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IVS-KA6000

KA6000 – The Most Comprehensive IV Measuring and Analysis Software for Perovskite Solar Cells.

  With over 10 years of experience, IVS-KA6000 PV Test IV software has been developed by Enli Technology.  IVS-KA5000, the previous generation, has more than 500 users. IVS-KA6000 is evolved from IVS-KA5000 based on users’ feedback and experience. IVS-KA6000 can control a variety of SMUs and perform data collection of current and voltage based on setting parameters by users. The formulas and algorithms of IVS-KA6000 are based on the foundation developed and released by NREL. 

IV measuring and analysis software

  Users can clearly understand how to improve the efficiency in solar cell research by IVS-KA6000. Besides, IVS-KA6000 software has assisted many customers to continuously break through the record of the highest cell-conversion-efficiency and published on NREL’s best cell efficiency chart. For example, 23.3% perovskite solar cells of the Chinese Academy of Sciences (2019), 24.8% perovskite solar cells of UNIST (2020), 15.7% organic solar cell of Y6 material from South China University of Technology and Central South University (2019), 18% organic solar cells of the Institute of Chemistry of the Chinese Academy of Sciences (2020), etc.

Contents

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Features and Specifications

    1. Measurements: Isc, Voc, Jsc, Jmax, Pmax, Vmax, Imax, η, FF, Rs, Rsh
    2. Automatic IV measurement under steady-state conditions. (The best solution for measuring perovskite solar cells)
    3. IV curve overlay display.
    4. Forward scan/ Reverse scan/ Automatic forward and reverse scanning measurement
    5. Automatic polarity reversal test.
    6. 2 segment IV measurement.
    7. Quick note.
    8. Semi-log display.
    9. Jsc display.
    10. Voltage and current monitoring measurement.
    11. IV configuration recipe.
    12. Light soaking & MPPT measurement.
    13. Multi-channel automatic measurement. (Integrated function)
    14. Light-intensity-dependent measurement. (Integrated function)
    15. Real-time correction function according to IEC.
    16. NREL Asymptotic measurement.
    17. Backup measurement data automatically.
    18. File export format: CSV/TXT File.

Supported Instrument

    • Keithley 2400 series
    • Keithley 2450
    • Keithley 2600 series (with latest firmware)
    • Keysight B2900 series

System Integration

SS-X Solar Simulator

      • Remote control light intensity.
      • Light-intensity-dependent measurement.

Auto Switch Box

      • Multi-channel automatic measurement

Thermometer

      • Record the temperature during measurement.
      • Perform temperature coefficient correction.

Data Analysis with KA-viewer Software

      • Ideal factor “n”
      • MMF correction
      • SCLC fitting
      • Diode model fitting
      • Temperature coefficient correction
      • Tandem cell IV calculator

Difference between IVS-KA6000 and Other Brands

Most of the IV testing software on the market is positioned as an accessory to the solar simulator and only provides basic test and easy analysis. Most of them won’t develop new functions according to user’s experience and requirement. 

IV measurement and analysis

Simple IV test software from other brands only provides basic IV measurement and analysis. However, feedbacks from customer usage and requirements cannot be satisfied. For the development of new-type solar cells, typical simple IV test software cannot support relevant measurement and analytical technology and is hard to help user make a breakthrough.

IV software

Rough IV software imitating IVS-KA.

For example, due to the hysteresis effect of perovskite solar cell, changes in voltage and electric field affect the carrier mobility and charge accumulation. This hysteresis effect makes different IV curves for the same solar cell when doing forward-voltage-sweep and reversing-voltage-sweep. 

IV curve for forward and reverse scan

Different results of IV curve for forward and reverse scan are observed for the same perovskite solar cell. A significant difference between two curves represents different results of the conversion efficiency.

The IV software developed by Enli Technology is the pioneer in the industry in perovskite and organic solar cells and achieves many important functions, including: 

  1. Forward and Reverse IV Scan Function 
  2. Sweep Voltage Increase Rate Control 
  3. I-t, V-t, MPPT Tracking Function 
  4. Single Sample Multi Sub-Cell Automatic Test 
  5. Light soaking and MPPT (Max power point tracking) testing tool
  6. Correction function according to IEC international standard
  7. Automatic light-intensity-dependent measurement
  8. NREL asymptotic measurement

1. Forward and Reverse IV Scan Function:

  Traditionally, individual measurement condition settings twice are necessary. Reverse IV-scan can be started until completing forward IV-scan condition settings, forward IV-scan test, and then reverse IV-scan condition settings in order. Besides, two individual IV curves need to be plotted together by manual after finishing all measurements. Traditional method is extremely time-consuming. 

