Examining the role of ultra-thin atomic layer deposited metal oxide barrier layers on CdTe/ITO interface stability during the fabrication of solution processed nanocrystalline solar cells

Benjamin Chambers, Brandon Macdonald, Mihail Ionescu, Alec Deslandes, Jamie Quinton, Jacek Jasieniak, Gunther Andersson

    Research output: Contribution to journalArticle

    17 Citations (Scopus)

    Abstract

    Solution processed CdTe layers are a potentially low-cost alternative for use in thin-film solar cells. We have recently reported the use of such nanocrystalline layers within ITO/CdTe/ZnO/Al device architectures. One key concern with this type of device structure is the possibility of atomic scale interdiffusion between the ITO and CdTe layers, which can result in deleterious n-type doping of the CdTe layer. Rutherford Backscattering has been used to study the chemical composition across the ITO/CdTe interface as a function of thermal annealing temperature. Through these measurements we verify that interdiffusion is observed across the interface for annealing temperatures above 200 °C, and the extent of interdiffusion increases with temperature. Ultra-thin alumina, zirconia and titania layers deposited between the ITO and CdTe layers have been studied for their potential to act as a diffusion barrier. All investigated barriers successfully suppress interdiffusion. The outcomes of these compositional studies are directly compared to solar cells fabricated under analogous processing conditions, demonstrating improved cell performance.

    Original languageEnglish
    Pages (from-to)164-169
    Number of pages6
    JournalSolar Energy Materials and Solar Cells
    Volume125
    DOIs
    Publication statusPublished - 2014

    Fingerprint Dive into the research topics of 'Examining the role of ultra-thin atomic layer deposited metal oxide barrier layers on CdTe/ITO interface stability during the fabrication of solution processed nanocrystalline solar cells'. Together they form a unique fingerprint.

    Cite this