A photonic-plasmonic structure for enhancing light absorption in thin film solar cells

被引：96

作者：

Bhattacharya, Joydeep ^{[1
,2
]}

Chakravarty, Nayan ^{[1
,2
]}

Pattnaik, Sambit ^{[1
,2
]}

Slafer, W. Dennis ^{[3
]}

Biswas, Rana ^{[1
,2
,4
,5
]}

Dalal, Vikram L. ^{[1
,2
]}

机构：

[1] Iowa State Univ, Microelect Res Ctr, Ames, IA 50011 USA

[2] Iowa State Univ, Dept Elect & Comp Engn, Ames, IA 50011 USA

[3] Lightwave Power, Cambridge, MA 02138 USA

[4] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[5] Iowa State Univ, Ames Lab, Ames, IA 50011 USA

来源：

APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 13期

关键词：

light absorption; phonon-plasmon interactions; photoconductivity; reflectivity; silicon; silver; solar cells; zinc compounds; MICROCRYSTALLINE SILICON; OPTICAL-ABSORPTION; ENHANCEMENT; NANOWIRE;

D O I：

10.1063/1.3641469

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We describe a photonic-plasmonic nanostructure, for significantly enhancing the absorption of long-wavelength photons in thin-film silicon solar cells, with the promise of exceeding the classical 4n(2) limit for enhancement. We compare identical solar cells deposited on the photonic-plasmonic structure, randomly textured back reflectors and silver-coated flat reflectors. The state-of-the-art back reflectors, using annealed Ag or etched ZnO, had high diffuse and total reflectance. For nano-crystalline Si absorbers with comparable thickness, the highest absorption and photo-current of 21.5 mA/cm(2) was obtained for photonic-plasmonic back-reflectors. The periodic photonic plasmonic structures scatter and reradiate light more effectively than a randomly roughened surface. (C) 2011 American Institute of Physics. [doi:10.1063/1.3641469]

引用

页数：3

共 34 条

[1] Plasmonics for improved photovoltaic devices (vol 9, pg 205, 2010) [J].