203 research outputs found
Porous silicon solar cells
We developed a new process for the fabrication of crystalline solar cell, based on an ultrathin silicon membrane, taking advantage of porous silicon technology. The suggested architecture allows the costs reduction of silicon based solar cell reusing the same wafer to produce a great number of membranes. The architectures combines the efficiency of crystalline silicon solar cell, with the great absorption of porous silicon, and with a more efficient way to use the material. The new process faces the main challenge to achieve an effective and not expensive passivation of the porous silicon surface, in order to achieve an efficient photovoltaic device. At the same time the process suggests a smart way to selective doping of the macroporous silicon layers despite the through-going pores. © 2015 IEEE.
SciVal Topic Prominence
Topic: Porous silicon | Silicon | macroporous silicon
Prominence percentile: 66.984
Author keywords
nanofabricationporous siliconsilicon nanoelectronicssolar cells
Indexed keywords
Engineering controlled terms:
Crystalline materialsNanoelectronicsNanostructured materialsNanotechnologyPorous siliconSiliconSilicon wafersSolar cells
Engineering uncontrolled terms
Crystalline silicon solar cellsCrystalline solar cellsMacro porous siliconPhotovoltaic devicesPorous silicon surfacesPorous silicon technologySilicon nanoelectronicsUltrathin silicon membrane
Engineering main heading:
Silicon solar cells
ISBN: 978-146738155-0
Source Type: Conference Proceeding
Original language: English
DOI: 10.1109/NANO.2015.7388710
Document Type: Conference Paper
Sponsors: Nanotechnology Council
Publisher: Institute of Electrical and Electronics Engineers Inc.
References (9)
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1
(2012) International Technology Roadmap for Photovoltaics Results 2012. Cited 24 times.
ITRPV, Third Edition, Berlin 2012
www.ITRPV.net
2
Lehmann, V., Honlein, W., Stengl, R., Willer, J., Wendt, H.
(1992) Verfahren Zur Herstellung Einer Solarzelle Aus Einer Substratscheibe. Cited 6 times.
German patent DE4204455C1; Filing date: 29. 01.
3
Brendel, R., Ernst, M.
Macroporous Si as an absorber for thin-film solar cells
(2010) Physica Status Solidi - Rapid Research Letters, 4 (1-2), pp. 40-42. Cited 22 times.
http://www3.interscience.wiley.com/cgi-bin/fulltext/123215552/PDFSTART
doi: 10.1002/pssr.200903372
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4
Ernst, M., Brendel, R., Ferré, R., Harder, N.-P.
Thin macroporous silicon heterojunction solar cells
(2012) Physica Status Solidi - Rapid Research Letters, 6 (5), pp. 187-189. Cited 16 times.
doi: 10.1002/pssr.201206113
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5
Ernst, M., Brendel, R.
Macroporous silicon solar cells with an epitaxial emitter
(2013) IEEE Journal of Photovoltaics, 3 (2), art. no. 6472253, pp. 723-729. Cited 7 times.
doi: 10.1109/JPHOTOV.2013.2247094
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6
Ernst, M., Schulte-Huxel, H., Niepelt, R., Kajari-Schröder, S., Brendel, R.
Thin crystalline macroporous silicon solar cells with ion implanted emitter (Open Access)
(2013) Energy Procedia, 38, pp. 910-918. Cited 2 times.
http://www.sciencedirect.com/science/journal/18766102
doi: 10.1016/j.egypro.2013.07.364
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7
Nenzi, P., Kholostov, K., Crescenzi, R., Bondarenka, H., Bondarenko, V., Balucani, M.
Electrochemically etched TSV for porous silicon interposer technologies
(2013) Proceedings - Electronic Components and Technology Conference, art. no. 6575887, pp. 2201-2207. Cited 2 times.
ISBN: 978-147990233-0
doi: 10.1109/ECTC.2013.6575887
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8
Perticaroli, S., Varlamava, V., Palma, F.
Microwave sensing of nanostructured semiconductor surfaces
(2014) Applied Physics Letters, 104 (1), art. no. 013110. Cited 3 times.
doi: 10.1063/1.4861424
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9
De Cesare, G., Caputo, D., Tucci, M.
