PHOTOVOLTAIC DEVICES AND METHOD OF MAKING
First Claim
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1. A photovoltaic device, comprising:
- a layer stack; and
an absorber layer disposed on the layer stack, wherein the absorber layer comprises selenium, and wherein an atomic concentration of selenium varies across a thickness of the absorber layer,wherein the photovoltaic device is substantially free of a cadmium sulfide layer.
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Abstract
A photovoltaic device is presented. The photovoltaic device includes a layer stack; and an absorber layer is disposed on the layer stack. The absorber layer comprises selenium, wherein an atomic concentration of selenium varies across a thickness of the absorber layer. The photovoltaic device is substantially free of a cadmium sulfide layer.
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Citations
27 Claims
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1. A photovoltaic device, comprising:
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a layer stack; and an absorber layer disposed on the layer stack, wherein the absorber layer comprises selenium, and wherein an atomic concentration of selenium varies across a thickness of the absorber layer, wherein the photovoltaic device is substantially free of a cadmium sulfide layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A photovoltaic device, comprising:
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a layer stack comprising; a transparent conductive oxide layer disposed on a support and a buffer layer disposed on the transparent conductive oxide layer, or a transparent conductive oxide layer disposed on a support, a buffer layer disposed on the transparent conductive oxide layer, and an interlayer disposed on the buffer layer; and an absorber layer disposed directly in contact with the layer stack, wherein the absorber layer comprises selenium, and wherein an atomic concentration of selenium varies across a thickness of the absorber layer. - View Dependent Claims (14, 15, 16, 17, 23, 24, 25, 26, 27)
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18. A method of making a photovoltaic device, comprising:
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providing a absorber layer on a layer stack, wherein the absorber layer comprises selenium, and wherein an atomic concentration of selenium varies across a thickness of the absorber layer, and wherein the photovoltaic device is substantially free of a cadmium sulfide layer. - View Dependent Claims (19, 20, 21, 22)
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Specification