Enhanced absorption of thin-film photovoltaic cells using an optical cavity

被引：22

作者：

Weinstein, Lee A. ^{[1
]}

Hsu, Wei-Chun ^{[1
]}

Yerci, Selcuk ^{[1
,2
]}

Boriskina, Svetlana V. ^{[1
]}

Chen, Gang ^{[1
]}

机构：

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

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

来源：

JOURNAL OF OPTICS | 2015年 / 17卷 / 05期

关键词：

photovoltaics; light trapping; ray tracing; SOLAR-CELLS; FUNDAMENTAL LIMIT; PERFORMANCE; EFFICIENCY; COST;

D O I：

10.1088/2040-8978/17/5/055901

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We show via numerical simulations that the absorption and solar energy conversion efficiency of a thin-film photovoltaic (PV) cell can be significantly enhanced by embedding it into an optical cavity. A reflective hemi-ellipsoid with an aperture for sunlight placed over a tilted PV cell reflects unabsorbed photons back to the cell, allowing for multiple opportunities for absorption. Ray tracing simulations predict that with the proposed cavity a textured thin-film silicon cell can exceed the Yablonovitch (Lambertian) limit for absorption across a broad wavelength range, while the performance of the cavity-embedded planar PV cell approaches that of the cell with the surface texturing.

引用

页数：7

共 31 条

[11] Toward the Lambertian Limit of Light Trapping in Thin Nanostructured Silicon Solar Cells [J].