Sodium-doped molybdenum targets for controllable sodium incorporation in CIGS solar cells
Subtitle: preprint
By: Lorelle M. Mansfield ... [et al.].
Contributors: National Renewable Energy Laboratory (U.S.); Climax Molybdenum Technology Center; IEEE Photovoltaic Specialists Conference (37th : 2011 : Seattle, Wash.)
Series: NREL/CP -- 5200-50722; Conference paper (National Renewable Energy Laboratory (U.S.)) -- NREL/CP-5200-50722.
Publisher: National Renewable Energy Laboratory
Published: 2011
Place of publication: Golden, Colo.]
Language: eng
Format: [electronic resource] :
Subjects: Photovoltaic cells; Research; Solar cells; Design and construction; Sodium; Molybdenum
Other titles: Sodium-doped molybdenum targets for controllable sodium incorporation in Cu(In,Ga)Se2 solar cells; Na-doped Mo targets for controllable Na incorporation in copper indium gallium diselenide solar cells
Description: The efficiency of Cu(In,Ga)Se2 (CIGS) solar cells is enhanced when Na is incorporated in the CIGS absorber layer. This work examines Na incorporation in CIGS utilizing Na-doped Mo sputtered from targets made with sodium molybdate-doped (MONA) powder. Mo:Na films with varying thicknesses were sputtered onto Mo-coated borosilicate glass (BSG) or stainless steel substrates for CIGS solar cells. By use of this technique, the Na content of CIGS can be varied from near-zero to higher than that obtained from a soda-lime glass (SLG) substrate. Targets and deposition conditions are described. The doped Mo films are analyzed, and the resulting devices are compared to devices fabricated on Mo-coated SLG as well as Mo-coated BSG with NaF. Completed devices utilizing MONA exceeded 15.7% efficiency without anti-reflective coating, which was consistently higher than devices prepared with the NaF precursor. Strategies for minimizing adhesion difficulties are presented.
Notes: Title from title screen (viewed August 8, 2011).

"July 2011."

"Presented at the 37th IEEE Photovoltaic Specialists Conference (PVSC 37), Seattle, Washington, June 19-24, 2011."

Includes bibliographical references (p. 5-6).

DE-AC36-08GO28308

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