Stability of silicon based homojunction and heterojunction solar cells under space conditions

Heinz-Christoph Neitzert, Manuela Ferrara, Wolfgang Fahrner, Maximilian Scherff, Eugenia Bobeico, Francesco Roca, Luca Serenelli, Mario Tucci

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3 Citations (Scopus)

Abstract

Two different types of n-a-Si:H/p-c-Si heterostructure solar cells with intrinsic buffer layer, one type with and one type without back surface field (BSF), and one purely crystalline silicon solar cell have been irradiated with protons at 1.7 MeV. For both types of heterojunctions and for the c-Si homojunction cells a similar dose been found for which degradation starts and also a similar decrease of the effective minority carrier diffusion length with increasing irradiation dose. For one type of heterojunction cells we observed a small increase of the collection efficiency in the blue part of the spectrum after irradiation what can be explained only by modifications of the interface between the crystalline silicon and the amorphous silicon or of the thin intrinsic a-Si:H layer. As a new tool for the evaluation of the solar cell degradation due to proton irradiation, electroluminescence measurements under forward bias have been used. The emission spectra confirms that for doses up to 5 × 1012protons/cm2, silicon band-to-band recombination is the most important contribution to the light emission and the emission efficiency decreases monotonically with increasing proton dose. © 2006 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)263 - 268
Number of pages6
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume134
Issue number2-3 SPEC. ISS.
DOIs
Publication statusPublished - 15 Oct 2006

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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