AFM, Micro-Pl, and PV Analyses of Culn/Sub 1-X/Ga/Sub X/S/Sub 2/ Thin Films Solar Cells on Stainless Steel Foil

Secondary Author(s)

Ghongadi, Shantinath; Pandit, Mandar; Kadam, Ankur; Jahagirdar, Anant; Gade, Vivek

Keywords

CIGS2 thin films; Solar cells; Magnetron sputtering; Sulfurization; Photoluminescence; Stainless steel substrates; Solar cell efficiency

Abstract

A dual-chamber, large-area magnetron-sputtering unit was fabricated. CuIn/sub 1-x/Ga/sub x/S/sub 2/ (CIGS2) thin films were prepared by sulfurization of DC magnetron-sputtered CuGa/In precursor on stainless steel foil substrates in Ar:H/sub 2/S(4%) mixture at 475/spl deg/C. CIGS2 thin films grew with chalcopyrite CuIn/sub 0.7/Ga/sub 0.3/S/sub 2/ phase with a = 5.67 /spl Aring/ and c = 11.34 /spl Aring/ and preferred {112} orientation. In homogeneous broadening, and variation of peak position and amplitude of microPL signal were probably caused by rough morphology and variation in the defect chemistry. Best efficiencies of CIGS2 solar cell on SS flexible foil measured at NREL and NASA GRC were 10.4% (AM 1.5) and 8.84% AM 0 respectively.

Date Published

5-19-2002

Identifiers

574

Subjects

Thin films; Solar cells; Photoluminescence; Stainless steel; Solar energy; Solar cells

Local Subjects

PV Cells

Type

Text; Document

Collection

FSEC Energy Research Center® Collection

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