RT Journal Article
T1 Boosting ultrathin aSi-H solar cells absorption through a nanoparticle cross-packed metasurface
A1 Elshorbagy, Mahmoud Hamdy Mohamed
A1 López Fraguas, Eduardo
A1 Sánchez Pena, José Manuel
A1 García Cámara, Braulio
A1 Vergaz Benito, Ricardo
AB Hydrogenated amorphous silicon (a-Si:H) solar cells have some performance limitations related to the mobility and lifetime of their carriers. For this reason, it is interesting to explore thin-film solutions, achieving a tradeoff between photons optical absorption and the electrical path of the carriers to get the optimum thickness. In this work, we propose the insertion of a metasurface based on a cross-patterned ITO contact film, where the crosses are filled with nanospheres. We numerically demonstrate that this configuration improves the photogenerated current up to a 40% by means of the resonant effects produced by the metasurface, being independent on the impinging light polarization. Light handling mechanisms guide light into the active and auxiliary layers, increasing the effective absorption and mitigating the Staebler-Wronski effect. The selection of optimum materials and parameters results in nanospheres of ZnO with a 220 nm radius.
PB Elsevier
SN 0038-092X
YR 2020
FD 2020-05-15
LK https://hdl.handle.net/10016/33814
UL https://hdl.handle.net/10016/33814
LA eng
NO This work was supported by the Ministerio de Economía y Competitividad of Spain (TEC2016-77242-C3-1-R Grant, AEI/FEDER, European Union funds). López-Fraguas thanks funding support from Ministerio de Educación y Formación Profesional of Spain for his doctoral grant (FPU research fellowship Ref. FPU17/00612). The authors acknowledge Prof. Joshua M. Pearce for providing them with experimental n and k values of the optical constants of the aSi-H.
DS e-Archivo
RD 27 jul. 2024