2017
DOI: 10.1063/1.4995803
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Improved efficiency of organic solar cells using Au NPs incorporated into PEDOT:PSS buffer layer

Abstract: Au based plasmonic phenomenon inside the hole transport layer poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) of an organic solar cell based on blend of poly(3-hexylthiophene) (P3HT) and [6:6]-phenyl-C61-butyric acid (PCBM) is investigated. The concentration of the Au nanoparticles synthesized by wet chemical reduction is one of the key factors to strong light trapping when the spherical gold nanoparticles are blended into the PEDOT:PSS solution. Studies of the influence of the concentratio… Show more

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Cited by 38 publications
(18 citation statements)
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“…Although the root mean square (RMS) of surface roughness of PEDOT:PSS deposited on the ITO layer without NPs is 1.1 nm, the RMS increased to 8.1, 10.3, 9.1, 10.7, and 11.6 nm after embedding the PEDOT:PSS with Au@Ag NPs at volume ratios of 8%, 10%, 12%, 14%, and 16% respectively. The increase in the embossed RMS roughness is possibly due to the changes in the size of Au@Ag NPs; the higher volume ratio of Au@Ag NPs embedded in PEDOT:PSS, and higher amount of sharp spikes that penetrates the PEDOT:PSS film [ 27 , 29 , 41 , 42 ]. The spikes of Au@Ag NPs could pierce the active layer, leading to higher amounts of generated excitons and the development of SPR at the interface between PC 71 BM and PTB7, which enhances the dissociation of excitons.…”
Section: Resultsmentioning
confidence: 99%
“…Although the root mean square (RMS) of surface roughness of PEDOT:PSS deposited on the ITO layer without NPs is 1.1 nm, the RMS increased to 8.1, 10.3, 9.1, 10.7, and 11.6 nm after embedding the PEDOT:PSS with Au@Ag NPs at volume ratios of 8%, 10%, 12%, 14%, and 16% respectively. The increase in the embossed RMS roughness is possibly due to the changes in the size of Au@Ag NPs; the higher volume ratio of Au@Ag NPs embedded in PEDOT:PSS, and higher amount of sharp spikes that penetrates the PEDOT:PSS film [ 27 , 29 , 41 , 42 ]. The spikes of Au@Ag NPs could pierce the active layer, leading to higher amounts of generated excitons and the development of SPR at the interface between PC 71 BM and PTB7, which enhances the dissociation of excitons.…”
Section: Resultsmentioning
confidence: 99%
“…Metallic NPs can be incorporated in the active layer, electrodes, and buffer layers of the OSCs. Performance changes due to the introduction of NPs in the active layer, charge transport layers and buffer layers of OSCs have been explored by researchers [9,[16][17][18][19]. Gold (Au) nanorods in the ETL (TiO 2 or ZnO) increase the PCE of the cell because of the light trapping due to the far-field effect scattering and increased electromagnetic field in the active layer [14].…”
Section: Introductionmentioning
confidence: 99%
“…Notably, by utilizing the LSPR effect of metallic nanoparticles (NPs) such as Au nanoparticles (Au NPs) and Ag nanoparticles (Ag NPs), NPs can be introduced into each part of the OSC devices for highly improved light harvesting [30][31][32][33][34][35][36] . Although some studies have reported the improvement of %PCEs by the incorporation of different metallic NPs into OSCs [37][38][39][40] , their effects on the charge separation and transport related to the high-efficiency of BHJ OSCs still need to be investigated in detail. Several research groups have reported that the presence of Ag NPs in the PEDOT:PSS HTL of OSCs leads to enhanced light harvesting performance due to their superior scattering efficiencies compared with those of other metallic NPs 41 .…”
Section: Introductionmentioning
confidence: 99%