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Sciencetech Quantum Efficiency Measurement System (PTS-2-QE) allows for SR, QE and IV measurements with user friendly software. The system includes a main xenon arc lamp, monochromator with automated order sorting filters, a steady-state solar simulator Class AAA bias light source, IV tester, reference detector, measurement electronics, computer, and all software required to measure solar cell characteristics. The PTS-2-QE system provides users with a light tight sample chamber for all measurements. There is also an optional upgrade for IQE measurements. Shielded and light tight test area enclosure has convenient removable cover allowing access from top, front and sides.

The System performs:

• Induced Voltage (IV) : VOC , ISC, Rshunt, Pmax, efficiency %, and fill factor
• Spectral Response : 250 - 2500 nm scanning range 
• Quantum Efficiency 
• Photocurrent measurement : Resolution 10 picoampere to 10 microampere.
• IQE measurement upgrade available 
• Monochromatic light power up to 125 mW
• Keithley 2400 series source meter
• Stanford SR800 series lock-in amplifier
• Light-tight measurement chamber
• Manually controlled shutter
• Bias voltage range of 0 to 200 V
• User-friendly software for data acquisition

SCIENCETECH Inc. has been designing and manufacturing modular optical spectroscopy instruments and components for over 30 years. They are widely used all over the world in research laboratories, universities and companies. Sciencetech instruments are designed with the researchers in mind and feature fully adjustable controls for research flexibility. All Sciencetech systems incorporate modular design and adherence to industry standards for easy integration with other supplier’s instruments and components

Photovoltaic Testing System (PTS) Models 

SCIENCETECH Inc. designs and fabricates four different variants of Photovoltaic Testing System (PTS), as shown in the following table, for implementation of different experimental methods.

Sku: 175-9002

The PTS-2-QE system allows an overall "external" quantum value measurement, which is considered the most important factor in cell testing. It includes all the Spectral Response equipment of the PTS-1, as well as a bias light and additional electronics and software to seamlessly allow user-friendly measurements of Quantum Efficiency. The PTS-2 can be upgraded to include Internal Quantum Efficiency measurements, or to include the necessary parts to allow Constant Photocurrent Method measurements (PTS-3).
PTS-2-QE Includes:
-IV Testing
-Spectral Response
-Quantum Efficiency/IPCE

(PTS-2-QE) Quantum Efficiency/IPCE System

Sku: 175-9004

The PTS-3-DBPM has the same ability to measure IV, Spectral Response, and Quantum Efficiency as the PTS-1 and PTS-2 systems, but adds the powerful technique of the Dual Beam Photoconductivity Method. The DBPM system is based on maintaining constant photocurrent over the range of photon energy to get constant quasi-Fermi levels. Furthermore, the DBPM system has the additional capability to vary the bias light source intensity. This changes the electron-hole and quasi-Fermi levels to yield additional information about defect states. Please speak to a Sciencetech Technical Specialist for further information.
PTS-3-DBPM Includes:
-IV Testing
-Spectral Response
-Quantum Efficiency/IPCE
-DBPM Measurements

(PTS-3-DBM) Dual Beam Photocurrent Method

Sku: 175-9006

The PTS-4-SSP allows the user the same ability to measure IV, Spectral Response, and Quantum Efficiency, and includes CPM as the PTS-1, 2, and 3-CPM systems, but adds the powerful Steady State Photoconductivity (SSP) method to the extensive tools already available. The steady state photoconductivity measurements give information about the nature of defects, mobility-lifetime products, and the transport and recombination kinetics of photogenerated carriers. Please speak to a Sciencetech Technical Specialist for further information.
PTS-4-SSP Includes:
-IV Testing
-Spectral Response
-Quantum Efficiency/IPCE
-CPM Measurements
-SSP Measurements

(PTS-4-SSP) Steady State Photoconductivity System

Sku: 179-9002

Target size: 350x350mm
DAQ: 16 bit
Detector size : 20x20mm 
Detector Type: SCI-REF-LR
Connectivity: 1 x USB2.0
Power Requirements: 120VAC x 4A / 220VAC x 2A
Dimensions: 600x600x125

(UJP-350-LR-16) U-Jig package, 350x350mm target, 16bit DAQ

Sku: 175-9007

For Internal Quantum Efficiency, instead of attempting to measure reflectance losses directly using an integrating sphere method, Sciencetech determines total QE losses by making two QE measurements under different conditions which emphasize external surface effects, allowing losses due to reflection and scattering to be inferred more accurately than would normally be possible to measure. This allows a wider range of sample sizes, and provides accurate, precise information on IQE.

Sku: 175-9003

The PTS-3-CPM allows users the same ability to measure IV, Spectral Response, and Quantum Efficiency as the PTS-1 and PTS-2, but adds the powerful Constant Photocurrent Method (CPM). The CPM system illuminates the sample solar sell with a bias solar light source while a separate light source is modulated to cover a specified spectrum. The bias source ensures that the signal is not dominated by the non-linear response at low-level illumination, but rather gives a baseline response dependent on the wavelength of the modulated source. This allows for a highly precise measurement of defect density. Please speak with a Sciencetech Technical Specialist for more information.
PTS-3-CPM Includes:
-IV Testing
-Spectral Response
-Quantum Efficiency/IPCE
-CPM Measurements

(PTS-3-CPM) Constant Photocurrent Method System

Sku: 175-9005

The PTS-3-PTD has the same capabilities to measure IV, Spectral Response, and Quantum Efficiency as the PTS-1 and PTS-2 systems, but adds the powerful photothermal deflection spectroscopy (PDS) method allowing for the direct measurement of the sub-gap absorption of the sample by utilizing the mirage effect. Please speak to a Sciencetech Technical Specialist for further information. 
PTS-3-PTD Includes:
-IV Testing
-Spectral Response
-Quantum Efficiency/IPCE
-PDS Measurements

(PTS-3-PTD) Photothermal Deflection System

Sku: 179-9001

Target size: 100x100mm
DAQ: 16 bit
Detector size : 20x20mm (apertured to 12.5x12.5mm)
Detector Type: SCI-REF-LR
Connectivity: 1 x USB2.0
Power Requirements: 120VAC x 4A / 220VAC x 2A
Dimensions: 200x200x125

(UJP-100-LR-16) U-Jig package, 100x100mm target, 16bit DAQ

Sku: 179-9003

Target size: 500x500mm
DAQ: 16 bit
Detector size : 20x20mm
Detector Type: SCI-REF-LR
Connectivity: 1 x USB2.0
Power Requirements: 120VAC x 4A / 220VAC x 2A
Dimensions: 800x800x125

(UJP-500-LR-16) U-Jig package, 500x500mm target, 16bit DAQ

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