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Author Gong, Jiawei ♦ Zhou, Zhengping ♦ Qiao, Qiquan ♦ Sumathy, K. ♦ Yang, Huojun
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ COMPARATIVE EVALUATIONS ♦ DIAGRAMS ♦ DYES ♦ EFFICIENCY ♦ ELECTRODES ♦ GRAPHENE ♦ HYDROTHERMAL SYNTHESIS ♦ ILLUMINANCE ♦ IMAGES ♦ IODINE COMPOUNDS ♦ LAYERS ♦ MORPHOLOGY ♦ NANOSTRUCTURES ♦ PLATINUM ♦ POROUS MATERIALS ♦ POTASSIUM HYDROXIDES ♦ ROUGHNESS ♦ SCANNING ELECTRON MICROSCOPY ♦ SOLAR CELLS ♦ SURFACE AREA
Abstract Activated graphene nanoplatelets (aGNPs) prepared by a hydrothermal method using KOH as activating agent were used as counter electrode for high efficiency dye-sensitized solar cells (DSSCs). After the KOH activation, the scanning electron microscopy image shows that aGNPs demonstrate a more curled, rough, and porous morphology which could contain both micro- and mesopores. The KOH activation changed the stacked layers of GNPs to a more crumpled and curved morphology. The microstructure of large pores significantly increased the electrode surface area and roughness, leading to the high electrocatalytic activity for triiodide reduction at the counter electrode. The DSSCs fabricated using aGNP as counter electrodes were tested under standard AM 1.5 illumination with an intensity of 91.5 mW/cm{sup 2}. The device achieved an overall power conversion efficiency of 7.7%, which is comparable to the conventional platinum counter electrode (8%). Therefore, the low cost and high performance aGNP based counter electrode is a promising alternative to conventional Pt counter electrode in DSSCs.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-04-07
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 119
Issue Number 13


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