TY - GEN
T1 - Freeform surface relief diffractive optic for photovoltaic spectrum splitting
AU - Vorndran, Shelby D.
AU - Ayala, Silvana
AU - Wu, Yuechen
AU - Russo, Juan M.
AU - Zaverton, Melissa A.
AU - Milster, Tom
AU - Kostuk, Raymond K.
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/12/14
Y1 - 2015/12/14
N2 - A surface relief diffractive optical element (DOE) for photovoltaic (PV) spectrum splitting is fabricated and tested. The optic is designed using a modified Gerchberg-Saxton algorithm. The module consists of a DOE followed by a 3.3 cm focal length lens. Alternating side-by-side PV cells - Indium Gallium Phosphide and Silicon - are placed at the collection plane. The DOE is fabricated in photopolymer using grayscale lithography. Optical efficiency and spectral distribution are measured with a scanning spectrometer. Two-bandgap conversion efficiency of 25.4% is achieved using the fabricated DOE. Simulations show that 28.4% conversion efficiency is possible with this type of optical element, which approaches the maximum possible conversion efficiency of the two-cell combination used (32.4%).
AB - A surface relief diffractive optical element (DOE) for photovoltaic (PV) spectrum splitting is fabricated and tested. The optic is designed using a modified Gerchberg-Saxton algorithm. The module consists of a DOE followed by a 3.3 cm focal length lens. Alternating side-by-side PV cells - Indium Gallium Phosphide and Silicon - are placed at the collection plane. The DOE is fabricated in photopolymer using grayscale lithography. Optical efficiency and spectral distribution are measured with a scanning spectrometer. Two-bandgap conversion efficiency of 25.4% is achieved using the fabricated DOE. Simulations show that 28.4% conversion efficiency is possible with this type of optical element, which approaches the maximum possible conversion efficiency of the two-cell combination used (32.4%).
KW - Gerchberg-Saxton algorithm
KW - diffractive optical element
KW - grayscale lithography
KW - spectrum splitting
UR - http://www.scopus.com/inward/record.url?scp=84961566825&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84961566825&partnerID=8YFLogxK
U2 - 10.1109/PVSC.2015.7356158
DO - 10.1109/PVSC.2015.7356158
M3 - Conference contribution
AN - SCOPUS:84961566825
T3 - 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015
BT - 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 42nd IEEE Photovoltaic Specialist Conference, PVSC 2015
Y2 - 14 June 2015 through 19 June 2015
ER -