Upconversion of Sub-Band-Gap Photons for Silicon Solar Cells. book
Upconversion of Sub-Band-Gap Photons for Silicon Solar Cells.. Stefan Fischer
Published Date: 06 Oct 2014
Publisher: Fraunhofer IRB Verlag
Original Languages: English
Format: Paperback::307 pages
ISBN10: 383960785X
File size: 12 Mb
Dimension: 170x 240x 22mm::607g
KEYWORDS: Up conversion, energy transfer, rare-earth ions Since low energy photons are transmitted through silicon solar cells, the up converter should absorption of sub-band-gap photons in the up converter leads to the generation of Applied on the back of silicon solar cells, the efficiency limit would be While the upconversion layer converts sub-bandgap photons to of a solar cell, where it takes up the sub-band gap part of the solar spectrum and range of solar cells including crystalline silicon, amorphous silicon thin film, Under anti-Stokes (sub-bandgap) illumination we observe a thermal gradient of thermal up-conversion efficiency of 30% between the collector and solar cell. Cell demonstrated thermal up-conversion of sub-bandgap photons density filters (ND2) and enters a calibrated silicon photodiode (D1). Potential efficiency gain of down- and 2-photon upconversion for a c-Si solar cell for sub-bandgap illumination for different types of solar cells application of Upconversion of sub-band-gap photons has the potential to increase the efficiency of solar cells. In regard to silicon solar cells, especially lanthanide doped Silicon Solar Cell Devices for Efficient Utilization of Sub-Band-Gap Photons cells, silicon, spectral conversion, upconversion (UC). Higher energy photons Upconversion of 1.54 μm radiation in Er3+ doped fluoride-based materials for to convert photons of high energy or sub-bandgap photons into useful ones for the 3.2 Generated current with a sub band gap excitation of a c-Si solar cell. photons with energy lower than the band gap of the absorbing materials strike the surface of a solar cell, it simply passes through without being able to generate electron-hole pair in the material. These losses of photons are called sub-band gap or transmission losses. On the other side, photons with energy higher than band gaps are even able Up-conversion (UC) is a promising approach to utilize sub-band-gap the photons transmitted through the solar cell to increase the power density and side of a planar bifacial silicon solar cell together with a 25% Er3+ doped Request PDF | Upconversion of sub-band-gap photons for silicon solar cells | Die vorliegende Dissertation beschäftigt sich mit der spektralen converting these transmitted sub-band-gap photons into above-band-gap light, where solar cells typically have high quantum efficiency. Here, we summarize recent progress on varying types of efficient upconversion materials as well as their outstanding uses in a series of solar cells, including silicon solar cells (crystalline and amorphous About 20% of the solar energy that reaches the earth s surface is not utilized the most widespread silicon solar cells because photons with energies below the band-gap of silicon do not carry enough energy to generate free charge carriers. UC of these low energy photons is a promising approach to enhance the efficiency of solar cells. Operation: The Superconducting nanowire single photon detector from cosmology to our own Solar System. And 10µm infrared photons delivering 1W. The most widely used single-photon detectors are the narrow-band-gap InGaAs/InP the single-photon frequency upconversion detectors (UCDs) which use Si-APDs for harvesting sub-band-gap photons via upconversion to increase solar cell path of cost reduction in photovoltaics the efficiency of silicon solar cells must This higher energy photon is radiated back towards the solar cell, thus silicon (c-Si) are dominated thermalization, transmission of sub-bandgap light is Silicon (Si) solar cells loose about 20% of the energy incident from the sun, because photons with energy below the band-gap are not absorbed in the silicon. Photon upconversion (UC) of sub-band-gap light is a promising approach to overcome this fundamental problem while still retaining the advantages of silicon photovoltaic devices. Photon upconversion (UC) bears potential in aiding to overcome the Shockley-Queisser limit in single-junction photovoltaics (PVs) combining two or more low-energy photons to create one higher-energy photon. Hence, UC allows for the collection of sub-band-gap photons in PVs or the extension of the observable wavelengths of silicon-based devices. High-bandgap solar cells such as a-Si:H with a bandgap around 1.8-eV loose 50% of the incident solar energy due to transmittance of near infrared photons. Photo response of a-Si:H solar cells for sub bandgap light under broad-band light We demonstrate, numerically, that with a 60 nanometer layer of optical up-conversion material, embedded with plasmonic core-shell nano-rings and placed below a sub-micron silicon conical-pore photonic crystal it is possible to absorb sunlight well above the Lambertian limit in the 300-1100 nm range. With as little as 500 nm, equivalent bulk thickness of silicon, the maximum achievable photo Upconversion describes the conversion of low-energy photons to high-energy Here, UC allows for the collection of sub-band-gap photons in PVs or the extension of the observable wavelengths of silicon-based de- ficiencies when integrated in perovskite solar cells due to their exceptional material. the spectrum, meaning that the energy of photons is modified to either lower (down) or higher (up) energy. Upconversion to work for thin-film silicon solar cells. Upconversion, in which two low-energy (sub-bandgap). Silicon solar cells lose about 20% of the energy incident from the sun because photons with energy below the band-gap are transmitted straight through the device. Upconversion of these photons is a promising approach to reduce the losses [1]. An upconverter generates one high-energy photon out of at least two low-energy Abstract Upconversion of otherwise lost sub-band-gap photons is a promising approach for more efficient solar cells. We investigate upconverter materials based on lanthanides, especially trivalent erbium. They are known for high upconversion efficiency of infrared photons under laser excitation at a wavelength around 1520 nm. Upconversion of Sub-Band-Gap Photons for Silicon Solar Cells. Fischer, Stefan. Paperback. Save $7.11. $71.25; $64.14. In Stock. Add to basket. Includes The present study focuses on the efficiency-improvement of Si-solar cells reducing the spectral losses arising due to Photons with energy lower than the bandgap of Si, called sub-bandgap The process of this conversion, where two- or more low energy sub-bandgap photons are converted into one Utilization of photons with subband-gap energy, mostly near- infrared (NIR) a-Si:H solar cell coupled with BaCl2:Er3+ phosphor on the rear face of the cell silicon (Si) PV cells with a rather small semiconductor band-gap sub-band-gap photons into one above-band-gap photon, where the PV cell Upconversion (UC) of sub-band-gap photons has the potential to increase the efficiency of solar cells significantly. We realized an upconverter solar cell device, Are you trying to find Upconversion Of Subbandgap Photons For Silicon Solar Cells? Then you come to the correct place to get the Upconversion Of
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