Double-layer anti-reflection coating containing a nanoporous anodic aluminum oxide layer for GaAs solar cells.
Multilayer anti-reflection (AR) coatings can be used to improve the efficiency of Gallium Arsenide (GaAs) solar cells. We propose an alternate method to obtain optical thin films with specified refractive indices, which is using a self-assembled nanoporous anodic aluminum oxide (AAO) template as an optical thin film whose effective refractive index can be tuned by pore-widening. Different kinds of double-layer AR coatings each containing an AAO layer were designed and investigated by finite difference time domain (FDTD) method. We demonstrate that a λ /4n - λ /4n AR coating consisting of a TiO(2) layer and an AAO layer whose effective refractive index is 1.32 realizes a 96.8% light absorption efficiency of the GaAs solar cell under AM1.5 solar spectrum (400 nm-860 nm). We also have concluded some design principles of the double-layer AR coating containing an AAO layer for GaAs solar cells.
Engineering Research Center for Semiconductor Integrated Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China.
Tianshu
T
Yang
Xiaodong
X
Wang
Wen
W
Liu
Yanpeng
Y
Shi
Fuhua
F
Yang
D000327:Adsorption; D000537:Aluminum Oxide / Q000737:chemistry*; D001152:Arsenicals / Q000737:chemistry* / Q000528:radiation effects*; D011211:Electric Power Supplies; D004566:Electrodes; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005708:Gallium / Q000737:chemistry* / Q000528:radiation effects*; D008027:Light; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D012993:Solar Energy
D001152:Arsenicals; C043055:gallium arsenide; D005708:Gallium; D000537:Aluminum Oxide