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    Conversion Efficiency Improvement in GaAs Solar Cells

    Access Status
    Fulltext not available
    Authors
    Das, Narottam
    Islam, Syed
    Date
    2014
    Type
    Book Chapter
    
    Metadata
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    Citation
    Das, N. and Islam, S. 2014. Conversion Efficiency Improvement in GaAs Solar Cells. In Large Scale Renewable Power Generation: Advances in Technologies for Generation, Transmission and Storage, ed. J. Hossain, A. Mahmud, 53-75. Singapore: Springer.
    Source Title
    Green Energy and Technology- Large Scale Renewable Power Generation
    DOI
    10.1007/978-981-4585-30-9_3
    ISBN
    9789814585293
    School
    Department of Electrical and Computer Engineering
    URI
    http://hdl.handle.net/20.500.11937/29708
    Collection
    • Curtin Research Publications
    Abstract

    The finite-difference time domain (FDTD) tool is used to simulate the reflection losses of subwavelength grating (SWG) structure in GaAs solar cells. The SWG structures act as an excellent alternative antireflective (AR) coating due to its capacity to reduce the reflection losses in GaAs solar cells. The SWG structures allow the gradual change in refractive index that confirms an excellent AR coating and light trapping properties, when compared with the planar thin film structures. The nanorod (nano-grating) structure acts as a single layer AR coating, whereas the triangular (conical or perfect cone) and parabolic (i.e., trapezoidal or truncated cone) shaped nano-grating structures act as a multilayer AR coating. The simulation results show that the reflection loss of triangular (conical or perfect cone) shaped nano-grating structure having a 300 nm grating height and an 830 nm period is ~2 %, which is about 28 % less than that of flat type substrates. The simulated results show that the light reflection of a rectangular shaped grating structure is ~30 %, however, the light reflection becomes ~2 % for a triangular (conical or perfect cone) shaped nano-grating structure, because the refractive index changes gradually in several steps and reduces the reflection losses. It is also noticed that the intermediate structures (trapezoidal and parabolic shaped), the light reflection loss is lower than the rectangular shaped nano-grating structure but higher than the triangular shaped nano-grating structure. The simulated results confirm that the reduction of light reflection losses in GaAs solar cell will increase the conversion efficiency. Therefore, this analysis confirmed that the triangular (i.e., perfect cone or conical) shaped nano-grating structures are an excellent alternative AR coating for the improvement of conversion efficiency in GaAs solar cells.

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    • Design and analysis of nano-structured gratings for conversion efficiency improvement in gaas solar cells
      Das, Narottam; Islam, Syed (2016)
      © 2016 by the authors; licensee MDPI.This paper presents the design and analysis of nano-structured gratings to improve the conversion efficiency in GaAs solar cells by reducing the light reflection losses. A finite-difference ...
    • Optimization of nano-grating structure to reduce the reflection losses in gaas solar cells
      Das, Narottam; Islam, Syed (2012)
      In this paper, finite-difference time domain (FDTD) method is used to simulate the reflection losses of subwavelength grating (SWG) structure in GaAs solar cells. The SWG structures make an excellent alternative antireflective ...
    • Analysis of Incident Light Angles on Nanograting Structure for Minimizing Reflection Losses in GaAs Solar Cells
      Das, Narottam; Charoenpitaks, Korawat; Islam, Syed (2013)
      Subwavelength grating (SWG) structures make an excellent alternative antireflective (AR) coating due to its capacity to reduce the reflection losses in GaAs solar cells. The SWG structures allow the gradual change in ...
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