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US 2012/0067407 A1Published application
Deposition processes and photovoltaic devices with polymeric precursors
AssigneePrecursor Energetics, Inc.
InventorsKyle L. Fujdala, Zhongliang Zhu, David Padowitz, Paul R. Markoff Johnson, Wayne A. Chomitz
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Abstract
Processes for making a solar cell by depositing various layers of components on a substrate and converting the components into a thin film photovoltaic absorber material. Processes of this disclosure can be used to control the stoichiometry of metal atoms in making a solar cell for targeting a particular concentration and providing a gradient of metal atom concentration. A selenium layer can be used in annealing a thin film photovoltaic absorber material.
Claims20
A process for making a thin film solar cell on a substrate comprising:
- (a) providing a substrate coated with an electrical contact layer;
- (b) depositing an initial layer of a first ink onto the contact layer of the substrate, wherein the first ink contains a first polymeric precursor compound that is enriched in the quantity of a Group 11 atom;
- (c) heating the initial layer;
- (d) depositing a main layer of a second ink onto the initial layer, wherein the second ink contains a second polymeric precursor compound that is deficient in the quantity of a Group 11 atom;
- and
- (e) heating the initial and main layers.
3 more elements
Dependencies are inferred from the claim text.