Overcoming degradation mechanisms in CdTe solar cells: First annual report, August 1998--August 1999

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The authors have studied the importance of chemical processes for the stability of CdTe solar cells, in particular, diffusion in the ohmic contact/absorber junction regions. Both whole cells and test systems containing only the ohmic contact and the absorber are used. They found several experimental methods to be useable tools to follow the effects of impurity diffusion on the CdTe grain boundaries, grain bulk, and surface. In addition, they have explored alternative contacting schemes. The first year of activities led to the following tentative conclusions: Grain boundaries in CdTe/CdS cells are NOT fully passivated and are expected to be electrically ... continued below

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Cahen, D.; Gartsman, K.; Hodes, G.; Rotlevy, O.; Visoly-Fisher, I, & Dobson, K. February 28, 2000.

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Description

The authors have studied the importance of chemical processes for the stability of CdTe solar cells, in particular, diffusion in the ohmic contact/absorber junction regions. Both whole cells and test systems containing only the ohmic contact and the absorber are used. They found several experimental methods to be useable tools to follow the effects of impurity diffusion on the CdTe grain boundaries, grain bulk, and surface. In addition, they have explored alternative contacting schemes. The first year of activities led to the following tentative conclusions: Grain boundaries in CdTe/CdS cells are NOT fully passivated and are expected to be electrically active; There appears to be fast ionic diffusion in the vicinity of the Cu/HgTe/graphite back-contact, possibly enhanced by grain boundary diffusion; The macroscopic response to stress is different for cells with identical back-contact, but from different manufacturers. Different factors and/or different reactions to identical factors are possibly at work here; and Ni-P appears to be a promising back-contact material.

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  • Other Information: PBD: 28 Feb 2000

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  • Report No.: NREL/SR-520-27932
  • Grant Number: AC36-99GO10337
  • DOI: 10.2172/754634 | External Link
  • Office of Scientific & Technical Information Report Number: 754634
  • Archival Resource Key: ark:/67531/metadc710520

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  • February 28, 2000

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  • Sept. 12, 2015, 6:31 a.m.

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  • March 28, 2016, 8:39 p.m.

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Cahen, D.; Gartsman, K.; Hodes, G.; Rotlevy, O.; Visoly-Fisher, I, & Dobson, K. Overcoming degradation mechanisms in CdTe solar cells: First annual report, August 1998--August 1999, report, February 28, 2000; Golden, Colorado. (digital.library.unt.edu/ark:/67531/metadc710520/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.