PRODUCT CONTACT:

Ben Parker
Sales Manager
+44 (0)1372 378822




Solar Cell Characterisation

Components for IV measurements

Photovoltaics

We work with ReRa Solutions who are experts in the field of solar cell measurement. They have developed several dedicated instruments and software packages for the measurement and calibration of many different types of solar cells.

With regards to off-the-shelf solutions, we can offer all the major components required to make an IV measurement of a solar cell – from probing the cell, to measuring the generated photocurrent, to calculating the relevant IV parameters/curves. That being said, our standard instruments are primarily designed for R&D facilities using small scale lab based devices.

For custom requirements, including measurement of larger scale cells or modules, please contact us

Contact: Ben Parker
Sales Manager
+44 (0)1372 378822
ben@qd-uki.co.uk

SPECIFICATION OVERVIEW

  • FEATURES:
  • Silicon and GaAs reference cells – open or shunted versions
  • Solar cell probes
  • Solar cell IV converter
  • Tracer IV curve software
  • IV measurement electronics (basic IV system)
  • Models

    Solar Reference Cells

    We offer Silicon and GaAs reference cells for the measurement of the irradiance of Solar Simulators

     

    Key features

    Calibrated under STC against traceable secondary reference standards (NREL or JRC-ESTI)

    Open and shunted versions

    Shunted version: Isc only

    Open version: Isc, Voc, Impp, Vmpp, FF and Efficiency

    Protective Quartz window

    Fully integrated with Tracer IV software

    Includes calibration certificate and carry case

    BNC or banana plug (standard) cable termination

     

    Models:

    Silicon reference cell – shunted (RR-1001)

    Silicon reference cell – open (RR-1002)

    GaAs reference cell – open (RR-1003)

    GaAs reference cell – shunted (RR-1004)

     

    Options:

    All Silicon reference cells can be ordered with a Schott KG glass filter (replaces standard Quartz window) for measurement of specific solar cell materials

     

    KG1 window (RR-1010-1)

    KG2 window (RR-1010-2)

    KG3 window (RR-1010-3)

    KG4 window (RR-1010-4)

    KG5 window (RR-1010-5)

    Solar Cell Probe

    Our standard solar cell probes are designed for routine measurement of small scale lab based solar cells. Because of their strong magnetic base, the probes can be used in both substrate and superstrate configurations. The probe can handle a maximum current of 2 Amps. The probes are configured for either 2 or 4-wire measurements. In the standard 2-wire configuration, a single Tungsten tip (per probe) is used to contact the cell at a 45 degree angle. In the case of 4-wire probing, x2 BeCu tips (per probe) are used to contact the cell. The latter has the advantage that the (possible) voltage drop over the current wire is eliminated by measuring the voltage at the sample directly. The wires are electrically isolated from the body. The small manual joystick allows for precision movements in both X and Y directions. The Z-adjustment is handled by a precision screw. This makes it possible to probe small pads. The device is not suited for intensive usage such as in production environments.

     

    Key features:

    Available in 2 or 4-wire configurations

    Max current: 2 Amps

    BNC or banana plug (standard) cable termination

    Magnetic base – for substrate and superstrate configurations

    Small manual joystick for movement in X and Y, precision screw for Z

    Alternative tips available on request

     

    Models:

    2-wire configuration – x1 Tungsten tip (RR-3056)

    4-wire configuration - x2 BeCu tips (RR-3056B)

    High Resolution Solar Cell Probe

    Our high resolution solar cell probes provides a high precision positioning for repeatable IV measurements.  It is designed primarily for probing targets that are approximately 13 microns and larger at 80 TPI resolution (320 μm per 360° turn). It is supplied with a magnetic base and is available in either left or right handed models. 

    The 125 mm x 125 mm scanning area allows positioning on a broad range of solar cell materials. Each axis is spring loaded to prevent backlash, and the control knobs are conveniently placed at the rear of the micropositioner to allow one hand to control all three axes at the same time. The probe mount is electrically isolated from positioner body.

