Mismatched front and back gratings for optimum light trapping in ultra-thin crystalline silicon solar cells

OPTICS COMMUNICATIONS

卷:377

Article

Hsu, Wei-Chun¹  Tong, Jonathan K.¹  Branham, Matthew S.¹  Huang, Yi¹  Yerci, Selcuk^1,2,3  Boriskina, Svetlana V.¹  Chen, Gang¹ 

[1] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

[2] Middle E Tech Univ, Elect & Elect Engn, Micro & Nanotechnol Programme, TR-06800 Ankara, Turkey

[3] Middle E Tech Univ, Ctr Solar Energy Res & Applicat, TR-06800 Ankara, Turkey

关键词: Light trapping;    Double grating;    Crystalline silicon;    Solar cell;    Thin absorber;   

DOI  :  10.1016/j.optcom.2016.04.055

来源: Elsevier

【 摘 要 】

The implementation of a front and back grating in ultra-thin photovoltaic cells is a promising approach towards improving light trapping. A simple design rule was developed using the least common multiple (LCM) of the front and back grating periods. From this design rule, several optimal period combinations can be found, providing greater design flexibility for absorbers of indirect band gap materials. Using numerical simulations, the photo-generated current (J(ph)) for a 10-pm-thick crystalline silicon absorber was predicted to be as high as 38 mA/cm(2), which is 11.74% higher than that of a single front grating (J(ph) =34 mA/cm(2)). (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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