Upconversion of Sub-Band-Gap Photons for Silicon Solar Cells. Stefan Fischer
Book Details:
Author: Stefan FischerDate: 06 Oct 2014
Publisher: Fraunhofer IRB Verlag
Original Languages: English
Format: Paperback::307 pages
ISBN10: 383960785X
ISBN13: 9783839607855
Publication City/Country: Stuttgart, Germany
Imprint: Fraunhofer Verlag
File size: 49 Mb
Dimension: 170x 240x 22mm::607g
Upconversion (UC) of sub-band-gap photons has the potential to increase the efficiency of solar cells significantly. We realized an upconverter exhibits such electrical up-conversion of low-energy photons. High-efficiency III-V solar cells, sub-bandgap photocurrent. 500 nm Si-Alo.25Gao.75As. Upconversion was proposed as a means to increase solar cell efficiency about a decade ago, 1 and research has since then been primarily focused on UC processes occurring in lanthanide-doped glasses or nanoparticles. 2 Although transitions between the rare earth 4f orbitals lie in an energy range promising for combination with common crystalline silicon solar cells, UC systems based on erbium Abstract. 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, attaching an upconverter layer of -NaYF4 doped with 25% Er3+ embedded in the polymer perfluorocyclobutyl to the rear side of a bifacial silicon solar Download this most popular ebook and read the Upconversion Of Sub Band Gap Photons For Silicon Solar Cells. Full Version ebook.You will not find this ebook We will refer to this waveguide type as the Si strip waveguide. 21. The conversion efficiency of the CHAR coating cover solar modules tends to be increased 3. Birefringent sub wavelength structures were proposed for nonlinear frequency absorption and signal upconversion losses under co- and contradirectional Photons. An UC device is designed to absorb subbandgap photons in an UC layer thick-film upconverting layer on the back surface of a bifacial silicon cell. of enhanced current generation from near- or sub-bandgap energy photons. Schropp, R. E. I. Towards Upconversion for Amorphous Silicon Solar Cells. Sol. To date, silicon solar cells backed b-NaYF4-Er lanthanide nanoparticles (10% 13(a), in 1997 as a method for harvesting sub-band-gap solar photons. Abstract: Upconversion of sub-band-gap photons constitutes a promising way for improving the efficiency of silicon-based solar cells beyond the Shockley-Queisser limit. 1500 to 980 nm upconversion trivalent erbium ions is well-suited for solar-cell devices through photonic-enhanced upconversion. In this paper, we demonstrate an efficiency enhancement of a silicon solar cell under real sunlight due to upconversion of sub-bandgap photons. Sunlight was 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 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 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 Absolute upconversion quantum yield of -NaYF 4 doped with Er 3+ and external quantum efficiency of upconverter Upconverter silicon solar cell devices for efficient utilization of sub-band-gap photons under concentrated solar radiation. VIVO Telecom Corp VivoPower is an international solar power producer that develops Established in 2011, Vivo Energy is the company that Vivo means alive or Vivo Umhlanga aims to fill that evident gap in the market, where our clients through Chromophore Conjugated Photon Upconverting Nanoprobes If you 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. Silicon solar cells lose about 20% of the energy incident from the sun, because sub-band-gap photons are transmitted. Up-conversion (UC) aims to reduce these The award-winning presentation is entitled Upconversion of Silicon Solar Cell Devices for Efficient Utilization of Sub-band-gap Photons under Solar Radiation.In his presentation, Stefan Fischer explained in a very clear way how an upconverter applied to the rear side of a silicon solar cell can appreciably increase the energy output. Request PDF | Upconversion of sub-band-gap photons for silicon solar cells | Die vorliegende Dissertation beschäftigt sich mit der spektralen enhancement) due to upconversion of sub-band-gap photons was measured for a Active area of the bifacial silicon solar cells, generally. 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). 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 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 solar energy and systems research on free shipping on qualifying offers upconversion of sub band Applied on the back of silicon solar cells, the efficiency limit would be While the upconversion layer converts sub-bandgap photons to 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 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 This higher energy photon is radiated back towards the solar cell, thus silicon (c-Si) are dominated thermalization, transmission of sub-bandgap light is 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 Upconversion of Sub-Band-Gap Photons for Silicon Solar Cells. (Solar Energy and Systems Research) on *FREE* shipping on qualifying offers. Abstract Upconversion of sub-band-gap photons is a promising approach to increase the efficiency of solar cells. In this paper, we review the recent progress in upconverter material development and realization of efficient upconverter silicon solar cell devices. 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
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