Available Facilities

• UL Indoor Facility

  Indoor Testing

  

  • WLED setup (in-house): long-term stability testing of single-junction perovskite cells; simultaneous testing of up to 24 substrates (144 cells) under white LED illumination
  • BCLED setup (bichromatic LED, in-house): dedicated to tandem device testing
    • Two independently controlled spectral components allow rapid, precise setting of illumination level per sub-cell to match target photogenerated current
    • Designed to minimize light-source degradation for long-term stability studies
  • Paired with in-house μMPP tracker, PL, and EL imaging setups
  • Enables extended maximum-power-point tracking and stability measurements

• UL Outdoor Facility (Ljubljana)

  Outdoor Testing

  

  • Köppen-Geiger climate: DM (hot, humid summers; mild, rainy winters) — valuable for studying temperature-induced degradation, humidity effects, and realistic aging
  • Supports devices from small-area cells to full-size PV modules up to 500 W
  • Operation modes: MPPT, VOC, Jsc, and others; periodic high-resolution JV measurements with customizable time resolution
  • Environmental monitoring: GHI, DHI, plane-of-array irradiance, solar spectrum, ambient temperature, humidity, wind
  • Complemented by indoor equipment for JV, PL, and EL imaging under controlled conditions