Batteries: thermoelectric and photoelectric – Photoelectric – Cells
Reexamination Certificate
2004-02-19
2010-02-16
Nguyen, Nam X (Department: 1795)
Batteries: thermoelectric and photoelectric
Photoelectric
Cells
C136S262000, C136S265000, C427S216000, C427S217000, C427S381000, C106S286200
Reexamination Certificate
active
07663057
ABSTRACT:
An ink for forming CIGS photovoltaic cell active layers is disclosed along with methods for making the ink, methods for making the active layers and a solar cell made with the active layer. The ink contains a mixture of nanoparticles of elements of groups IB, IIIA and (optionally) VIA. The particles are in a desired particle size range of between about 1 nm and about 500 nm in diameter, where a majority of the mass of the particles comprises particles ranging in size from no more than about 40% above or below an average particle size or, if the average particle size is less than about 5 nanometers, from no more than about 2 nanometers above or below the average particle size. The use of such ink avoids the need to expose the material to an H2Se gas during the construction of a photovoltaic cell and allows more uniform melting during film annealing, more uniform intermixing of nanoparticles, and allows higher quality absorber films to be formed.
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Fidanza Jacqueline
Roscheisen Martin R.
Sager Brian M.
Yu Dong
Barton Jeffrey T.
Nanosolar, Inc.
Nguyen Nam X
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