Progress in Photovoltaics: Research and Applications

Cover image for Progress in Photovoltaics: Research and Applications

June 2009

Volume 17, Issue 4

Pages 217–277

  1. Research Articles

    1. Top of page
    2. Research Articles
    3. Research: Short Communications
    4. Literature Surveys
    1. Spatially resolved characterization of silicon as-cut wafers with photoluminescence imaging (pages 217–225)

      Johannes A. Giesecke, Manuel The, Martin Kasemann and Wilhelm Warta

      Version of Record online: 25 NOV 2008 | DOI: 10.1002/pip.868

      Thumbnail image of graphical abstract

      Photoluminescence images of as-cut silicon wafers are dominated by a reflection pattern of excitation radiation. This work presents a method to eliminate artifacts due to this direct reflection from these images. In a new approach, the otherwise unfavourable effect of a quickly saturating luminescence intensity in carrier bulk lifetime in as-cut material is used to give a reliable estimate of the lowest carrier bulk lifetimes of an as-cut wafer.

    2. The results of performance measurements of field-aged crystalline silicon photovoltaic modules (pages 227–240)

      Artur Skoczek, Tony Sample and Ewan D. Dunlop

      Version of Record online: 24 DEC 2008 | DOI: 10.1002/pip.874

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      This paper presents the results of electrical performance measurements of 204 crystalline silicon-wafer based photovoltaic modules (53 types, 20 different producers) following 20 years outdoor exposure. Many manufacturers currently give a double power warranty, typically 90% of the initial maximum power after 10 years and 80% of the maximum power after 25 years. Applying the same criteria only 17.6% of modules failed. Even if we consider the initial warranty period i.e. 10% of maximum power after 10 years, more than 65.7% of aged modules exceed this criteria.

    3. Sunrise to sunset optimization of thin film antireflective coatings for encapsulated, planar silicon solar cells (pages 241–252)

      S. A. Boden and D. M. Bagnall

      Version of Record online: 13 MAR 2009 | DOI: 10.1002/pip.884

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      Solar module efficiencies are most often measured under AM1.5, normal incidence conditions, and yet a fixed module experiences a very different set of circumstances over a day. We present an optimization of single and double-layer thin film antireflective coatings using an approach that fully accounts for the sunrise to sunset variations in incident solar radiation. We show that AM1.5 provides a very good first approximation; however, we expect our methodology to be of increasing importance with increasingly asymmetric locations or module designs.

    4. Numerical simulations of buried emitter back-junction solar cells (pages 253–263)

      Nils-P. Harder, Verena Mertens and Rolf Brendel

      Version of Record online: 28 APR 2009 | DOI: 10.1002/pip.887

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      Our buried emitter back-junction solar cell features large area fractions of overlap between n+-type and p+-type regions at the rear side of the device. We analyse the performance of the buried emitter solar cell and its generalizations by one-dimensional device simulations and analytical model calculations. A key finding is that the generalised versions of the buried emitter solar cell structure allows achieving very high efficiencies by passivating virtually the entire surface of p?type emitters by an oxidized n?type surface layer.

  2. Research: Short Communications

    1. Top of page
    2. Research Articles
    3. Research: Short Communications
    4. Literature Surveys
    1. You have free access to this content
      Development of Nano-TiO2 dye sensitised solar cells on high mobility transparent conducting oxide thin films (pages 265–272)

      J. W. Bowers, H. M. Upadhyaya, S. Calnan, R. Hashimoto, T. Nakada and A. N. Tiwari

      Version of Record online: 11 DEC 2008 | DOI: 10.1002/pip.872

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      “Dye sensitised solar cells (DSCs) fabricated on the high mobility transparent conducting oxide, titanium doped indium oxide (ITiO), for use in tandem solar cells have been presented. An increase in NIR transmission through the device, compared to standard cells (using fluorine doped tin oxide (FTO)), is shown. Such an increase would benefit a bottom CIGS solar cell in a tandem structure, due to the higher transmission of light, and result in a higher overall device performance.”

  3. Literature Surveys

    1. Top of page
    2. Research Articles
    3. Research: Short Communications
    4. Literature Surveys
    1. Photovoltaics literature survey (No. 70) (pages 273–277)

      Avi Shalav

      Version of Record online: 28 APR 2009 | DOI: 10.1002/pip.904

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      A single-source reference to the latest solar PV literature, each issue of Progress in Photovoltaics captures the most recently published relevant articles from a wide range of engineering, physics and materials science journals, presented in the following broad categories: 1. Fundamentals, new approaches, and reviews 2. General characterisation techniques and modelling 3. Crystalline silicon-bulk cells and technology 4. Thin film silicon, amorphous and micro/nano-crystalline silicon, heterojunction cells 5. Organic and Hybrid cells 6. Photoelectrochemical cells 7. CIS, CIGS, CdTe and II-VI cells 8. III-V, quantum well, space, concentrator and thermophotovoltaic cells 9. Terrestrial modules, BOS components, building integrated, systems and applications 10. Policy, economics, education, health, environment and the solar resource.

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