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FASST® Reactive Transfer Printing for Morphology and Structural Control of Liquid Precursor based Inorganic Reactants

Published online by Cambridge University Press:  21 March 2011

P. Hersh
Affiliation:
HelioVolt Corporation, 8201 E. Riverside Dr., Austin, TX 78744, U.S.A.
M. Taylor
Affiliation:
HelioVolt Corporation, 8201 E. Riverside Dr., Austin, TX 78744, U.S.A.
B. Sang
Affiliation:
HelioVolt Corporation, 8201 E. Riverside Dr., Austin, TX 78744, U.S.A.
M. van Hest
Affiliation:
National Renewable Energy Laboratory, Golden, CO 80401, U.S.A.
J. Nekuda
Affiliation:
National Renewable Energy Laboratory, Golden, CO 80401, U.S.A.
A. Miedaner
Affiliation:
National Renewable Energy Laboratory, Golden, CO 80401, U.S.A.
C. Curtis
Affiliation:
National Renewable Energy Laboratory, Golden, CO 80401, U.S.A.
J. Leisch
Affiliation:
National Renewable Energy Laboratory, Golden, CO 80401, U.S.A.
D. Ginley
Affiliation:
National Renewable Energy Laboratory, Golden, CO 80401, U.S.A.
B.J. Stanbery
Affiliation:
HelioVolt Corporation, 8201 E. Riverside Dr., Austin, TX 78744, U.S.A.
L. Eldada
Affiliation:
HelioVolt Corporation, 8201 E. Riverside Dr., Austin, TX 78744, U.S.A.
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Abstract

Field-Assisted Simultaneous Synthesis and Transfer (FASST®) process offers a controllable and cost-effective method to produce Copper Indium Gallium Selenide (CIGS) films for high efficiency photovoltaic devices. In the first stage of the two-stage FASST® process two separate precursor films are formed, one deposited on the substrate and the other on a reusable printing plate. In the second stage, the precursors are brought into intimate contact and rapidly reacted under pressure in the presence of an applied electrostatic field, effectively creating a sealed micro-reactor that ensures high material utilization efficiency, direct control of reaction pressure, and low thermal budget. The unique ability to control both precursor films independently allows for composition and deposition technique optimization, eliminating pre-reaction prior to the synthesis of CIGS. This flexibility has proven immensely valuable as is demonstrated in the results of depositing the two-reactant films by various combinations of low-cost solution-based and conventional vacuum-based physical vapor deposition techniques, producing in several minutes' high quality “hybrid” CIGS with large grains on the order of several microns. Cell efficiencies as high as 12.2% have been achieved using the FASST® method.

Type
Research Article
Copyright
Copyright © Materials Research Society 2009

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