• English
  • Deutsch
  • Log In
    Password Login
    Research Outputs
    Fundings & Projects
    Researchers
    Institutes
    Statistics
Repository logo
Fraunhofer-Gesellschaft
  1. Home
  2. Fraunhofer-Gesellschaft
  3. Artikel
  4. Two-terminal III-V//Si triple-junction solar cell with power conversion efficiency of 35.9 % at AM1.5g
 
  • Details
  • Full
Options
2022
Journal Article
Title

Two-terminal III-V//Si triple-junction solar cell with power conversion efficiency of 35.9 % at AM1.5g

Abstract
III-V//Si multijunction solar cells offer a pathway to increase the power conversion efficiency beyond the fundamental Auger limit of silicon single-junctions. In this work, we demonstrate how the efficiency of a two-terminal wafer-bonded III-V//Si triple-junction solar cell is increased from 34.1 % to 35.9 % under an AM1.5g spectrum, by optimising the III-V top structure. This is the highest reported efficiency to date for silicon-based multijunction solar cell technologies. This improvement was accomplished by two main factors. First, the integration of a GaInAsP absorber in the middle cell increased the open-circuit voltage by 51 mV. Second, a better current matching of all subcells enhanced the short-circuit current by 0.7 mA/cm2. Two different growth directions, upright and inverted, were investigated. The highest cell efficiency of 35.9 % (Voc = 3.248 V, jsc = 13.1 mA/cm2, FF = 84.3 %) was achieved with an upright grown structure. Processing of upright structures requires additional bonding steps, which results in a reduced homogeneity of cell performance across the wafer. A detailed comparison with the currently best triple-junction solar cell reveals future improvement opportunities and limits, considering voltage and current, respectively.
Author(s)
Schygulla, Patrick  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Müller, Ralph  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Lackner, David  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Höhn, Oliver  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Hauser, Hubert  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Bläsi, Benedikt  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Predan, Felix  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Benick, Jan  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Hermle, Martin  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Glunz, Stefan W.  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Dimroth, Frank  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Journal
Progress in Photovoltaics  
Open Access
DOI
10.1002/pip.3503
10.24406/h-415706
File(s)
Progress in Photovoltaics - 2021 - Schygulla - Two_u2010terminal III V Si triple_u2010junction solar cell with power conversion.pdf (2.95 MB)
Rights
CC BY 4.0: Creative Commons Attribution
Language
English
Fraunhofer-Institut für Solare Energiesysteme ISE  
Keyword(s)
  • Efficiency

  • III-V/Si tandem solar cells

  • MOVPE

  • Cookie settings
  • Imprint
  • Privacy policy
  • Api
  • Contact
© 2024