Open AccessDesign of deterministic light-trapping structures for thin silicon heterojunction solar cells
Author(s) -
Samia Ahmed Nadi,
Karsten Bittkau,
Florian Lentz,
Kaining Ding,
Uwe Rau
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.417848
Subject(s) - wafer , optics , materials science , photocurrent , optoelectronics , heterojunction , trapping , thin film , wavelength , silicon , crystalline silicon , absorptance , solar cell , physics , reflectivity , nanotechnology , ecology , biology
We optically designed and investigated two deterministic light-trapping concepts named "Hutong" (wafer thickness dependent, patch-like arrangement of "V" grooves with alternating orientations) and "VOSTBAT" (one directional "V" grooves at the front and saw-tooth like structures at the back) for the application in emerging thin silicon heterojunction (SHJ) solar cells. Calculated photocurrent density (J ph ) (by weighting the spectrally resolved absorptance with AM1.5g spectrum and integrating over the wavelength) showed that both the Hutong and VOSTBAT structures exceed the Lambertian reference and achieved J ph of 41.72 mA/cm 2 and 41.86 mA/cm 2 , respectively, on 60 µm thin wafers in the case of directional, normal incidence.