     

    Key features:

    Available in 2 or 4-wire configurations

    High precision positioning

    Max current: 2 Amps

    Left-handed or right-handed models

    BNC or banana plug (standard) cable termination

    Magnetic base - suitable for substrate and superstrate measurements

    Alternative tips available on request

     

    Models:

    2-wire configuration – left handed, x1 Tungsten tip (RR-3057L)

    2-wire configuration – right handed, x1 Tungsten tip (RR-3057R)

    4-wire configuration – left handed, x2 BeCu tips (RR-3057BL)

    4-wire configuration – right handed, x2 BeCu tips (RR-3057BR)

    Solar Cell IV Converter

    The ReRa Solar Cell IV converter (RR-1029) is a dedicated instrument to measure the output of a reference cell (Irradiance and Temperature).  It can be used to measure both open and shunted reference cells. In the case of shunted reference cells, the voltage biasing capability of the instrument will be disabled. A user can operate the instrument directly from the 4.3” touchscreen, or alternatively, via the Tracer IV curve software (via a USB interface). LabVIEW drivers are also available on request.

    When combined with the Tracer IV software, the instrument can be used to perform full IV measurements i.e. the IV converter replaces the sourcemeter. However, this is only applicable to small scale lab based solar cells, as the maximum current is limited to ±200 mA (±5 V). The instrument uses banana plug sockets (for the temperature sensor and reference cell/DUT) and a BNC connector for the TTL output.

    When measuring a reference cell, the following data is displayed on the touchscreen:

     

    All reference cells:

    Temperature (°C/F)

    Irradiance (Wm-2)

    Shutter state

    Open reference cells:

    Short circuit current (Isc)

    Open circuit voltage (Voc)

    Current / Voltage

    Shunted reference cells:

    Voltage

     

    Key features:

    Dedicated, stand alone instrument to measure reference cells

    Replaces the sourcemeter in your IV setup

    Storage of calibration values from multiple reference cells

    Temperature sensor input (4-wire pt100)

    TTL output to control shutter of Solar Simulator

    Large (4.3″) touchscreen

    IV Measurement Electronics (basic IV system)

    The ReRa basic IV system (RR-3060) is a package of some of the key items required to make an IV measurement of solar cells. This includes a source meter, GPIB-USB interface and interface to control the shutter of a Solar Simulator. This enables one to measure IV curves (both dark and illuminated) of solar cells. By controlling the electronic shutter of the Solar Simulator, it is possible to illuminate the solar cell only during the measurement period (which avoids heating of the solar cell between measurements). A 4-wire temperature sensor (pt100) is also included to measure the temperature of the solar cell. This has a USB termination, enabling it to be used with the Tracer IV software.

     

     Key features:

    Measurement of IV curves (both dark and illuminated)

    Current range: 10 pA to 1 A

    Voltage range: 1 µV to 20 V

    Includes GPIB/USB interface

    Solar Simulator shutter control (USB to BNC or sub-D)

    4-wire pt100 temperature sensor (USB interface)

     

    Not included:

    Reference cell

    Probes

    Probe station

    Tracer IV software

     

    Please contact us if you would like to discuss your specific application or require a customised configuration

    Tracer IV Curve Software

    Tracer (RR-5006) is a complete software package for the measurement of IV curves. Data can be exported in CSV, ASCII and XML formats. Tracer provides support for correction to STC (standard test conditions) and report generation according to the IEC 60904-1 standard. With Tracer you will be able to measure the following critical IV parameters:

     

    Isc (Short circuit current)

    Voc (Open circuit voltage)

    Impp (Max current power point)

    Vmpp (Max voltage power point)

    Rs (Series resistance)

    Rshunt (Shunt resistance)

    FF (Fill Factor)

    Efficiency

    Jsc (Short circuit current density)

     

    Tracer is able to control a variety of sourcemeters such as those from Keithley (2400 and 2600 series) and Kepco.

    Additionally, a separate software package (Tracer Analyser, RR-5021) is available for off-line data analysis. This is distributed according to a per seat license arrangement.

     

    Key features:

    Mathematical fitting to the single or double diode model

    Internal database and database viewer

    Integration with Metrohm Autolab potentiostats

    Tracer Configurator – enables configuration of hardware outside of the main Tracer program

    Dark curves

    Compatibility with MySQL and SQL server databases

    Supplier info:

    For even more information, why not visit our suppliers website.

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