Progress in Photovoltaics: Research and Applications

Cover image for Progress in Photovoltaics: Research and Applications

June 2010

Volume 18, Issue 4

Pages 233–309

  1. Research Articles

    1. Top of page
    2. Research Articles
    3. Research: Short Communications
    4. Applications
    5. Literature Survey
    1. Identification of candidate material systems for quantum dot solar cells including the effect of strain (pages 233–239)

      Som N. Dahal, Stephen P. Bremner and Christiana B. Honsberg

      Article first published online: 30 MAR 2010 | DOI: 10.1002/pip.937

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      A search of material combinations for intermediate band solar cells realized through quantum dots, with the effects of strain included via the model solid theory, was performed. Search criteria include low valence band offsets and high limiting energy conversion efficiency with metamorphic and pseudomorphic structures. Of the material combinations identified, the AlInAs/InAsP system on a metamorphic buffer (calculated band diagram shown) is suggested as being of greatest interest due to miscibility and growth consideration.

    2. Electrical properties of fine line printed and light-induced plated contacts on silicon solar cells (pages 240–248)

      M. Hörteis, J. Bartsch, S. Binder, A. Filipovic, J. Merkel, V. Radtke and S. W. Glunz

      Article first published online: 30 MAR 2010 | DOI: 10.1002/pip.938

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      Front side contacts on crystalline silicon solar cells are the topic of this research. The electrical properties of fine-line printed and silver-plated contacts are investigated dependent on the amount of deposited (printed and plated) silver. Line conductivity close to the one of bulk silver and a specific contact resistance below 1 mΩcm2 were measured on test samples and industrial silicon solar cells.

    3. Improved fill factor and open circuit voltage by crystalline selenium at the Cu(In,Ga)Se2/buffer layer interface in thin film solar cells (pages 249–256)

      C. Platzer-Björkman, P. Zabierowski, J. Pettersson, T. Törndahl and M. Edoff

      Article first published online: 11 MAR 2010 | DOI: 10.1002/pip.957

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      A surface treatment by evaporated selenium on Cu(In,Ga)Se2 is shown to improve open circuit voltage, Voc, and in some cases fill factor, FF, in solar cells with CdS, (Zn,Mg)O or Zn(O,S) buffer layers. The improvements are counteracted by a decrease in short circuit current assigned to absorption in hexagonal Se. Improved efficiency is shown for device structures with (Zn,Mg)O and Zn(O,S) buffer layers by atomic layer deposition.

    4. High-rate deposition of microcrystalline silicon in a large-area PECVD reactor and integration in tandem solar cells (pages 257–264)

      Gaetano Parascandolo, Grégory Bugnon, Andrea Feltrin and Christophe Ballif

      Article first published online: 11 MAR 2010 | DOI: 10.1002/pip.961

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      The high-rate deposition of microcrystalline silicon (μc-Si:H) is one of the most important technological challenges in view of low cost manufacturing of thin-film silicon solar cells. In the little explored process conditions of high-pressure and high-silane concentration and depletion we deposit device-grade intrinsic μc-Si:H layers at 10 Å/s, using feed-in power densities as low as 0.28 W/cm2. We integrate such layers in superstrate micromorph solar cells and report an initial (stabilized) efficiency of 10.8% (9.6%).

    5. High-quality multi-crystalline silicon growth for solar cells by grain-controlled directional solidification (pages 265–271)

      K. M. Yeh, C.K. Hseih, W. C. Hsu and C.W. Lan

      Article first published online: 11 MAR 2010 | DOI: 10.1002/pip.964

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      The quality of multicrystallibe-silicon (mc-Si) is crucial to the solar cell efficiency. By using active cooling spot and crucible insulation during directional solidification, high-quality mc-Si ingots have been grown. The grown crystals showed a high percentage of twin boundaries, and the grains with twins had an extremely low dislocation density and higher minority carrier lifetime. This technique can be easily scaled up to a commercial scale.

      Comparison of μ-PCD lifetime (left) and the texture (right) mappings of the wafers from the bottom and the top of the crystal using grown by this technique. The dislocation density of the numbered areas was measured showing the twin area had a much lower dislocation density.

    6. Multijunction solar cell model for translating I–V characteristics as a function of irradiance, spectrum, and cell temperature (pages 272–284)

      César Domínguez, Ignacio Antón and Gabriel Sala

      Article first published online: 11 MAR 2010 | DOI: 10.1002/pip.965

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      A lumped diode model for multijunction solar cells is described. An experimental method based on it for predicting the IV-curve under any irradiance-spectrum-temperature conditions starting from a single input measurement is proposed and applied to a set of commercial triple-junction solar cells. Component ‘isotype’ cells are used as reference cells, sparing the measurement of light spectrum and cell spectral response. A mean RMS prediction error of 0.85% is reported, over a range of 100X-25°C to 700X-75°C.

  2. Research: Short Communications

    1. Top of page
    2. Research Articles
    3. Research: Short Communications
    4. Applications
    5. Literature Survey
    1. You have free access to this content
      The use of Ti meshes with self-organized TiO2 nanotubes as photoanodes of all-Ti dye-sensitized solar cells (pages 285–290)

      Yuanhao Wang, Hongxing Yang, Yong Liu, Hai Wang, Hui Shen, Jin Yan and Hongmei Xu

      Article first published online: 11 MAR 2010 | DOI: 10.1002/pip.945

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      The all-Ti DSSC using Ti mesh with a titanium dioxide nanotubular array layer as the photoanode and Ti sheet electrodeposited with platinum thin film as the counter electrode. Compared with the backside illuminated DSSC, this cell could allow sunlight irradiation through the photoanode side to avoid the light loss.

  3. Applications

    1. Top of page
    2. Research Articles
    3. Research: Short Communications
    4. Applications
    5. Literature Survey
    1. You have free access to this content
      Sustainability of PV water pumping programmes: 12-years of successful experience (pages 291–298)

      L. Narvarte and E. Lorenzo

      Article first published online: 11 MAR 2010 | DOI: 10.1002/pip.959

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      This paper presents the key points to assure the sustainability of a PV water pumping program that has supplied five million m3 of water in the last 12 years to approximately 40,000 people: proper consideration of user's priorities, rigorous technical quality assurance, and maintenance structure set up.

    2. You have free access to this content
      An ice machine adapted into an autonomous photovoltaic system without batteries using a variable-speed drive (pages 299–305)

      C. Driemeier and R. Zilles

      Article first published online: 11 MAR 2010 | DOI: 10.1002/pip.960

      Thumbnail image of graphical abstract

      A commercially available ice machine was adapted for autonomous photovoltaic operation without batteries. Using a variable-speed drive, motor speed and refrigerant evaporation pressure are set aiming at continuously matching system power demand to photovoltaic power availability. The resulting 1040 Wp system produces 27 kg of ice in a clear-sky day and has ice production costs around US$0.30/kg.

  4. Literature Survey

    1. Top of page
    2. Research Articles
    3. Research: Short Communications
    4. Applications
    5. Literature Survey
    1. Photovoltaics literature survey (no. 78) (pages 306–309)

      Santosh Shrestha

      Article first published online: 17 MAY 2010 | DOI: 10.1002/pip.996

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