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Title: Textured micrometer scale templates as light managing fabrication platform for organic solar cells

A three-dimensional, microscale-textured, grating-shaped organic solar cell geometry. The solar cells are fabricated on gratings to give them a three-dimensional texture that provides enhanced light absorption. Introduction of microscale texturing has a positive effect on the overall power conversion efficiency of the devices. This grating-based solar cell having a grating of pre-determined pitch and height has shown improved power-conversion efficiency over a conventional flat solar cell. The improvement in efficiency is accomplished by homogeneous coverage of the grating with uniform thickness of the active layer, which is attributed to a sufficiently high pitch and low height of the underlying gratings. Also the microscale texturing leads to suppressed reflection of incident light due to the efficient coupling of the incident light into modes that are guided in the active layer.
Inventors:
; ; ; ;
Issue Date:
OSTI Identifier:
1273194
Assignee:
Iowa State University Research Foundation, Inc. (Ames, IA) AMES
Patent Number(s):
9,401,442
Application Number:
13/223,351
Contract Number:
AC02-07CH11358
Resource Relation:
Patent File Date: 2011 Sep 01
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE

Other works cited in this record:

Diffraction gratings and buried nano-electrodes—architectures for organic solar cells
journal, March 2004

Functional microprism substrate for organic solar cells
journal, July 2006

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