• English
  • Deutsch
  • Log In
    Password Login
    Research Outputs
    Fundings & Projects
    Researchers
    Institutes
    Statistics
Repository logo
Fraunhofer-Gesellschaft
  1. Home
  2. Fraunhofer-Gesellschaft
  3. Scopus
  4. Implied Voltage and Current Characterization in Organic Solar Cells using Transient Photoluminescence
 
  • Details
  • Full
Options
2025
Journal Article
Title

Implied Voltage and Current Characterization in Organic Solar Cells using Transient Photoluminescence

Abstract
Measuring photoluminescence (PL) of free charge carriers under operation conditions is a valuable tool for characterizing solar cells. However, in organic solar cells, free charge carrier PL is typically obscured by the emission from non-dissociated excitons. To overcome this, an adaptation of the time-resolved PL measurement method is introduced that allows for the separate observation of the effects of applied voltage on the PL of excitons and free charge carriers. Using state-of-the-art D18:Y6 and PM6:Y6 organic solar cells (power conversion efficiencies: (Formula presented.) and (Formula presented.)), this study demonstrated: I) the determination of the implied voltage from free charge carrier PL under operation conditions providing insights into transport losses under steady-state and transient conditions, II) the construction of a PL-based current-implied voltage curve revealing implied efficiencies of (Formula presented.) and (Formula presented.); III) an estimation of the photogenerated current at the maximum power point by combining PL and electroluminescence measurements, showing a (Formula presented.) reduction compared to the short-circuit current, and IV) a discussion of possible origins of this reduction, including recombination due to limited transport, electrode-induced charges and field-dependent exciton dissociation. The introduced method thus provides a valuable diagnostic tool for identifying both transport and current losses in high-efficiency organic solar cells.
Author(s)
Faißt, Jared  
Fraunhofer-Institut für Solare Energiesysteme ISE  
List, Mathias  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Baretzky, Clemens
Fraunhofer-Institut für Solare Energiesysteme ISE  
Bett, Andreas W.  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Würfel, Uli  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Journal
Advanced energy materials  
Open Access
DOI
10.1002/aenm.202501348
Additional full text version
Landing Page
Language
English
Fraunhofer-Institut für Solare Energiesysteme ISE  
Keyword(s)
  • charge carrier transport

  • field-dependent current generation

  • organic solar cell

  • pseudo current-voltage curve

  • quasi-fermi-level splitting

  • transient photoluminescence

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