Photovoltaic EL Imaging

An overview of Andor's solutions for PV EL

As solar cells have come of age, there has been an increasing demand for photovoltaic modules to become more efficient at solar energy conversion, and cheaper to find their way into households around the globe. Current high costs of solar energy are directly linked to the relatively low efficiency of modern panels and this, in turn, is influenced by defects within solar cells and panels. Such structural defects may stem from challenges in silicon processing and the quality of crystalline lattices or they may be caused by faulty electrical connections on otherwise functional cells. To address these issues, an array of photo-emissive diagnostic and quality control tools for solar cell research, based around camera detection systems, has been rapidly developing over the past few years.

Photovoltaic Electroluminescence Imaging

Analysis and detection of structural defects during production cycle. Spatially resolved detection of defects and feedback loops for corrective measures in the production processes. High reproducibility of measurement results. Speed: fast detection & analysis. <1s. Minimizes "down times". Fast returns on investment. Modular & Flexible: applicable at many stages of production process allowing for flexible reshuffling of resources.

The set-up for PV EL Imaging is simple, consisting of: NIR Sensitive Camera with lens Darkened enclosure Solar Cell / Module Power Supply

Scientific CCD cameras are very well suited for industrial, inline solar cell quality control processes. CCDs with their two-dimensional array sensors, high Quantum Efficiency (QE), low read noise and down to sub-second frame read out, represent excellent tools for high-throughput testing of individual photovoltaic cells and larger panels. The sensitivity inherent to CCD-based detection is well placed to harness the phenomenon of induced electroluminescence (EL) from solar cells and modules, utilizing weak emission in the Near Infra-Red (NIR) to detect shunts, crystalline defects and broken finger electrodes during cell manufacturing process.

Photovoltaic Electroluminescence Imaging

Electron Multiplying (EM) CCD technology, which combines single photon sensitivity and high QE, offers additional advantages when dealing with low-light EL signals, making it possible to record the faintest of signals. Including CCD / EMCCD technology in solar cell / photovoltaic research can significantly improve the quality of solar panels as well as contribute towards development of cleaner sources of energy.

Multimedia Library
Application Images (5)
Publications Database
Evaluation of genetic damage in tobacco and arsenic exposed population of Southern Assam, India using buccal cytome assay and comet assay
Chloroquine-induced glioma cells death is associated with mitochondrial membrane potential loss, but not oxidative stress
Optimising the signal-to-noise ratio in measurement of photon pairs with detector arrays
Statistics of twin-beam states by photon-number resolving detectors up to pump depletion
The Einstein-Podolsky-Rosen paradox in twin images
Spatial properties of twin-beam correlations at low-to high-intensity transition
Coherence properties of high-gain twin beams generated in pump-depletion regime
The influence of non-imaging detector design on heralded ghost-imaging and ghost-diffraction examined using a triggered ICCD camera
The effect of moisture on the degradation mechanism of multi-crystalline silicon photovoltaic module
The effect of encapsulant discoloration and delamination on the electrical characteristics of photovoltaic module
Fabrication of EuF 3-Mesocrystals in a Gel Matrix
Evolution of fluorescence resonance energy transfer between close-packed CdSeS quantum dots under two-photon excitation
Synchrotron UV Visible Multispectral Luminescence Microimaging of Historical Samples
Measurement of infrared level lifetime by upconversion luminescence
Synthesis, Crystal Structures, and Properties of Novel Heterometallic La/Pr Cu K and Sm/Eu/Tb Cu Coordination Polymers
Direct Spectroscopic Evidence of 8-and 9-fold Coordinated Europium (III) Species in H2O and D2O
Correlation between the surface state and optical properties of S6 site and C2 site in nanocrystalline Eu3+: Y2O3
Competition between surface trapping and nonradiative energy transfer to gold nanofilm
Optical characterizations of Er3+-doped KLa (PO3) 4 phosphate crystals
Observation of spontaneous Bose-Einstein condensation of excitons at sub-Kelvin temperatures

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