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Spectral Response / Quantum Efficiency Measurement System

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Spectral Response / Quantum Efficiency Measurement System

Model: LSQE-R

Category: Automatic/Industrial Machines & Equipments / Testing Equipment / Inspecting/Measuring Instrument and Parts

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Characteristics

● It can calibrate and measure spectral response / quantum efficiency
with setting up the reference detector
● Czerny-Turner monochromator with low stray light < 10-5, higher repetition and stability, and providing high-purity monochromatic light
● Built-in AM1.5G spectrum, customers can also input and calculate the short-circuit current of full spectrum
● High-resolution measuring instrument with low signal noise captures signals, providing accurate and stable measurement results without operating the lock-in amplifier for complicated settings
● Measuring the energy gap of solar cell materials and provide important material parameters for customers
● Include DC measurement module integrated into the system, and no need to remove any hardware equipment
● Adding bias voltage is used to modulate the junction band structure and it can simulate the photo-response under different band bending conditions. The carrier collection efficiency can be evaluated with forward / reverse bias conditions
● Via bias light function to evaluate some types of solar cells which have photoluminescence nonlinear properties (option)
● Evaluation of carrier collection efficiency (Option)
● Used with temperature control platform to study temperature coefficient and provide correlation coefficient between energy gap and short circuit Jsc current (Option)
● The evaluation study of light soaking or light induced degradation (LID)
(Option)
● Reflectance measurement module can be installed to provide internal
quantum efficiency measurement, and customers can also input reflectance data to calculate internal quantum efficiency (Option)
● Dark current-voltage (IV) curve measurement and analysis parameters extraction (Option)
● The hardware can be customized and expended according to the demand of users (Option)

Specifications

Spectral Response / Quantum Efficiency Measurement System

Different photovoltaic detector and the solar cell from single PN junction to multiple junction all have different spectral response. Via spectral response, we can analysis the energy gap, light loss, electric loss, junction quality, diffusion length, carrier collection efficiency, temperature coefficient, and the current matching condition of multi-junction solar cell which will help to understand the characteristics of detector, solar cell and contribute to the improvement of the process. The system adopt high efficiency collection and stable measurement module which provide high purity monochromatic light. Furthermore, with advance noise ratio and high-resolution captures signals to obtain fast and accurate measurement.

Item Specification Content
Light Source System	Wavelength range: 300~1100nm (Other Optional: 200nm~400nm, 1100nm~1400nm & 400~2000nm or extend to 3000nm) 75W Xe light source: with high efficiency light collection module Optical Stability: ≤ 2.0% Three-axis fine-tuning function with light source position Timer with using light
Monochromatic System	Focal Length: ≧110 mm Cover Range of Grating wavelength: 300~1100nm (or another wave band) Aperture Ratios: ≤f/3.9 Wavelength resolution: 1, 2, 5, and 10 nm (system default) or customized Scan interval: 0.1-500nm, adjustable Wavelength accuracy: ±0.6 nm
Optical image system	Spot can be ≤100um diameter with microscope module: Adjustable and customized Camera resolution: ≧16 million pixels Total gain: 4X-100X Image resolution: ≤3 micron or more of, can also be used with different objective lenses to observe large samples
Automatic filter system	Up to 6 optical filters can be placed. Automatic or manual control with the monitor for showing current position
Optical Chopper	Frequency Range: 4~500Hz Frequency resolution can be 0.01Hz, stability <±0.05Hz
Sample Measurement Platform	Manual Sample probe platform A minimum of 4 probe holders can be placed on the platform The size of sample can be placed: 5 mm2 ~ > 300 cm2 三軸微調探針座: 2 sets, Triaxial resolution 2μm Triaxial maximum stroke 12mm Probe holder: Magnetic and insulation base One box of Tungsten steel Probe: Probe size can be matched with probe holder function and 200 tungsten needles Another Sample or customized platform
Calibration detector	Si (200~1100nm) Other Optional: InGaAs (1000~2000nm), Ge (900~1800nm), or another customized and with the third part of traceable certification
Data Acqusition System	AC mode, DC mode, DC bias and Biased light collection mode (current <20mA) Measuring source table minimum current gear: 2 nA Automatic switching of current gear: 20 nA~ 20 mA Measurement source table minimum accuracy: 20 pA Measuring source table maximum output bias voltage range: ±10V (currency <20mA) Measurement repeat accuracy: Repeatability of the integral of the solar spectrum curve within ±2% Measure the specific illumination wavelength and stability of current time at a specific bias Measure the current and voltage curves under no light (-10V ~ 10V maximum current: 20mA), Voltage scanning direction can be set up. Measure current and voltage curves for specific monochromatic illumination (-10V ~ 10V maximum current: 20mA), Voltage scanning direction can be set up. Measure the current-voltage hysteresis curve in the forward reverse bias scan range Another optional: measure arbitrary random current and voltage curves without random effects of components
Software Measurement	Absolute light intensity correction Spectral response/ External quantum efficiency measurement Automatically and immediately calculate short circuit current density Automatically calculated single wavelength short circuit current External reflectivity is introduced into the calculation of internal quantum effect (IQE) Solar cell material energy gap calculation Observe sample measurement of images instantly; and functions of storing image. Database record for history tracing Graphical interface and Data export format: Linear / Log scale with zoom capability; ASCII (.txt) and Graph (.jpg) export Option: Light IV curve measurement and calculation of solar cell parameters, including Voc, Isc, Jsc, Vmax, Imax, Pmax,Fill Factor (FF), Efficiency, Rs, Rsh. Dark IV curve measurement can provide further information on the saturation curre- ntand ideal factor of the gap interface quality
Shielding Case	Movable activity gate The function of electromagnetic screen
Bias Light	Single or dual wavelength of tungsen halogen light source (for tandem or triple junction measurement); intensity adjustable Fiber couple path (or other optical couple option)
Other Optional	Internal quantum efficiency module White light, LED or ther bias light Automatically XY scanning platform

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