  Enli Technology is the first supplier of IV software to realize automatic forward and reverse IV scanning functions. In 2015, pervious generation, IVS-KA5000 has implemented these functions. Besides, more than 100 laboratories developing high-efficiency solar cells adopt IVS-KA5000 to help users to accelerate the breakthrough of conversion efficiency (PCE).

2. Sweep-Voltage-Increase-Rate-Control:

The voltage-increase-rate will affect the IV curve results of perovskite solar cells. Since 2016, the voltage-increase-rate-control has been a standard function of the IVS-KA software. IVS-KA software attached this control function help users to deeply analyze the material system and hysteresis effect of perovskite solar cells. 

IV curve results of the perovskite solar cell

The IV curve results of the perovskite solar cell under different sweep-voltage-increase-rate conditions. (Source: The Journal of Physical Chemistry Letters)

3. I-t, V-t, MPPT Tracking Function:

To analyze the stability of new material system, in 2017, IVS-KA software added the “I-t Monitor” function to monitor the time-dependent current of single solar cell. Moreover, monitor functions of time-dependent voltage(V-t) and maximum-power-point-tracking (MPPT) are integrated to IVS-KA6000. It will be a convenient tool to users to study the stability of new types of solar cells such as perovskite or organic.

time-tracking functions I-t, V-t, and MPPT

Many time-tracking functions are implemented in IVS-KA6000, including I-t, V-t, and MPPT. 
IVS-KA6000 will be a powerful and convenient tool to users and researchers. (Source: Nano Energy)

IT (Current versus time) monitoring tool

IT (Current versus time) monitoring tool.

4. Single Sample Multi Sub-cell Automatic Test:

With the development of efficiency research, everyone values the authenticity and reproducibility of the improvements to solar cells with different manufacturing process. Providing statistical data on experimental results is the effective way to confirm the reality, as shown below. To get statistical data, a large number of solar cells will be tested, and generate repeated measurements. If the automatic testing for a single sample with multi-sub-cells is realized, the research and efficiency of the laboratory will be greatly improved. And thereby speeds up the publication rate of papers.

PCE efficiency distribution of 23.3% perovskite solar cells

The PCE efficiency distribution of 23.3% perovskite solar cells with different manufacturing processes published by Nature Photonics. To get this statistical distribution, two separated groups (experiment and control) were performed IV measurements and PCE analysis. This diagram demonstrates the overall reproducibility of experimental results and the authenticity of the data.

IVS-KA6000 can not only integrate the former 8-channel four-wire multiplexer manufactured by Enli Technology but also support 32-channel automatic multiplexer. It can automatically switch test for 32 independent sub-cells and greatly shorten user’s testing time without switching and reconnecting cable. Besides, it reduces the possible artificial-measurement-errors. 

Integrated Auto-switch box and test fixtures for automatic multi-channel measurement.

Integrated Auto-switch box and test fixtures for automatic multi-channel measurement.

Multi Sub-cell Automatic Test

IVS-KA6000 Single Sample Multi Sub-cell Automatic Test: Channel-setting screen

Single Sample Multi Sub-cell Automatic Test

IVS-KA6000 Single Sample Multi Sub-cell Automatic Test

5. Light soaking and MPPT (Max power point tracking) testing tool

IVS-KA6000 has several powerful testing tools. Such as light soaking (MPPT) testing tool, current and voltage monitoring. There are convenient tools for users to study the stability of many new types of solar cells such as perovskite or organic solar cells.

Light soaking or MPPT test setting

IVS-KA6000 Single Sample Multi Sub-cell Automatic Test

Result data of the light soaking (MPPT) measurement.

Result data of the light soaking (MPPT) measurement.

6. Correction function according to IEC international standard

IEC standards define standard test conditions (STC), which are irradiation spectrum is AM1.5G, the light intensity is 1000W/m^2, and the temperature of the solar cell is 25°C. IVS-KA6000 has 3 correction functions. They are temperature coefficient correction, irradiance correction, and MMF correction. These correction functions can make the test data more authentic and reliable, which will be beneficial to the development of research projects or the publication of journals.

KA6000 Temperature Correction
Correct to 1 SUN

IVS-KA6000 can perform MMF or temperature coefficient correction immediately by user-friendly interface.

7. Automatic light-intensity-dependent measurement

solar simulator

Integration with the SS-X Solar simulator, which can control the different testing procedures such as light-intensity-dependent testing or light ON/OFF delay control.

IVS-KA6000 supports the popular SMU (Please refer to the supported SMU below), SS-X Solar Simulator or Auto-Switch Box. The integration of these instruments can be used to complicated measurement. Example:

The IV curve of the solar cell under different irradiance intensities through the light-intensity-dependent measurement of IVS-KA6000 combined with the SS-X Solar Simulator.

8. NREL asymptotic measurement

NREL asymptotic measurement function.

About the details of NREL asymptotic measurement procedures, please be free to contact us for more information or demonstrations.

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