Share Email Print

Proceedings Paper

Holographic spectral beamsplitting for increased organic photovoltaic conversion efficiency
Author(s): Shelby D. Vorndran; Silvana Ayala; Yuechen Wu; Juan M. Russo; Raymond K. Kostuk; Jacob T. Friedlein; Sean E. Shaheen; Christine K. Luscombe
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Thermodynamic principles limit the conversion efficiency of a single bandgap organic photovoltaic (OPV) cell to 33%1 . In order to increase efficiency, multiple OPV devices can be combined to cover a larger spectral range of the incident solar spectrum. The most common way of doing this is to mount multiple bandgap cells in tandem or series. However, stacked multijunction systems have limitations, such as current-matching constraints and optical quality of the OPV layer. A separated arrangement with spectrum splitting is a promising alternative to the stacked tandem approach. In this paper, two organic photovoltaic cells with complementary EQE curves are integrated into a holographic spectrum splitting module. The highest possible conversion efficiency of this two-cell combination is quantified assuming an ideal spectral filter as a reference. A spectrum splitting module is built, consisting of a reflective hologram oriented at an angle to split the incident beam into two spectral bands. The holographic beamsplitting system is assembled and studied under a solar simulator. Power output and conversion efficiency of the holographic spectrum splitting system is evaluated in terms of Improvement over Best Bandgap (IoBB) of the two-cell combination. The combined system has a measured improvement over its best single cell of 12.30% under a solar simulator lamp and a predicted improvement of 16.39% under sunlight.

Paper Details

Date Published: 6 October 2014
PDF: 7 pages
Proc. SPIE 9184, Organic Photovoltaics XV, 918423 (6 October 2014); doi: 10.1117/12.2061773
Show Author Affiliations
Shelby D. Vorndran, College of Optical Sciences, The Univ. of Arizona (United States)
Silvana Ayala, The Univ. of Arizona (United States)
Yuechen Wu, The Univ. of Arizona (United States)
Juan M. Russo, The Univ. of Arizona (United States)
Raymond K. Kostuk, College of Optical Sciences, The Univ. of Arizona (United States)
The Univ. of Arizona (United States)
Jacob T. Friedlein, Univ. of Colorado at Boulder (United States)
Sean E. Shaheen, Univ. of Colorado at Boulder (United States)
Christine K. Luscombe, Univ. of Washington (United States)

Published in SPIE Proceedings Vol. 9184:
Organic Photovoltaics XV
Zakya H. Kafafi; Paul A. Lane; Ifor D. W. Samuel, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?