Product Introduction
Product Features
Technical Details
Product Introduction

The award-winning LumiSolarCell System utilizes the photoluminescence, electroluminescence, and infrared phenomena to image micro cracks, shunts, regions of low lifetime, inhomogeneities, hot spots or other cell failures of photovoltaic cells or wafers. EL, PL and IR as contactless and therefore non-destructive methods are an indispensable tool for advanced solar research. In addition to that, the series resistance (Rs) can be measured by an algorithm which compares EL images taken under low and high current conditions. The knowledge gained will lead to increased product quality and yield.

Due to the outstanding sensitivity of the whole set-up, multiple PV technologies such as Si-based cells and wafers as well as thin film mini modules can be measured. LumiSolarCell is delivered as a turnkey system and consists of a highly-sensitive scientific CCD-camera and a HighPower LED light source, developed and produced by greateyes. Different versions of the system are available (off-line, automated batch system, OEM in-line, pure PL or EL, combined EL/PL, or EL/PL/IR/Rs). Furthermore the LumiSolarCell system outperforms commercial available PL systems with very short exposure times by using a high-sensitive CCD-camera and the flexibility to measure a variety of different wafer materials, such as mono-Si, a-Si, CIS, HIT and many more.

Product Features

  • Inspection of wafer and solar cells
  • Combined EL/PL/IR/Rs system in a compact table top device
  • Unique, award-winning HighPower LED light source

Technical Details

Functionalities EL, Reverse bias EL, PL, biased PL, Series resistance, (Lock-in) Thermography, Lifetime
PL light source HighPower LED array

Adjustable intensity, max. 1500 W/m2 (>1 Sun)

Homogeneity > 90%

EL excitation source Programmable power supply, 0-100 , 0- 7.5 A

4-quadrant power supply (V+, V-, I+, I-), 0 to +/- 20 V, 0 to +/- 10 A

Image size Vacuum contact adapters for IBC cells available as an option

1024 x 1024 pixel, 16 bit or 2048 x 2048 pixel, 16 bit

Substrate size max. 200mm x 200mm
Image resolution 150μm/pixel or 80μm/pixel
Typ. exposure times 0.1sec-10sec depending on the substrate and type of measurement
Power supply input 100-240V, 50/60Hz
Dimensions of housing 715mm x 600mm x 1120mm
Weight ~60kg


  • Inspection of wafers, processed solar cells and thin film substrates
  • Research and development
  • Characterization and qualification
  • Failure analysis
  • Identification/sorting of wafers & cells

LumiSolarCell Software

The LumiSolarCell software controls the camera and visualizes the data sets. The program can generate intensity profiles from the 16bit high dynamic range image data. Basic picture manipulation procedures are included in the software. Dimension measurements of artefacts are possible following calibration as well as remote control of power supply and high power LED light source.