Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Christian Fisker"'
Publikováno v:
Pedersen, T G, Fisker, C & Jensen, R V S 2010, ' Tight-binding parameterization of alpha-Sn quasiparticle band structure ', Journal of Physics and Chemistry of Solids, vol. 71, no. 1, pp. 18 . https://doi.org/10.1016/j.jpcs.2009.10.002
The diamond structure of tin (α-Sn) can be stabilized in nanocrystals embedded in a suitable host. We developed highly accurate parameterizations for tight-binding simulation of such structures incorporating strain and spin–orbit interaction. Para
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e1d99b8dbe96337d5a526d1730b17da
https://doi.org/10.1016/j.jpcs.2009.10.002
https://doi.org/10.1016/j.jpcs.2009.10.002
Autor:
Thomas Garm Pedersen, Christian Fisker
Publikováno v:
physica status solidi (b). 246:354-360
A self-consistent charge density-functional based tight-binding (SCC-DFTB) parametrisation for structural optimization and electronic properties of zinc oxide is presented. Repulsive potentials are obtained from the ZnO wurtzite geometry and a thin n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91c7bd7ad3a7a319a94a1167f557f612
https://doi.org/10.1002/pssb.200844370
https://doi.org/10.1002/pssb.200844370
Publikováno v:
Yao-Chung, E T, Fisker, C & Pedersen, T G 2014, ' Optical absorption of amorphous silicon on anodized aluminum substrates for solar cell applications ', Optics Communications, vol. 315, pp. 17-25 . https://doi.org/10.1016/j.optcom.2013.10.090
The development of backside reflectors (BSRs) is crucial for the efficiency of future low cost thin-film silicon (Si) solar cells. In this work, nanostructured aluminum substrates intended as back reflectors are produced by anodization, and hydrogena
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4a00abd0b51dc351ff2ebb6ca0ae4f0
https://vbn.aau.dk/da/publications/29c97fe9-9b24-4b59-b37b-0823e9bb4323
https://vbn.aau.dk/da/publications/29c97fe9-9b24-4b59-b37b-0823e9bb4323
Publikováno v:
Fisker, C, Trolle, M L & Pedersen, T G 2012, ' Modelling amorphous silicon with hydrogenated defects: GW treatment of the ST12 phase ', Journal of Physics: Condensed Matter, vol. 24, no. 32, pp. 325803 . < http://www.scopus.com/inward/record.url?eid=2-s2.0-84864251216&partnerID=40&md5=43328f02461fee14d042b193b41c498f >
The ST12 phase of silicon is investigated as a possible model for amorphous silicon (a-Si). The structure is studied both with and without hydrogenated hole defects to model the properties of hydrogenated amorphous silicon (a-Si:H) as well as a-Si. A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::007fc6689e86fe62dfc83f9fc32543ef
https://vbn.aau.dk/da/publications/4ea9c25f-5322-4f5a-aa03-5e3da5c99d76
https://vbn.aau.dk/da/publications/4ea9c25f-5322-4f5a-aa03-5e3da5c99d76
Publikováno v:
Vannini, P, Budd, L, Jensen, O B, Fisker, C & Jirón, P 2012, Technologies of Mobility in the Americas: Introduction . in P Vannini, L Budd, O B Jensen, C Fisker & P Jirón (eds), Technologies of Mobility in the Americas . Peter Lang, New York, Intersections in Communications and Culture, vol. 29, pp. 1-20 .
