An efficient light trapping scheme based on textured conductive photonic crystal back reflector for performance improvement of amorphous silicon solar cells

An efficient light trapping scheme named as textured conductive photonic crystal (TCPC) has been proposed and then applied as a back-reflector (BR) in n-i-p hydrogenated amorphous silicon (a-Si:H) solar cell. This TCPC BR combined a flat one-dimensional photonic crystal and a randomly textured surfa...

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Bibliographic Details
Published in:Applied physics letters 2014-08, Vol.105 (7), p.73506
Main Authors: Chen, Peizhuan, Hou, Guofu, Fan, QiHua, Huang, Qian, Zhao, Jing, Zhang, Jianjun, Ni, Jian, Zhang, Xiaodan, Zhao, Ying
Format: Article
Language:English
Subjects:
Amorphous silicon
AMORPHOUS STATE
Applied physics
Circuits
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Conductivity
CRYSTALS
CURRENT DENSITY
EFFICIENCY
ELECTRIC POTENTIAL
ELECTRICAL FAULTS
FILL FACTORS
HYDROGENATION
LIGHT SCATTERING
Open circuit voltage
Organic chemistry
Photonic crystals
Photovoltaic cells
REFLECTIVITY
Short circuit currents
SILICON SOLAR CELLS
Solar cells
SURFACES
TEXTURE
TRAPPING
VISIBLE RADIATION
Zinc oxide
ZINC OXIDES
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Summary:An efficient light trapping scheme named as textured conductive photonic crystal (TCPC) has been proposed and then applied as a back-reflector (BR) in n-i-p hydrogenated amorphous silicon (a-Si:H) solar cell. This TCPC BR combined a flat one-dimensional photonic crystal and a randomly textured surface of chemically etched ZnO:Al. Total efficiency enhancement was obtained thanks to the sufficient conductivity, high reflectivity and strong light scattering of the TCPC BR. Unwanted intrinsic losses of surface plasmon modes are avoided. An initial efficiency of 9.66% for a-Si:H solar cell was obtained with short-circuit current density of 14.74 mA/cm2, fill factor of 70.3%, and open-circuit voltage of 0.932 V.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4893606