LUMiKON (a word merger of ‘luminescence’ and ‘ikon’) is the most advanced absolute PL imaging system for perovskite-silicon tandem solar cells currently available. Unlike conventional PL imaging systems, the larger Lumikon models are able to determine the total photoluminescence from both the perovskite and silicon cells, rapidly providing accurate photovoltaic parameters including the spatially-resolved implied open-circuit voltage. All models offer exceptional spectral filtering capabilities that surpass industry standards, blocking even the most challenging specular reflections from textured samples. Coupled with deliberate design choices aimed at eradicating any background luminescence from the enclosure, the resultant images exhibit remarkable reliability and consistency.

The system can be ordered in four primary configurations, Max, MINI, SFF and INLINE. All can be ordered to suit specific sample sizes. Sources and stages for electroluminescence (EL) imaging are also available.
Please contact us directly to enquire about in-line production-capable variants.

Lumikon MAX captures full hyperspectral images of solar cells, allowing researchers to determine the absolute photoluminescence (PL) and/or electroluminescence EL emission spectrum and rapidly extract quantities such as material composition implied open circuit voltages (iVoc) and bandgap energy at every pixel.
It employs a novel interferometric hyperspectral camera that offers both higher throughput and finer spectral resolution than conventional line-scanned systems. Systems can be ordered for VIS (400-1000nm), SWIR (900-1700nm), or full (400-1700nm) spectral ranges.
The system is also able to provide equivalent images to the SBF version.


Lumikon MINI is the smallest member of the Lumikon family. It is intended to be used inside a glove box to give the researcher immediate feedback via photoluminescence (PL) images on grown perovskites film qualities, but is equally at home on a bench top. Specific emphasis is placed on (a) exceptional spectral filtering, (b) the ability to load/unload samples while wearing gloves and (c) fully automated image acquisition and saving of all data and images as soon the sample is loaded.
An upgraded version is available that calculates implied open circuit (iVoc) and absolute photoluminescence (PL) images via the SBF technique [1].

[1] Arman Mahboubi Soufiani et al., ‘Implied Open-circuit Voltage Imaging via a Single Bandpass Filter Method—Its First Application in Perovskite Solar Cells’, 2022, Adv. Funct. Mater., DOI: 10.1002/adfm.202210592

Lumikon SBF is a full cell size PL imager that implements the Single Bandpass Filter method of Soufiani et al. [1]. With this it enables researchers to rapidly obtain contactless images of absolute photoluminescence (PL) and implied open circuit voltages (iVoc). A wide selection of filters are available to match the material composition under investigation.

[1] Arman Mahboubi Soufiani et al., ‘Implied Open-circuit Voltage Imaging via a Single Bandpass Filter Method—Its First Application in Perovskite Solar Cells’, 2022, Adv. Funct. Mater., DOI: 10.1002/adfm.202210592

Lumikon INLINE is the world’s first absolute PL imager designed for single- and multi-junctions in manufacturing lines. It sets a new standard by generating absolute photoluminescence (PL) and implied open circuit voltages (iVoc) images at production speeds. Each imager captures one junction at a time, necessitating two Lumikon INLINE units for tandem junctions.

Currently in early development, we invite you to contact us to explore how Lumikon INLINE can be customized to perfectly fit your manufacturing needs.

images abs. PL (abs.) PL abs. PL abs. PL
(abs. EL)   – (abs. EL) (abs. EL)
iVoc (iVoc) iVoc iVoc
Eg   –   –   –
# junctions 1-3 1 1-3 1-3
size (mm) 300×300 30×30 300×300 300×300
inline    –    –    – inline
  • Automatic correction for background signal, vignetting, distortion, and non-linearities
  • Fully-automated control of filtering and illumination
  • Better than 10% non-uniformity of irradiance at the sample plane
  • Irradiance control from 0.1 to 1.2 Suns equivalent current, assuming unity EQE for the device under test
  • Light-tight and interlocked enclosure, meeting EU safety standards
  • Guided and semi-automated system calibration procedure for iVoc images

The following options are available:

  • Measurement of triple-junction cells
  • Electroluminescence (EL) imaging with a custom contacting stage
  • Extension to measure sample sizes up to 300 x 300 mm2
  • Calibrated QTH black body to re-calibrate the system for the SBF technique
  • Custom light biasing and pre-soaking options
  • Implementation of custom algorithms and UI changes

(not available yet)