Characterization of Amorphous Silicon Advanced Materials and PV Devices: Final Technical Report, 15 December 2001--31 January 2005
The major objectives of this subcontract have been: (1) understand the microscopic properties of the defects that contribute to the Staebler-Wronski effect to eliminate this effect, (2) perform correlated studies on films and devices made by novel techniques, especially those with promise to improve stability or deposition rates, (3) understand the structural, electronic, and optical properties of films of hydrogenated amorphous silicon (a-Si:H) made on the boundary between the amorphous and microcrystalline phases, (4) search for more stable intrinsic layers of a-Si:H, (5) characterize the important defects, impurities, and metastabilities in the bulk and at surfaces and interfaces in a-Si:H films and devices and in important alloy systems, and (6) make state-of-the-art plasma-enhanced chemical vapor deposition (PECVD) devices out of new, advanced materials, when appropriate. All of these goals are highly relevant to improving photovoltaic devices based on a-Si:H and related alloys. With regard to the first objective, we have identified a paired hydrogen site that may be the defect that stabilizes the silicon dangling bonds formed in the Staebler-Wronski effect.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC36-99-GO10337
- OSTI ID:
- 860399
- Report Number(s):
- NREL/SR-520-38678; ADJ-2-30630-23; TRN: US200524%%139
- Resource Relation:
- Related Information: Work performed by the University of Utah, Salt Lake City, Utah
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
08 HYDROGEN
14 SOLAR ENERGY
ALLOY SYSTEMS
ALLOYS
CHEMICAL VAPOR DEPOSITION
DEFECTS
DEPOSITION
HYDROGEN
IMPURITIES
OPTICAL PROPERTIES
SILICON
STABILITY
PV
MODULE
AMORPHOUS SILICON
ADVANCED MATERIALS
STAEBLER-WRONSKI EFFECT
PLASMA-ENHANCED CHEMICAL VAPOR DEPOSITION (PECVD)
DEVICES
PHOTOCONDUCTIVITY
Solar Energy - Photovoltaics