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about light trapping and rough surface

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发表于 2009-7-15 18:07:31 | 显示全部楼层 |阅读模式
1. Name: CAMPBELL, Patrick, Dr.
2. Qualifications
PhD (1989), B.E. (1974), B.Sc. (1974)
3. Current appointment
Research Fellow, Thin Film and Third Generation Groups,
Centre for Photovoltaics, UNSW (2002 – present).
4. Relevant Employment History:
ARC Research Fellow, Photovoltaics Special Research Centre, UNSW (1996 – 2002).
Research Fellow, Photovoltaics SRC (1993 – 1995)
ARC Postdoctoral Research Fellow, Photovoltaics SRC (1989 – 1992).
5. Publications:
5.1 Six most significant publications over last 5 years (most recent first)
(a) P. Campbell, “Enhancement of absorption in silicon films using a pressed glass substrate texture”,
Glass Technology June 2002.
(Introduces a new surface texturing process for thin film solar cells using author-developed
equipment. A new method of assessing light trapping is presented.)
(b) M. Kerr, P. Campbell and A. Cuevas, “Limiting Efficiency of Crystalline Silicon Solar Cells due
to Coulomb-Enhanced Auger Recombination”, to be published in Progress in Photovoltaics.
(Refines effects of doping and injection and introduces effect of photon recycling.)
(c) P. Campbell and M. Keevers, “Characterisation of Light Trapping in Silicon Films by Spectral
Photoconductance Measurements”, Solar Energy Materials and Solar Cells 66, pp187-193
(2001).
(Examines how an electronic approach overcomes fundamental limitation of standard optical
method for characterising light trapping.)
(d) P.Campbell and M.A.Green, “High Performance light trapping textures for monocrystalline
silicon solar cells”, Solar Energy Materials and Solar Cells 65, pp. 369-375 (2001).
(Two new surface textures are presented which, while based on crystallographic etching,
overcome prime shortcomings of presently fabricated pyramid textures.)
(e) P.Campbell and M.Keevers, “Light Trapping and Reflection Control for Silicon Thin Films
Deposited on Glass Substrates Textured by Embossing”, Conference Record, 28th IEEE
Photovoltaic Specialist Conference, p. 355-8, Alaska (2000).
(Introduces new texturing process and assesses validity of using photoconductance for
characterising light trapping.)
(f) J.Zhao, P.Campbell and M.A.Green, “19.8% Efficient Honeycomb Multicrystalline Silicon Solar
Cell with Improved Light Trapping”, IEEE Transactions on Electron Devices, Vol.46, No.10,
1978-1983 (special edition on Photovoltaics, 1999).
(Examines record efficiency solar cell using unique surface texture of inverted cusps.)
5.2 Four additional career best publications (most recent first)
(g) D. Thorp, P. Campbell and S.R.Wenham, “Conformal films for light trapping in thin silicon solar
cells”, Progress in Photovoltaics:Research and Applications Vol.4, p205-224 (1996).
(Shows how ratio of film thickness and texture period critically affect light trapping.)
71
(h) P.Campbell, S.R.Wenham and M.A.Green, "Light trapping and reflection control in solar cells
using tilted crystallographic surface textures", Solar Energy Materials and Solar Cells 31, 133-
153 (1993).
(Shows how asymmetry of crystallographic texturing benefits cell performance.)
(i) P. Campbell and M.A.Green, "Light trapping properties of pyramidally textured surfaces",
J.Applied Physics 62(1), p243-249 (1987).
(First paper to rigorously examine how and how well light scatter produced by common surface
textures enhance absorption. Continues to be widely cited.)
(j) P.Campbell and M.A.Green, "The limiting efficiency of silicon solar cells under concentrated
sunlight", IEEE Transactions on Electron Devices ED-33, p. 234-239 (1986).
(Combines effect on efficiency of Auger-limited voltage and increased light intensity. This paper
set a new efficiency benchmark.)
Expertise
• Designing and commissioning a press/ furnace for embossing a micro-texture on glass onto which
thin silicon films, which are then processed into solar cells, are deposited. This is the first
realisation of a glass micro-texture identified by optical modelling for its high absorption
enhancing potential. This project also involves development of sputtering coatings for releasing
pressed glass from the texturing die at 700oC.
• Developing novel methods for optically characterising absorption in a silicon thin film solar cell,
particularly to test performance enhancement due to embossed textures. Experience in depositing
hydrogenated amorphous silicon films by plasma enhanced chemical vapour deposition.
• Optical modeling of light scatter from textured silicon films with novel diffuse reflectors, also
developing a method to characterise these reflectors .
• Optical modeling of high performance textures for wafer solar cells and modules.
• Combined optical and electronic modeling of multilayer solar cells. Collaboration with Pacific
Solar on light trapping principles and fabrication on glass.
• Developing a plasma texturing method for forming non-crystallographic textures on tools for
embossing glass.
• Optical modelling of photon recycling, to study a dome/surface texture system for efficiently
extracting light generated in a thin semiconducting film.
• Development of a texturing process suitable for the unattached surface of a mesa etched, domemounted GaAs double heterostructure.

http://www.pv.unsw.edu.au/Staff/patrickcampbell.asp
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