Overview

Litos is an advanced solar cell and LED stability lifetime measurement system. It has 16 (or 32) parallel stressing channels distributed over 4 airtight weathering chambers. Each chamber has an individual temperature and illumination control. The wide range of stress conditions and the 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 solar cells and LEDs.

solar cell and LED lifetime measurement system. Stess-test analyis of oleds and solar cells

Advantages

Stress tests on perovksite solar cells and organic solar cells, according to ISOS protocols.
32 (or 16) individual channels to address multiple solar cells or LEDs in parallel.
4 weathering chambers with individual humidity sensors and independent illumination.
Design customized to the specific sample layout of the customer.
The Litos-Paios Integration provides a unique tool to understand the degradation mechanisms in solar cells and LEDs.
Patented OLED accelerated ageing and lifetime estimation procedure. Accelerated Testing Module for solar cells.
Compatible with atmosphere-controlling equipments.
User-friendly software for automatic measurement control and parameter extraction.

Specifications

    Independent stressing and characterization of 32 device in 4 airtight chambers
  
    Functionality
    MPP, Voc, Jsc, JV(L), in-situ spectral measurements (PL and EL)
  
    Operations
    All channels are independent. Independent temperature/atmosphere controllers. 
  
    Min/Max Voltages
    0-10 V and -5 – 5 V (user-selectable).
  
    Maximum current
    20 mA /channel
  
    Temperature Range 
    0 - 125°C
  
    Sample Size
    Up to 2 inches
  
    Light Intensity
    Up to 10 suns
  
    Computer Connection
    USB
  
    Illumination
    Integrated in each chamber. White + UV LEDs
  
    Atmosphere Control
    Airtight Chambers. Fluxim Atmosphere Control Module.

Request a DEMO of Litos

LITOS DEMO and QUESTIONS

Solar Cells

4 weathering chambers with humidity sensors.
16 (4x4) individual channels. Samples up to 2 inches.
Maximum power point (MPP) tracking, constant voltage/current.
Temperature control of the individual sample 0 – 125 °C.
White and UV LED illumination (configurable). Independent illumination system for each chamber.
Accelerating testing module: >10 sun equivalent illumination.
In-situ UV-vis absorption possible for bleaching detection.

LEDs

Constant current, constant luminance, constant voltage.
16 (4x4) individual channels. Samples up to 2 inches.
Compatible with Bottom and Top Emitting LEDs
Individual photodiodes to trace emission of each individual LEDs under test.
Patented LED accelerated ageing and lifetime estimation procedure.
1 dedicated spectrometer each chamber.

Fluxim Characterization Suite software compatible with Paios for in-depth degradation analysis.

A combined version for both Solar Cells and LEDs is also available.

Sample Holder

Litos has 4 independent chambers to test simultaneously 4 samples with multiple pixels. The sample holders are custom-made according to the specific layout of our customers. Multiple boards with different layout can be delivered. The board can be quickly replaced in the testing chamber by the user. Depending on the selected configuration, up to 8 solar cells or LEDs can be stressed individually in each chamber (32 solar cells in total).

explanation of the litos chambers. inside view

LEDs and Peltier

Sample holder - 8 perovskite Solar Cells

Electrode Board on Top of the Sample

Transparent Lid of the Single Chamber

Litos/Paios Integration

combined characterization hardware to perform stability tests and understand the degradation mechanisms in perovskite solar cells

Paios and Litos can be connected and managed by the same software (Characterization Suite). Full characterization of the device stability can be automatically performed in situ:

Understanding the degradation mechanisms of solar cells and LEDs with an automated routine of stressing and analysis.
Current-Voltage (I-V) characteristics.
Transient measurements (CELIV, TPV, TPC, TEL …)
Impedance spectroscopy / CV / IMPS / IMVS.
All measurements can be performed as a function of the temperature ( -10°C to 125°C).

analysis of the degradation mechanisms in an organic solar cell

Atmospheric Control Module

A complete solution to engineer the atmosphere inside the chambers and perform degradation analyses under different enviromental conditions. PPM precision for both oxygen and water:

atmosphere controller for degradation analysis of perovskite solar cells

Nitrogen and dry air generator
Connection and independent control on each individual chamber (4 chambers in total)
1 water bubbler.
Precision O2/N2 sensor and 3 mass-flow controllers.
1 Control unit for mass-flow controllers integrated. It can connect any gas to the mass-flow controller
A simple version to be integrated with existing infrastructure is also available.