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Comb-shaped photonic crystal structure for efficient broadband light diffraction and funnelling in solar cells
KTH, School of Biotechnology (BIO), Theoretical Chemistry and Biology.
KTH, School of Biotechnology (BIO), Theoretical Chemistry and Biology.
KTH, School of Biotechnology (BIO), Theoretical Chemistry and Biology.ORCID iD: 0000-0002-2442-1809
2012 (English)In: Solar Energy Materials and Solar Cells, ISSN 0927-0248, E-ISSN 1879-3398, Vol. 99, 316-320 p.Article in journal (Refereed) Published
Abstract [en]

We present a comb-shaped photonic-crystal (PhC) rods-lattice structure of broadband light diffraction and funnelling for solar cell applications. It is shown that the photonic band of this PhC structure is very dispersive over a broad bandwidth so that light will be efficiently diffracted in the wavelength region of solar radiation. The PhC structure also creates resonance modes leading to further diffraction and funnelling of light so that the light propagates in many pathways in the whole PhC lattice region, which will greatly facilitate light-matter interaction when light-absorbing elements are embedded in the PhC structure. The proposed structure is also valid for photodetection applications.

Place, publisher, year, edition, pages
2012. Vol. 99, 316-320 p.
Keyword [en]
Light diffraction and funnelling, Photovoltaic, Photonic crystal, Solar cell
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-92990DOI: 10.1016/j.solmat.2011.12.020ISI: 000301167200044Scopus ID: 2-s2.0-84862801322OAI: oai:DiVA.org:kth-92990DiVA: diva2:514926
Note
QC 20120411Available from: 2012-04-11 Created: 2012-04-10 Last updated: 2017-12-07Bibliographically approved
In thesis
1. Light manipulation in micro and nano photonic materials and structures
Open this publication in new window or tab >>Light manipulation in micro and nano photonic materials and structures
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Light manipulation is an important method to enhance the light-matter interactions in micro and nano photonic materials and structures by generating usefulelectric field components and increasing time and pathways of light propagationthrough the micro and nano materials and structures. For example, quantum wellinfrared photodetector (QWIP) cannot absorb normal incident radiation so thatthe generation of an electric field component which is parallel to the original incident direction is a necessity for the function of QWIP. Furthermore, the increaseof time and pathways of light propagation in the light-absorbing quantum wellregion will increase the chance of absorbing the photons.The thesis presents the theoretical studies of light manipulation and light-matter interaction in micro and nano photonic materials and structures, aiming atimproving the performance of optical communication devices, photonic integrateddevices and photovoltaic devices.To design efficient micro and nano photonic devices, it is essential to knowthe time evolution of the electromagnetic (EM) field. Two-dimensional and three-dimensional finite-difference time-domain (FDTD) methods have been adopted inthe thesis to numerically solve the Maxwell equations in micro and nano photonicmaterials and structures.Light manipulation in micro and nano material and structures studied in thisthesis includes: (1) light transport in the photonic crystal (PhC) waveguide, (2)light diffraction by the micro-scale dielectric PhC and metallic PhC structures(gratings); and (3) exciton-polaritons of semiconductor quantum dots, (4) surfaceplasmon polaritons at semiconductor-metallic material interface for subwavelengthlight control. All these aspects are found to be useful in optical devices of multiplebeam splitter, quantum well/dot infrared photodetectors, and solar cells.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. 72 p.
Series
Trita-BIO-Report, ISSN 1654-2312 ; 2012:13
Keyword
Photonic crystal, quantum dot, light-matter interaction
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-94081 (URN)978-91-7501-353-4 (ISBN)
Public defence
2012-06-01, FD51, AlbaNova Universitetscentrum, Roslagstullsbacken 21, Stockholm, 10:00 (English)
Opponent
Supervisors
Note
QC 20120507Available from: 2012-05-07 Created: 2012-05-07 Last updated: 2012-05-07Bibliographically approved

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Fu, Ying

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