Biaxially-Textured Photovoltaic Film Crystal Silicon on Ion Beam Assisted Deposition CaF2 Seed Layers on Glass

Groves, James R.; Li, Joel B.; Clemens, Bruce M.; LaSalvia, Vincenzo; Hasoon, Falah; Branz, Howard M.; Teplin, Charles W.

doi:10.1039/c2ee21097e

Biaxially-Textured Photovoltaic Film Crystal Silicon on Ion Beam Assisted Deposition CaF2 Seed Layers on Glass

Journal Article · Tue May 01 04:00:00 EDT 2012 · Energy & Environmental Science

DOI:https://doi.org/10.1039/c2ee21097e· OSTI ID:1048589

Groves, James R.; Li, Joel B.; Clemens, Bruce M.; LaSalvia, Vincenzo; Hasoon, Falah; Branz, Howard M.; Teplin, Charles W.

We grow biaxially textured heteroepitaxial crystal silicon (c-Si) films on display glass as a low-cost photovoltaic material. We first fabricate textured CaF{sub 2} seed layers using ion-beam assisted deposition, then coat the CaF{sub 2} with a thin, evaporated epitaxial Ge buffer and finally deposit heteroepitaxial silicon on the Ge. The silicon is grown by hot-wire chemical vapor deposition, a high-rate, scalable epitaxy technology. Electron and X-ray diffraction confirm the biaxial texture of the CaF{sub 2} and epitaxial growth of the subsequent layers. Transmission electron microscopy reveals columnar silicon grains about 500 nm across. We fabricate a proof-of-concept epitaxial film c-Si solar cell with an open circuit voltage of 375 mV that is limited by minority carrier lifetime.

Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)

DOE Contract Number:: AC36-08GO28308

OSTI ID:: 1048589

Report Number(s):: NREL/JA-5200-55506

Journal Information:: Energy & Environmental Science, Journal Name: Energy & Environmental Science Journal Issue: 5 Vol. 5; ISSN 1754-5692

Country of Publication:: United States

Language:: English

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Related Subjects

14 SOLAR ENERGY
36 MATERIALS SCIENCE
BUFFERS
CARRIER LIFETIME
CHEMICAL VAPOR DEPOSITION
DEPOSITION
ELECTRIC POTENTIAL
ELECTRONS
EPITAXY
GLASS
ION BEAMS
SEEDS
SILICON
SOLAR CELLS
TEXTURE
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
crystal silicon
film crystal silicon
photovoltaic material
solar energy

Biaxially-Textured Photovoltaic Film Crystal Silicon on Ion Beam Assisted Deposition CaF2 Seed Layers on Glass

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