Absorption enhancement in ultra-thin textured AlGaAs films

被引：12

作者：

Boroditsky, M

Ragan, R

Yablonovitch, E

机构：

[1] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA

[2] Univ Calif Los Angeles, Dept Phys, Los Angeles, CA 90024 USA

[3] CALTECH, Dept Elect Engn, Pasadena, CA 91125 USA

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 1999年 / 57卷 / 01期

关键词：

ultra-thin textured AlGaAs films; light randomization; photon gas model;

D O I：

10.1016/S0927-0248(98)00160-3

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

We have studied light randomization and the absorption enhancement in textured ultra-thin AlxGa1-xAs films, with a thickness corresponding to a few optical wavelengths. A correlation between the degree of light randomization and trapping, with the scale length of the texturization geometry was found. The observed absorption enhancement corresponds to 90% of the best possible theoretical value, or 90% light randomization. A modified photon gas model is proposed to calculate the light trapping and absorption at the band edge in the textured thin films. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：1 / 7

页数：7

共 9 条

[1] OPTICALLY ENHANCED AMORPHOUS-SILICON SOLAR-CELLS
DECKMAN, HW
WRONSKI, CR
WITZKE, H
YABLONOVITCH, E
[J]. APPLIED PHYSICS LETTERS, 1983, 42 (11) : 968 - 970
[2] NATURAL LITHOGRAPHY
DECKMAN, HW
DUNSMUIR, JH
[J]. APPLIED PHYSICS LETTERS, 1982, 41 (04) : 377 - 379
[3] Light trapping effect in silicon wafers with anodically etched surfaces
Krotkus, A
Pacebutas, V
Kavaliauskas, J
Subacius, I
Grigoras, K
[J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1997, 64 (04): : 357 - 360
[4] Lee X. Y., 1996, P 25 IEEE PVSC 1996, P53
[5] STEWART H, 1996, APPL PHYS LETT, V69, P2327
[6] RAYLEIGH HYPOTHESIS IN THE THEORY OF REFLECTION BY A GRATING
VANDENBERG, PM
FOKKEMA, JT
[J]. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA, 1979, 69 (01) : 27 - 31
[7] VORONOVICH AG, 1985, ZH EKSP TEOR FIZ, V62, P65
[8] EXTREME SELECTIVITY IN THE LIFT-OFF OF EPITAXIAL GAAS FILMS
YABLONOVITCH, E
GMITTER, T
HARBISON, JP
BHAT, R
[J]. APPLIED PHYSICS LETTERS, 1987, 51 (26) : 2222 - 2224
[9] STATISTICAL RAY OPTICS
YABLONOVITCH, E
[J]. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA, 1982, 72 (07) : 899 - 907

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