A pyrosol process to deposit large-area SnO2 :F thin films and its use as a transparent conducting substrate for CdTe solar cells

Highly transparent, low-resistance SnO2:F films suitable as a substrate material for thin-film CdS/CdTe solar cells have been developed on 10x10, 30x60 and 82x71 cm2 glass substrates by an ultrasonic spray pyrolysis (pyrosol) process. Dimethyltin dichloride, NH4F and HF dissolved in water served as...

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Published inSolar energy materials and solar cells Vol. 67; no. 1-4; pp. 179 - 185
Main Authors VELUCHAMY, P, TSUJI, M, HANAFUSA, A, HIBINO, T, OMURA, K, NISHIO, T, ARAMOTO, T, HIGUCHI, H, KUMAZAWA, S, SHIBUTANI, S, NAKAJIMA, J, ARITA, T, OHYAMA, H
Format Conference Proceeding Journal Article
LanguageEnglish
Published Amsterdam Elsevier 2001
Subjects
Applied sciences
Energy
Exact sciences and technology
Natural energy
Photovoltaic conversion
Solar cells. Photoelectrochemical cells
Solar energy
Pyrolysis
Electrical conductivity
Semiconductor materials
Cadmium sulfide
Spray coating
Absorption spectrum
Solar cell
Thickness
Substrate
Cadmium tellurides
Tin oxide
Manufacturing
Aqueous solution
Performance
Film resistor
Transparent material
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Summary:Highly transparent, low-resistance SnO2:F films suitable as a substrate material for thin-film CdS/CdTe solar cells have been developed on 10x10, 30x60 and 82x71 cm2 glass substrates by an ultrasonic spray pyrolysis (pyrosol) process. Dimethyltin dichloride, NH4F and HF dissolved in water served as the source solution. A fine spray of the source solution has been transported using air as a carrier gas onto hot glass plates in a belt furnace maintained at 500-530 C. A high growth rate of > 15 nm/s and a high throughput of 3 min/glass plate (82x71 cm2 size) have been achieved with films showing greater uniformity, low sheet resistance and high optical transmission. Typical films exhibited a thickness of 500 nm, a sheet resistance of 8.1 OHM/sq, a mobility of 43.8 cm2/Vs and a donor concentration of 3.5x1020 cm-3. A thin-film CdS/CdTe solar cell fabricated on a 30x60 cm2 SnO2:F transparent conducting substrate exhibited a solar energy conversion efficiency maximum of 14.95% for 1 cm2 cell and an average efficiency of 14.24% for 178 isolated 1 cm2 cells. 25 refs.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0927-0248
1879-3398
DOI:10.1016/S0927-0248(00)00279-8