Samtliche Werke Volume 2 - 2 Angebote vergleichen

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This item is printed on demand. Paperback. 28 pages. Original publisher: Golden, Colo. : National Renewable Energy Laboratory, 2007 OCLC Number: (OCoLC)216922165 Subject: Photovoltaic cells -- Research. Excerpt: . . . during the CSS deposition process, and the CdTe source may be depleted of P after the first few depositions ( possibly by the second or third deposition ). Resolving this issue and determining whether any P has been incorporated in the films used for cell fabrication will require further investigation. A series of CdTe: P films has been forwarded to NREL for SIMS analysis. 5. 2 The Effect of CSS ( CdTe ) Ambient As indicated previously, the CdTe films 900 0. 80 utilized for the fabrication of high efficiency cells are deposited in an O-containing 2 ambient ( He O ). During the first year of this 2 875 project the effect of a N-O CSS ambient on 2 2 the characteristics of CdTe cells was 850 0. 70 studied. All devices discussed here were V fabricated using baseline fabrication FF m 825 conditions ( CBD-CdS; Cu-doped graphite OC back contact; CdCl heat treatment ). The V 2 only intentional process variation was the 800 0. 60 composition of the gas mixture during the CSS-CdTe deposition: The total pressure 775 was fixed at 10 torr, and the relative VOC FF amounts of N and O were adjusted to 2 2 750 0. 50 result in the following N O ratios: 9 1, 7 3, 2 2 9 1 7 3 5 5 1 9 5 5, and 1 9. The performance of these devices ( V and FF ) is shown in Fig. 6 OC N O 2 2 ( minimum of 3 cells per condition ). These results show a clear trend of improving V s OC Figure 6. The effect of the CSS-CdTe deposition and FF with increasing O ( decreasing N ) 2 2 and FF of CdTe solar cells ambient on the V OC partial pressure. Dark J-V characteristics for representative devices are shown in Fig. 7. The Ln ( J )-V shown on the left suggest that the device fabricated with CdTe with the lowest O partial pressure has a 2 higher dark current ( J ), which partially accounts for the lower V and FF for the cells O. . . This item ships from La Vergne,TN.

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U.S. Government, Jean Paul, Paperback, English-language edition, Pub by General Books LLC.