Litos is an advanced solar cell and LED lifetime measurement system. It has 32 parallel stressing channels distributed over 4 airtight weathering chambers. Each sample has an individual temperature and illumination control. Wide range of stressing techniques inside a highly-controlled experimental environment, full automation and a possibility of interfacing Litos with Paios for in-depth degradation analysis, make it a primary choice for researchers that want to understand the degradation behavior of organic, perovskite and quantum-dots based LEDs and solar cells.

We offer a flexible design compatible with samples of different layout. Both top and bottom-emitting LEDs are compatible.

PV, LED and hybrid configurations available.

Litos Tutorial Video


  • Design customized to the specific sample layout of the customer (multiple layouts possible also with the same system)

  • Modular: connect several systems together for device serial analysis

  • Compatible with atmosphere-controlling equipment

  • User-friendly software for automatic measurement control and parameter extraction


Up to 32 devices in 4 independent airtight chambers equipped with humidity sensors
Maximum Voltage 10V
Maximum current 20 mA /channel
Full temperature control 0 - 150°C
Sample size Up to 2 inch


  • Constant current, constant light, constant voltage

  • Bottom and top emitter- compatible

  • In-situ spectrometer available (extra module)

  • Luminescence measurements

  • Patented OLED accelerated aging and lifetime estimation integrated

For Solar Cells

  • Maximum power point tracking, constant voltage/current

  • Two-colour LED illumination with UV (configurable)

  • >10 sun equivalent illumination for accelerated testing

  • In-situ UV-vis absorption possible for bleaching detection (extra spectrometer module)

  • In-situ PL and EL measurements possible


In combination with Paios, a full device characterization can be performed automatically: 

  • Current-Voltage (I-V) characteristics.

  • Transient measurements (CELIV, DLTS, TPV, TPC, ...).

  • Impedance spectroscopy / CV.

  • IMPS / IMVS (for solar cells).

  • All measurements can be performed as a function of temperature and ambient conditions.

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