Electrical properties of ITO/crystalline-silicon contact at different deposition temperatures
(2012) IEEE Electron Device Letters, 33 (3), art. no. 6142006, pp. 327-329. Cited 28 times.
doi: 10.1109/LED.2011.2180356
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We developed a new process for the fabrication of crystalline solar cell, based on an ultrathin silicon membrane, taking advantage of porous silicon technology. The suggested architecture allows the costs reduction of silicon based solar cell reusing the same wafer to produce a great number of membranes. The architectures combines the efficiency of crystalline silicon solar cell, with the great absorption of porous silicon, and with a more efficient way to use the material. The new process faces the main challenge to achieve an effective and not expensive passivation of the porous silicon surface, in order to achieve an efficient photovoltaic device. At the same time the process suggests a smart way to selective doping of the macroporous silicon layers despite the through-going pores
Outpatient management of febrile neutropenia in children with cancer
Optimizing the therapeutic strategies based on the results of randomized studies comparing different regimens led to a better prognosis of nearly all pediatric malignancies during the past four decades. Fever and neutropenia (FN) is a common complication in patients undergoing chemotherapy to treat cancer. There is no consensus on when standard therapy can be safely reduced; this lack of consensus leads to important variations in management of FN between different institutions, usually conducted according to local attitudes. To address this issue, the Infection working group of the Italian association for pediatric hematology oncology (AIEOP) organized a consensus meeting. This paper reports the agreement derived from this meeting
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Warehouse management is a discipline that has gained importance in recent decades. In the era of the Digital Revolution and Industry 5.0, to enable a company to attain a competitive advantage, it is necessary to identify smart improvement tools that help search for warehouse problems and solutions. A good tool to highlight issues related to layout and resource flows is the spaghetti chart which, besides being used to minimize waste according to lean philosophy, can also be used to assess warehouse safety and reliability and improve the plant sustainability. This article shows how to exploit “smart spaghetti” (spaghetti chart automatically generated by smart tracking devices) to conceive improvements in the layout and work organization of a warehouse, reducing the risk of collision between forklifts and improving the operators’ safety. The methodology involves automatically mapping the spaghetti charts (searching for critical areas where the risk of collision is high) and identifying interventions to be carried out to avoid near misses. “Smart spaghetti” constitutes a valuable decision support tool to identify potential improvements in the system through changes in the layout or in the way activities are performed. This work shows an application of the proposed technique in a pharmaceutical warehouse
OEE Evaluation of a Paced Assembly Line Through Different Calculation and Simulation Methods: A Case Study in the Pharmaceutical Environment
Modern production systems must guarantee high performance. Increasingly challenging international competition, budget reductions for the health sector and constant technological evolution are just three of the many aspects that drive pharmaceutical companies to continuously improve the productivity of their lines. The scientific literature has for many years been proposing calculation models for estimating the productivity of a machine. One of the most famous, and still used, is overall equipment effectiveness (OEE). This allows the calculation the valuable output considering the six ‘big losses’. The limitations of this approach are noticeable when considering a production line instead of a single machine. Numerous researchers have proposed alternative methods or changes in OEE, to be able to cover the widest spectrum of possible cases. In this study, we wanted to evaluate how such theoretical models related to OEE are actually able to represent the world of tight production flows or whether, in these cases, a more complex type of simulation should be preferred. To do this, we carried out a case study of a production line in the pharmaceutical industry, and the results showed that the simulation approach gives better results because of the peculiarities not considered by the theoretical models
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Laser Treatment to form An Effective Base Contact in a - Si:H/c-Si Heterojunction Solar Cells☆
Abstract In this paper we investigate the p-type a-Si:H/ia-Si:H/p-type c-Si structure, commonly used as base contact in amorphous/crystalline silicon heterojunction solar cell when fabricated on p-type c-Si wafer. Even though the most effective amorphous silicon/crystalline silicon heterostructure is based on n-type c-Si due to higher bulk lifetime, the p-type c-Si still remains the most common and cheaper substrate for silicon based solar cell. In particular we study the effect of localized 532 nm pulsed laser treatment at different laser conditions in order to reduce the cell series resistance due to the base contact. In this approach the p-type a-Si:H layer is used as a source of boron dopant. Depending on the thickness of the p-type a-Si:H film, when the laser beam is focused on p-type a-Si:H layer the boron can be transferred into the c-Si base to form an overdoped region and then an effective local Back Surface Field, able to enhance the hole collection at the metal of the base electrode in the p-type c-Si based heterojunction solar cell. The application of a thin Aluminum layer on top of the amorphous silicon to be treated by laser is also concerned. Series resistance of a transverse structure composed by the laser treated p-type a-Si:H/c-Si/opposite surface contacted by InGa is considered to optimize the laser procedure. Values as low as 0.5 Ωcm 2 are obtained when the aluminum layer is adopted
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Cost reduction and product quality are key factors in the present competitive market. Product reliability is strongly correlated with customer satisfaction. Accelerated life tests (ALTs) represent a methodology able to investigate product reliability performance in a short time with respect to the classical testing methods in the design. The aim of this paper is the proposal and development of an integrated procedure based on ALTs in order to evaluate the reliability performance of a new product; the use of such testing methods is useful to systematically support the design and qualification phases and to help the service demand forecasting before the product launch. The smart choice of the acceleration parameter and the knowledge developed during the upstream phase in the product lifecycle can be useful and cost effective for its utilization in the downstream lifecycle, as an acceptable substitute of specific advanced final inspection methodologies. The methodology has been tested during the development ..
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