SOLAR CELL WITH EPITAXIALLY GROWN QUANTUM DOT MATERIAL
First Claim
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1. A monolithic, multijunction, semiconductor photovoltaic solar cell comprising:
- a plurality of subcells disposed in series, each subcell having formed therein a p-n junction or a p-i-n junction, the plurality of subcells having a quantum dot subcell, the quantum dot subcell being a subcell with strained epitaxially-grown semiconductor layers that include self-assembled quantum dots, the quantum dot subcell being pseudomorphically grown on another subcell.
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Abstract
A monolithic semiconductor photovoltaic solar cell comprising a plurality of subcells disposed in series on an electrically conductive substrate. At least one subcell of the plurality of subcells includes an epitaxially grown self-assembled quantum dot material. The subcells are electrically connected via tunnel junctions. Each of the subcells has an effective bandgap energy. The subcells are disposed in order of increasing effective bangap energy, with the subcell having the lowest effective bandgap energy being closest to the substrate. In certain cases, each subcell is designed to absorb a substantially same amount of solar photons.
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Citations
13 Claims
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1. A monolithic, multijunction, semiconductor photovoltaic solar cell comprising:
a plurality of subcells disposed in series, each subcell having formed therein a p-n junction or a p-i-n junction, the plurality of subcells having a quantum dot subcell, the quantum dot subcell being a subcell with strained epitaxially-grown semiconductor layers that include self-assembled quantum dots, the quantum dot subcell being pseudomorphically grown on another subcell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A monolithic, multijunction, semiconductor photovoltaic solar cell comprising:
a plurality of subcells disposed in series, each subcell having formed therein a p-n junction or a p-i-n junction, the plurality of subcells having a quantum dot subcell, the quantum dot subcell being a subcell with strained epitaxially-grown semiconductor layers that include self-assembled quantum dots.
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