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Title: Method for depositing layers of high quality semiconductor material

Patent ·
OSTI ID:873931

Plasma deposition of substantially amorphous semiconductor materials is carried out under a set of deposition parameters which are selected so that the process operates near the amorphous/microcrystalline threshold. This threshold varies as a function of the thickness of the depositing semiconductor layer; and, deposition parameters, such as diluent gas concentrations, must be adjusted as a function of layer thickness. Also, this threshold varies as a function of the composition of the depositing layer, and in those instances where the layer composition is profiled throughout its thickness, deposition parameters must be adjusted accordingly so as to maintain the amorphous/microcrystalline threshold.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
DOE Contract Number:
ZAK-8-17619-09
Assignee:
United Solar Systems Corporation (Troy, MI)
Patent Number(s):
US 6274461
Application Number:
09/377,652
OSTI ID:
873931
Country of Publication:
United States
Language:
English

References (3)

From amorphous to microcrystalline silicon films prepared by hydrogen dilution using the VHF (70 MHz) GD technique journal May 1998
Effect of hydrogen dilution on the structure of amorphous silicon alloys journal September 1997
Optimization of hydrogenated amorphous silicon p–i–n solar cells with two-step i layers guided by real-time spectroscopic ellipsometry journal September 1998