Multilayer thin-film back contact system for flexible photovoltaic devices on polymer substrates

摘要

A polymer substrate and back contact structure for a photovoltaic element, and a photovoltaic element include a CIGS photovoltaic structure, a polymer substrate having a device side at which the photovoltaic element can be located and a back side opposite the device side. A layer of dielectric is optionally formed at the back side of the polymer substrate. A metal structure is formed at the device side of the polymer substrate.

主权项

1. A photovoltaic element, comprising:
a polymer substrate having opposing a device and a back side; at least one stress-matching layer disposed on the back side of the polymer substrate, wherein said stress-matching layer comprises a dielectric layer; a metal structure disposed on the device side of the polymer substrate, the metal structure comprising:
a copper-based layer disposed on the device side of the polymer substrate, anda molybdenum-based cap layer disposed on the copper-based layer; a Copper-Indium-Gallium-Selenide (CIGS) photovoltaic structure disposed on the molybdenum-based cap layer.