E m a i l : s a l e s @ n e w p o r t . c o m • We b : n e w p o r t . c o m

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Photoresponse Mapping of Photovoltaic Cells

Applications

• Photovoltaic prototyping

• Process control

• Detection of flaws, cracks,inclusions

• Accurate efficiency calculations

Newport’s Photoresponse Mapping Kit is designed to scan a photovoltaic cell up to

200 cm2 with a monochromatic beam of light and map the cell’s response to that light.

Various wavelengths can be employed, thus the contribution to photo current by the

cell at different depths can be probed. The kit comes with example software which

displays the photoresponse map as a 3D surface and as a contour plot. Researchers

developing a photovoltaic process can quickly learn important information about the

uniformity of response over the surface of the cell and visualize flows.

For a full description of the experiment, please see Application Note 40 on our website.

Schematic diagram of the set-up. P - polarizer, WP - _ wave plate, PD - photodiode, F - filter wheel,

M - turning mirror, L - focusing lens, BS - beamsplitter.

A picture of the PV cell scanner. XPS motion controller not shown.

BS - beamsplitter. P - polarizer, WP - _ wave plate, PD - photodiode,

F - filter wheel, M - turning mirror, L - focusing lens, BS - beamsplitter

Measured EQE% of the various PV cells by

the Newport QE/IPCE Measurement Kit.

Vertical color lines correspond to wavelengths

of the lasers used in the experiment.

The example software user interface is shown. A 16 mm x 16 mm scan

is shown.

P h o n e : 1 - 8 7 7 - 8 3 5 - 9 6 2 0 • F a x : 1 - 9 4 9 - 2 5 3 - 1 6 8 0

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A p p l i c a t i o n S o l u t i o n s

Photograph of the Si cell and photocurrent maps at 532 nm, 375 nm and 632 nm.

A photoresponse scan of the experimental CIGS PV cell. A drop off of the

signal is seen in the upper right-hand corner even though upon visual

inspection the cell appeared to be uniform. The colors represent

photocurrent and are in arbitrary units.

Photograph (a) and photocurrent maps of an organic PV cell at different

wavelengths: 532 nm (b), 375 nm (c) and 632 nm (d).

Ordering Information

Please see Application Note 40.

Model Description

PRM-KT (M-PRM-KT) Photoresponse Mapping of Photovoltaic Cells

E m a i l : s a l e s @ n e w p o r t . c o m • We b : n e w p o r t . c o m

15A p p l i c a t i o n S o l u t i o n sE

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PV Cell Calibration and Certification Services

• The TAC-PV Lab is ISO/IEC 17025 accredited by the

American Association for Laboratory Accreditation

(A2LA).

• Electrical performance measurements are performed

according to the American Society for Testing

Materials (ASTM) standard E948.

• Measurements are performed under standard AM1.5G

1 Sun conditions

Ordering Information

Model Description

PVCERT Solar Cell Characterization and Certification

The Newport Technology & Applications Center’s Photovoltaic

(TAC-PV) Lab is accredited by the American Association for

Laboratory Accreditation (A2LA) to ISO/IEC 17025. We measure

the electrical performance of photovoltaic cells under simulated

sunlight according to the American Society for Testing Materials

(ASTM) standard E948, and make spectral responsivity

measurements of photovoltaic devices according to ASTM

E1021. All measurements are performed under standard

reporting conditions (SRC) with a temperature of 25˚C, a total

irradiance of 1 Sun (1000 W/m2), and spectral irradiance AM1.5G

(IEC 60904-3).

The Newport TAC-PV Lab practices quality control techniques for

monitoring the validity of tests and calibrations undertaken

including participation in inter-laboratory comparisons or

proficiency-testing programs. All measurements made by the

Newport TAC-PV Lab are traceable to the International System of

Units (SI). All of the customer’s data is kept confidential.

The Newport TAC-PV Lab uses state of the art equipment

including the Oriel Class AAA 8” x 8” Sol3A Solar Simulator and

the Oriel QE-PV-SI (QE Measurement Kit) based on the Oriel

CS260 scanning grating monochromator. Using these

instruments, we perform the following measurements:

• Absolute or relative external quantum efficiency (300 nm to1100 nm) with white light bias

• Precision total area measurement of device

• I-V measurements to derive standard electrical performanceparameters (% efficiency , FF, Pmax, Isc, and Voc)

We welcome requests for prototype PV device performance

measurements or for PV reference cell calibration. Expedited

measurement service is available.

Your ISO/IEC 17025 Accredited Calibration Certificate

will include:

• Measured total area of your device

• EQE and I-V curves of your device

• Electrical performance parameters of your device

• Irradiance spectrum of our solar simulator

• Spectral response of our reference detector

• Expanded uncertainties

In addition to the TAC-PV Lab’s dedicated facility for PV cell

calibration, Newport’s Technology and Application Center (TAC) is

equipped with modern ultrafast lasers, spectroscopy and

multiphoton imaging instruments that enable us to perform many

advanced studies including transient absorption, pump-probe,

non-linear ultrafast spectroscopy, multiphoton imaging, and other

material characterization techniques. These tools and techniques

have allowed us to understand the properties of materials used

in photovoltaic cells on molecular and atomic level.