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Light‐absorption enhancement in thin‐film silicon solar cells with front grating and rear‐located nanoparticle grating
Author(s) -
Shi Yanpeng,
Wang Xiaodong,
Liu Wen,
Yang Tianshu,
Yang Fuhua
Publication year - 2015
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201431421
Subject(s) - grating , materials science , optics , blazed grating , optoelectronics , absorption (acoustics) , plasmonic solar cell , holographic grating , silicon , diffraction grating , monocrystalline silicon , physics , composite material
A new light‐trapping structure combining front grating and rear‐located metal nanoparticle grating for thin‐film crystalline silicon solar cells is theoretically investigated. Over a wide range of the solar spectrum, light absorption has been improved. By analyzing light‐absorption enhancement and the electric‐field intensity profiles, it is demonstrated that light‐absorption improvement lies in the superposition of the grating diffraction and the particle scattering effects. Furthermore, optimizations of front grating and rear metal NPs are performed, and an impressive short‐circuit current density within a 1 µm c‐Si layer is obtained.