Solution-Phase Inclusion of Silver Into Chalcogenide Semiconductor Inks
AssigneeInternational Business Machines Corporation
InventorsPriscilla D. Antunez, Talia S. Gershon, Richard A. Haight, Teodor K. Todorov
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Abstract
Silver-containing absorbers for photovoltaic devices and techniques for fabrication thereof are provided. In one aspect, a method of forming an ink includes: mixing a silver halide and a solvent to form a first solution; mixing a metal, sulfur, and the solvent to form a second solution; combining the first solution and the second solution to form a precursor solution; and adding constituent components for an absorber material to the precursor solution to form the ink. Methods of forming an absorber film, a photovoltaic device, and the resulting photovoltaic device are also provided.
Claims20
A photovoltaic device, comprising:
- a substrate;
- an electrically conductive layer on the substrate;
- an absorber layer on the electrically conductive layer, wherein the absorber layer comprises silver and a halide, and wherein the silver and the halide are both present throughout the absorber layer;
- a buffer layer on the absorber layer;
- a transparent front contact on the buffer layer;
- and
- a metal grid on the transparent front contact.
A photovoltaic device, comprising:
- a substrate;
- an electrically conductive layer on the substrate;
- an absorber layer on the electrically conductive layer, wherein the absorber layer comprises CZT(S,Se) is a kesterite absorber material containing copper (Cu), zinc (Zn), tin (Sn), and at least one of sulfur (S) and selenium (Se), and wherein the absorber layer further comprises silver and a halide, and wherein the silver and the halide are both present throughout the absorber layer;
- a buffer layer on the absorber layer;
- a transparent front contact on the buffer layer;
- and
- a metal grid on the transparent front contact.
Dependencies are inferred from the claim text.