title: P3HT-based nanoarchitectural Fano solar cells.
abstract: The finite difference time domain simulation shows the existence of an asymmetric quadrupole of Fano resonance on the surface of a gold-silica core-shell (Au@silica) nanoparticle (NP) as being incorporated into the metal oxide nanoarchitecture/P3HT hybrid. Compared to the metal oxide nanoarchitecture/P3HT hybrid solar cell, a 30% enrichment of the short-circuit current density (Jsc) is attained in the P3HT-based nanoarchitectural Fano solar cell with the Au@silica NPs. The enhancement of charge separation in the cell by the electric field of the Fano resonance is directly evidenced by time-resolved photoluminescence measurements. The increase of the degree of P3HT order in the hybrid by the incorporation of Au@silica NPs into the hybrid active layer may also contribute to the enhancement in the Jsc. Charge carrier dynamic measurements show that an electron collection efficiency of ∼97% can be maintained in the P3HT-based nanoarchitectural Fano solar cell. Significant improvement of the efficiency of the inverted metal oxide/P3HT hybrid solar cell is therefore achieved.
authors.affiliation: Department of Chemical Engineering, National Cheng Kung University , Tainan 701, Taiwan.
authors.forename: Wen-Pin
authors.initials: WP
authors.lastname: Liao
authors.forename: Yen-Hsun
authors.initials: YH
authors.lastname: Su
authors.forename: Yun-Kai
authors.initials: YK
authors.lastname: Huang
authors.forename: Chen-Sheng
authors.initials: CS
authors.lastname: Yeh
authors.forename: Li-Wen
authors.initials: LW
authors.lastname: Huang
authors.forename: Jih-Jen
authors.initials: JJ
authors.lastname: Wu
keywords: Fano resonance; charge dynamics; gold−silica sore-shell nanoparticle; hybrid polymer solar cell; metal oxide nanoarchitecture