Spectral response measurements for solar cells

Hartman, John S.; Lind, M. A.

doi:10.1016/0379-6787(82)90099-0

Cited by 30 publications

(18 citation statements)

References 3 publications

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“…With the absolute SR in irradiance mode at λ λ cent being known, the absolute spectral response at all wavelengths in irradiance mode is calculated from R t;irrd mode λ SFλ cent · R t;pwr mode λ; (6) where SFλ cent R t;irrd mode λ cent ∕R t;pwr mode λ cent is the scale factor from the LED measurement and allows for the construction of the entire SR curve in irradiance mode.…”

Section: A Methodologymentioning

confidence: 99%

“…The differential SR method [4][5][6][7][8][9][10] is the most widely used method for measuring the SR of a solar cell. Using this technique, a small modulated (quasi) monochromatic light beam and a more intense steady-state white-light source (the light bias) simultaneously illuminate the solar cell, producing a photocurrent that is the sum of these two sources: a small ac signal superimposed on a larger dc current.…”

Section: Introductionmentioning

confidence: 99%

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Absolute spectral responsivity measurements of solar cells by a hybrid optical technique

et al. 2013

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An irradiance mode, absolute differential spectral response measurement system for solar cells is presented. The system is based on combining the monochromator-based approach of determining the power mode spectral responsivity of cells with an LED-based measurement to construct a curve representing the light-overfilled absolute spectral response of the entire cell. This curve can be used to predict the short-circuit current (I(sc)) of the cell under the AM 1.5 standard reference spectrum. The measurement system is SI-traceable via detectors with primary calibrations linked to the NIST absolute cryogenic radiometer. An uncertainty analysis of the methodology places the relative uncertainty of the calculated I(sc) at better than ±0.8%.

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Section: A Methodologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Absolute spectral responsivity measurements of solar cells by a hybrid optical technique

et al. 2013

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“…The spectral responsivity of a solar cell, R,-which quantifies the wavelength dependence of the cell's photocurrent generation when normalized for the input irradiance or the radiant power of the incident monochromatic radiation-is a very informative and thus useful photovoltaic characteristic [11][12][13][14][15][16][17][18]. Cell spectral responsivity (SR), for example, is used to calculate quantum efficiency, which indicates the cell's electron generation to incident photon conversion efficiency as a function of wavelength.…”

Section: Spectral Response Measurements Of Solar Cellsmentioning

confidence: 99%

Solar Cell Characterization

Hamadani

Dougherty

2015

Semiconductor Materials for Solar Photovoltaic Cells

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The solar cell characterizations covered in this chapter address the electrical power generating capabilities of the cell. Some of these covered characteristics pertain to the workings within the cell structure (e.g., charge carrier lifetimes), while the majority of the highlighted characteristics help establish the macro-performance of the finished solar cell (e.g., spectral response, maximum power output). Specific performance characteristics of solar cells are summarized, while the method(s) and equipment used for measuring these characteristics are emphasized.The most obvious use for solar cells is to serve as the primary building block for creating a solar module. As such, a key pursuit is to manufacture a solar module, or more correctly, to manufacture each unique model or product line of photovoltaic (PV) module, using cells that perform as similarly as possible. To achieve that end, manufacturers conduct quick measurements of mass-produced cells and then allocate them into a few groups or "bins" based on those measurements. The key cell characteristic(s) used for binning are embodied in the cell's electrical current versus voltage (I-V) relationship, Fig. 8.1. From these curves, the cell's maximum power output, short-circuit current , and open-circuit voltage, in particular, are identified.Additional cell parameters and relationships are used to more fully characterize a solar cell. These additional characteristics include, but are not limited to, spectral response, fill factor, series resistance, temperature coefficients, and quantum efficiency. Knowledge of these additional parameters is helpful, for example, when developing, evaluating, and fine tuning a new cell design and manufacturing process. Characterizations that focus on maximizing accuracy, moreover, are especially important for the purpose of creating reference cells. Reference cells serve as transfer standards that can be used by manufacturers and third-party testing

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“…The absolute determination of the SR of a solar cell, if done under appropriate conditions, can be used to predict the short circuit current, I sc , of the cell under any given irradiance spectrum, including the standard air mass 1.5 (AM 1.5) solar spectrum [2][3][4]. The relative (or absolute) SR data of PV cells can be used to adjust for spectral differences between the actual illumination source versus the spectrum assigned to a standard or reference source [5][6][7]. Furthermore, the SR measurements are often used as a diagnostic tool to help understand the performance limitations of the PV device or identify defective areas of a cell.…”

Section: Introductionmentioning

confidence: 99%

“…The most widely accepted method for measuring the SR of solar cells is the differential spectral responsivity (DSR) approach [3,6,8], which allows for introduction of a light bias during the measurement. In this technique, a small modulated (quasi) monochromatic light beam and a more intense steadystate white light source (the light bias) illuminate the solar cell, producing a small AC signal superimposed on a larger DC current.…”

Section: Introductionmentioning

confidence: 99%

Versatile light-emitting-diode-based spectral response measurement system for photovoltaic device characterization

et al. 2012

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An absolute differential spectral response measurement system for solar cells is presented. The system couples an array of light emitting diodes with an optical waveguide to provide large area illumination. Two unique yet complementary measurement methods were developed and tested with the same measurement apparatus. Good agreement was observed between the two methods based on testing of a variety of solar cells. The first method is a lock-in technique that can be performed over a broad pulse frequency range. The second method is based on synchronous multifrequency optical excitation and electrical detection. An innovative scheme for providing light bias during each measurement method is discussed.

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Spectral response measurements for solar cells

Cited by 30 publications

References 3 publications

Absolute spectral responsivity measurements of solar cells by a hybrid optical technique

Absolute spectral responsivity measurements of solar cells by a hybrid optical technique

Solar Cell Characterization

Versatile light-emitting-diode-based spectral response measurement system for photovoltaic device characterization

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