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Nanomaterials 2016, 6(6), 98; doi:10.3390/nano6060098

Enhancing the Photocurrent of Top-Cell by Ellipsoidal Silver Nanoparticles: Towards Current-Matched GaInP/GaInAs/Ge Triple-Junction Solar Cells

1
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
2
Institute of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
3
Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083, China
*
Authors to whom correspondence should be addressed.
Academic Editors: Guanying Chen, Zhijun Ning and Hans Agren
Received: 6 April 2016 / Revised: 11 May 2016 / Accepted: 16 May 2016 / Published: 25 May 2016
(This article belongs to the Special Issue Nanostructured Solar Cells)
View Full-Text   |   Download PDF [2535 KB, uploaded 25 May 2016]   |  

Abstract

A way to increase the photocurrent of top-cell is crucial for current-matched and highly-efficient GaInP/GaInAs/Ge triple-junction solar cells. Herein, we demonstrate that ellipsoidal silver nanoparticles (Ag NPs) with better extinction performance and lower fabrication temperature can enhance the light harvest of GaInP/GaInAs/Ge solar cells compared with that of spherical Ag NPs. In this method, appropriate thermal treatment parameters for Ag NPs without inducing the dopant diffusion of the tunnel-junction plays a decisive role. Our experimental and theoretical results confirm the ellipsoidal Ag NPs annealed at 350 °C show a better extinction performance than the spherical Ag NPs annealed at 400 °C. The photovoltaic conversion efficiency of the device with ellipsoidal Ag NPs reaches 31.02%, with a nearly 5% relative improvement in comparison with the device without Ag NPs (29.54%). This function of plasmonic NPs has the potential to solve the conflict of sufficient light absorption and efficient carrier collection in GaInP top-cell devices. View Full-Text
Keywords: GaInP/GaInAs/Ge triple-junction solar cells; Ag ellipsoidal nanoparticles; thermal treatment parameters; current-match GaInP/GaInAs/Ge triple-junction solar cells; Ag ellipsoidal nanoparticles; thermal treatment parameters; current-match
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Bai, Y.; Yan, L.; Wang, J.; Su, L.; Yin, Z.; Chen, N.; Liu, Y. Enhancing the Photocurrent of Top-Cell by Ellipsoidal Silver Nanoparticles: Towards Current-Matched GaInP/GaInAs/Ge Triple-Junction Solar Cells. Nanomaterials 2016, 6, 98.

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