark current contributions of additional junctions result in a trade-off between short-circuit current and open-circuit voltage as the number of layers is increased. One or two extra junctions appear to be optimal.
- Publication:
-
IN: Photovoltaic Specialists Conference
- Pub Date:
- 1985
- Bibcode:
- 1985pvsp.conf..157W
- Keywords:
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- Computerized Simulation;
- Energy Conversion Efficiency;
- Energy Gaps (Solid State);
- Photovoltaic Cells;
- Short Circuit Currents;
- Superlattices;
- Carrier Density (Solid State);
- Doped Crystals;
- Minority Carriers;
- Radiation Tolerance;
- Electronics and Electrical Engineering