Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 121, Issue -, Pages 80-84Publisher
ELSEVIER
DOI: 10.1016/j.solmat.2013.10.017
Keywords
Polymer solar cells; Gold nanoparticles; Hole transit; Impedance spectroscopy
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The electrical properties of polymer solar cells (PSCs) with gold nanoparticles (AuNPs) embedded in the hole transport layers (Hits) were investigated. The PSCs with AuNP-embedded HTLs exhibited 8%, 9.5%, and 22% enhancement in short-circuit current density, open-circuit voltage, and power conversion efficiency, respectively. The low contact resistance at the active layer/Hit interface resulted in the high collection efficiency and low electron-hole recombination. The downshift of the Fermi energy in AuNP-embedded HTLs lowered the energy barrier and thinned the depletion layer at the active layer/HTL interface, accounting for the enhanced collection efficiency. (C) 2013 Elsevier B.V. All rights reserved.
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