The incorporation of plasmonic nanoparticles (NPs) into photovoltaic devices can increase light absorption and in turn improve solar cell performance. The graphene oxide-encapsulated gold NPs (Au@GO NPs) are designed and incorporated into photoanodes to demonstrate plasmonic dye-sensitized solar cells. The coupling between GO and the Au NPs has the beneficial effect of extending solar spectral utilization in the long-wavelength portion of the visible spectrum. In addition, GO encapsulation reduces charge recombination on the surface of the NPs and facilitates improved charge transport. As a result, champion devices with plasmonic photoanodes containing Au@GO NPs deliver a power conversion efficiency that reaches 9.1%. This corresponds to an enhancement in photocurrent and power conversion efficiency of 19 and 17%, respectively, compared to control devices.
Bibliographical noteFunding Information:
This study was supported by the National Research Foundation of Korea Grant funded by the Korean Government (2014R1A2A1A09005656, 2015M1A2A2058365, 2011-0030255). T.S. and D.K. acknowledge support by the National Research Foundation (NRF) grants funded by the Korean Government (2015R1A2A1A10052826). O. Ouellette was financially supported by NSERC's CREATE Program in Materials for Enhanced Energy Technologies.
© 2016 American Chemical Society.