CEP-25RR Spectral Response/IQE measurement System

CEP-25RR

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CEP-25RR　Spectral Response/IQE measurement System

The CEP-25RR has been designed to irradiate solar cells with monochromatic light of constant energy and constant photons without wavelength dependence,and measures the spectral response and quantum efficiency of various solar cells.CEP-25RR.The system can measure the spectral response and spectral reflectivity with a single system to deterimine the internal quantum efficiency(IQE)

Spectral response and reflectance measurement can be performed on the same surface of the sample with the same light.

Equipped with white bias light source as standard,spectral response under pseudo sunlight and I-V chracterstics as a solar simulator with the AM-1.5G can be easily measured.

Catalog（PDF）

Measurement data

Red:EQE data

Green：Reflectance

Blue:IQE

This is an example of internal quantum efficiency(IQE) measurement data of a crystalline Si solar cell.

For example,for a crystalline Si solar cell,

Long-wavelength sensitivity is reduced.⇒The crystal itself degraded.

Short-wavelength sensitvity is reduced.⇒There is a problem with surface diffusion layer.

Those can be determined from internal quantum effciency measurement data.

The data is EQE measurement data of two-junction solar cells consisting of crystaline silicon and amorphous silicon.By using color filters, it is possible to measure the EQE of each of the top and bottom cells.

Feature

Spectral response measurement by constant energy irradiation

the light intensity is adjusted with a continuos density variable ND filter,and constant energy light without wavelength characteristics is irradiated. The spectral response of the sample can be calculated from the irradiation light intensity and the measured photocurrent. The same measurement can be performed performed under white light or color bias light. Bias voltage can be set.

Measurement of quantum effciency by constant photon irrdiation

The light intensity is adjusted with a continuous density variable ND filter,and constant photon light is irradiated. The quantum effciency of the sample can be calculated from the irradiation light intensity and the measured photocurrent. The same measurement can be performed under white light or color bias light. The bias voltage can be set.

Diffuse reflection measurement and internal quantum effciency

The light intensity is adjiusted and constant photon light is irradiated to the sample. After setting a soler cell on the integrating sphere,the diffuse reflectivity can be measured with the double beam optical system, Also, the interal quantum efficiency is calculated from the quantum efficiency and diffuse reflectivity meaurement.

Specifications

Mesurement	Spectral response,quantum efficiency,I-V curve
Wavelength range	300～1700nm（～2000 can be expanded as an option)
Light source for monochromatic light	Xe lamp + Halogen lamp
lrrdiation area for monochromatic light	20×20mm（can be expended to 50×50mm as an option）
Wavelength purity	Variable,Max 20nm
lrrdiation intensity	5～50μW/cm²or more（Wavelength 350～1200nm）
Positional non-uniformity	Within ±2.5%
Constancy of wavelenth intensity	Within ±3%
Irradiation mode	Constant energy and constant photon
Meaurement mode	DC and AC（13～100Hz）
Light source for White light	Xe lamp (Auto color bias)
Irrdiation area or White light	20×20mm
Spectral match	JIS C8912・C8933 ClassA
Reflectivity measurement renge/items	0～100% Dark/Baseline/Reflectivity measurement
Measurement method	Doube beam optical system:sample and reference beam are switched by the sector mirror

Standard Configuration

●Xe lamp 500W (for monochromatic light)

●Xe lamp 500W Power supply(for monochromatic light)
●Halogen lamp 400W(for monochrmatic light)
●Halogen lamp 400W power supply(for monochromatinc light)
●Light condensing optical system(for 2 light source type)
●Monochromator
●Grating 600line/mm brazed at 300nm
●Grating　600line/mm brazed at 500nm
●Grating　600line/mm brazed at 1600nm
●Light emitting optical system(auto continuous density variable ND filter)
●Variable frequency chopper　DC/13～100Hz
●High order light cut filters
●Xe lamp 150W（for White light）
●Xe lamp 150W Power supply(for White light）
●Optical system for white light （Bulit AM1.5G filter）
●Color filter holder
●Sample compartment
●Source meter,Lock-in amplifier
●Si Photo diode detector(for monochromatic light and white light)
●TP unit
●Si detector holder

●Reflectivity measurement optical system( including a standard diffusion plate)
●Cable for solar cell(XLR-Allgator clip)
●Interface unit
●Note PC
●Instruction Manual

Option

●Various sample holders

●Automatic filter switching mechanism for white bias(ND filter / color Filter)

Dimensions

●Power：AC100V ±10V 50/60Hz 20A
●Main unit：Approx.W1750×Ｄ950×H1460mm
●Weight：Approx.400Kg