Quantum Efficiency

The PTS-1-SR system includes a lamp and monochromator for a tunable light source, which is coupled to a high sensitivity source meter with measurement software. This user-friendly system is the most powerful Spectral Response system currently on the market, but its true power is the ease of upgrading from the base PTS-1 to the more powerful PTS-2-QE (Quantum Efficiency) or PTS-3-CPM (Constant Photocurrent Method). Designed for researchers who have limited budgets but want to start work immediately, this allows the ability to do baseline studies until additional funding for the full QE or CPM system becomes available.
Please speak to a Sciencetech Technical Specialist for further information.
PTS-1 Includes:
-Spectral Response and EQE measurements

$ 38,672.00

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
-External Quantum Efficiency - IPCE

*Please note that upgrading to PTS-3-CPM requires the return of the entire PTS-2-QE to Sciencetech's factory for upgrade - it cannot be upgraded in the field.

$ 42,500.00

The PTS-2-IQE system allows an overall external quantum efficiency value measurement as well as internal quantum efficiency measurements using an integrating sphere. 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-IQE Includes the capability to perform the following measurements:
- Current Voltage (I-V) Testing
- Spectral Response
- External Quantum Efficiency/IPCE
- Internal Quantum Efficiency
- Reflectance

$ 47,500.00

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

$ 92,500.00

The PTS-3-DBM 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 photocurrent (DBM) method. The DBM system is based on maintaining constant photocurrent over the range of photon energy to get constant quasi-Fermi levels. Furthermore, the DBM 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-DBM Includes:
-IV Testing
-Spectral Response
-Quantum Efficiency/IPCE
-DBM Measurements

$ 93,800.00

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

$ 94,750.00

The PTS-4-SSP is Sciencetech’s flagship measurement system. The PTS-4 includes all the measurement extensive measurement tools and capabilities of the PTS 1,2 and 3 and adds the powerful Steady State Photoconductivity (SSP) method. Steady state photoconductivity (SSP) measurements give information about the nature of defects, mobility-lifetime products, and the transport and recombination kinetics of photogenerated carriers. Since the states between quasi-Fermi levels act predominantly as recombination centres, steady state photoconductivity is sensitive to both the density and the nature of these states.

The PTS-4-SSP uses the PTS integrated monochromatic light source to perform steady state photoconductivity measurements. To perform SSP measurements the incident flux is first measured using the provided calibrated reference detector in AC mode. After system calibration is performed the light source chopper is turned off and set to the open position for DC measurements.

Under DC illumination the photocurrent is measured at each wavelength using the included electrometer.

A relative value for the absorption coefficient can be obtained from studies of the sample using the included CPM technique.

Reflectivity measurements are not included with the system and are generally performed using a secondary instrument.

The volume generation rate can be calculated from the measured values of incident flux, the sample thickness, relative absorption coefficient and reflectivity profile. With measurements of the photocurrent and volume generation rate the steady state photoconductivity can be determined.

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

$ 124,500.00