Aalborg University
Aalborg University
Technics, technicians, and techniques form the three basic cornerstones of what this book is about. Whether it is cell phones or airplanes, passengers or magazine advertisements, what the chapters collected here have in common is a basic orientation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::a6e25908212004f51d0eee0200ddc218
https://vbn.aau.dk/da/publications/0d426d38-8ba7-4c6a-8339-01a4174e0029
https://vbn.aau.dk/da/publications/0d426d38-8ba7-4c6a-8339-01a4174e0029
Autor:
Thomas Garm Pedersen, Christian Fisker
Publikováno v:
Fisker, C & Pedersen, T G 2008, ' Quantized electron states in nearly depleted hexagonal nanowires ', Nanotechnology, vol. 19, no. 11, pp. 115704 . https://doi.org/10.1088/0957-4484/19/11/115704
The hexagonal quantum well (QW) is studied as a model for hexagonal nanowires, and the effects of donor impurities and geometrical deformations of the well are treated. By use of the Poisson equation the donor potential is calculated and the eigenspe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e562294b6bf9ed46d0be7d78b4add38f
https://pubmed.ncbi.nlm.nih.gov/21730564
https://pubmed.ncbi.nlm.nih.gov/21730564
Publikováno v:
Pedersen, K, Fisker, C & Pedersen, T G 2008, ' Second-harmonic generation from ZnO nanowires ', Physica Status Solidi. C, Current topics in solid state physics, vol. 5, no. 8, pp. 2671-2674 . https://doi.org/10.1002/pssc.200779122
Optical second-harmonic generation (SHG) from ZnO nanowires is investigated in the region around the band gap. Strong multiphoton excited luminescence and SHG appearing together in the spectra from wires are separated and the SHG part is compared to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b36a57b49d230c34e40acf94569bdc80
https://vbn.aau.dk/da/publications/0c0f6e40-e2ec-11dd-b0a4-000ea68e967b
https://vbn.aau.dk/da/publications/0c0f6e40-e2ec-11dd-b0a4-000ea68e967b
Publikováno v:
Zarifi, A, Fisker, C & Pedersen, T G 2007, ' Theoretical study of quadratic electro-optic effect in semiconducting zigzag carbon nanotubes ', Physical Review B. Condensed Matter and Materials Physics, vol. 76, no. 4, pp. art.no. 045403 . < http://scitation.aip.org/dbt/dbt.jsp?KEY=PRBMDO&Volume=76 >
Using the perturbation treatment developed by Aspnes and Rowe [Phys. Rev. B 5, 4022 (1972)], an analytic expression for the third-order nonlinear optical susceptibility ${\ensuremath{\chi}}^{(3)}(\ensuremath{\omega};0,0,\ensuremath{\omega})$ is compu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cca9aadbcebf629c83d8462002bd82ff
https://vbn.aau.dk/da/publications/114c70c0-b547-11dc-a96e-000ea68e967b
https://vbn.aau.dk/da/publications/114c70c0-b547-11dc-a96e-000ea68e967b
Publikováno v:
Yao-Chung, E T, Fisker, C & Pedersen, T G 2014, ' Nanoimprinted backside reflectors for a-Si:H thin-film solar cells : Critical role of absorber front textures ', Optics Express, vol. 22, no. S3, pp. A651-A662 . https://doi.org/10.1364/OE.22.00A651
The development of optimal backside reflectors (BSRs) is crucial for future low cost and high efficiency silicon (Si) thin-film solar cells. In this work, nanostructured polymer substrates with aluminum coatings intended as BSRs were produced by posi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6875dd4318201364fd422036c84cdfd9
https://doi.org/10.1364/oe.22.00a651
https://doi.org/10.1364/oe.22.00a651
Autor:
Christian Fisker, Thomas Garm Pedersen
Publikováno v:
Fisker, C & Pedersen, T G 2013, ' Optimization of imprintable nanostructured a-Si solar cells: FDTD study ', Optics Express, bind 21, nr. S2, s. A208-A220 . https://doi.org/10.1364/OE.21.00A208
We present a finite-difference time-domain (FDTD) study of an amorphous silicon (a-Si) thin film solar cell, with nano scale patterns on the substrate surface. The patterns, based on the geometry of anisotropically etched silicon gratings, are optimi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bded44a8252106e8b7e789434be0d2b7
https://doi.org/10.1364/oe.21.00a208
https://doi.org/10.1364/oe.21.00a208