Acid Etches - Explore the Science & Experts | ideXlab

Scan Science and Technology

Contact Leading Edge Experts & Companies

Acid Etches

The Experts below are selected from a list of 11070 Experts worldwide ranked by ideXlab platform

Acid Etches – Free Register to Access Experts & Abstracts

Chen Qian – One of the best experts on this subject based on the ideXlab platform.

  • effects of nitric phosphoric Acid Etches on properties of cdte thin films and back contacts of cdte solar cells
    Chinese Journal of Materials Research, 2007
    Co-Authors: Chen Qian
    Abstract:

    The CdTe thin films were etched with a mixture of nitric-phosphoric Acid in water (NP), and then several kinds of back contact materials were deposited respectively by co-evaporation in this paper. The effect of nitric-phosphoric Acid pretreatment on material properties and back contact formation of CdTe solar cells were investigated. The results show that the chemical etching produces a Te rich layer on the back surface of CdTe films and on grain boundaries, and this readily leads to the reaction with Cu or Cu-containing back contact materials and the formation of CuxTe after annealing. When etched under optimum conditions and used ZnTe/ZnTe:Cu as back-contact materials, the small area CdTe solar cells show high performance.

P Sheldon – One of the best experts on this subject based on the ideXlab platform.

  • effect of nitric phosphoric Acid Etches on material properties and back contact formation of cdte based solar cells
    Journal of Vacuum Science and Technology, 1999
    Co-Authors: David W Niles, F S Hasoon, Richard Matson, P Sheldon
    Abstract:

    Forming a low-resistance contact to p-type CdTe is a critical issue for successful commercialization of CdTe-based photovoltaic devices. One solution to this problem has been to incorporate surface pretreatments to facilitate contact formation. In this article, the effects of a nitric–phosphoric (NP) Acid pretreatment on material properties and device performance are investigated for polycrystalline CdTe-based devices. We demonstrate that the NP Acid pretreatment, when applied to CdTe thin films, forms a thick, highly conductive Te layer on the back surface of the film and on exposed grain boundaries. When etched under optimal conditions, this results in CdS/CdTe devices with reduced series resistance and enhanced performance. On the other hand, we find that the NP etch preferentially Etches grain boundaries. Overetching can result in complete device failure by forming shunt paths that extend to the heterointerface. Therefore, carefully controlling the etch concentration and duration is critical to optimi…

David W Niles – One of the best experts on this subject based on the ideXlab platform.

  • effect of nitric phosphoric Acid Etches on material properties and back contact formation of cdte based solar cells
    Journal of Vacuum Science and Technology, 1999
    Co-Authors: David W Niles, F S Hasoon, Richard Matson, P Sheldon
    Abstract:

    Forming a low-resistance contact to p-type CdTe is a critical issue for successful commercialization of CdTe-based photovoltaic devices. One solution to this problem has been to incorporate surface pretreatments to facilitate contact formation. In this article, the effects of a nitric–phosphoric (NP) Acid pretreatment on material properties and device performance are investigated for polycrystalline CdTe-based devices. We demonstrate that the NP Acid pretreatment, when applied to CdTe thin films, forms a thick, highly conductive Te layer on the back surface of the film and on exposed grain boundaries. When etched under optimal conditions, this results in CdS/CdTe devices with reduced series resistance and enhanced performance. On the other hand, we find that the NP etch preferentially Etches grain boundaries. Overetching can result in complete device failure by forming shunt paths that extend to the heterointerface. Therefore, carefully controlling the etch concentration and duration is critical to optimi…