Balanced carrier transport in organic solar cells employing embedded indium-tin-oxide nanoelectrodes

Hsu, Min-Hsiang; Yu, Peichen; Huang, Jen-Hsien; Chang, Che‐Wei; Wu, Chien‐Wei; Cheng, Yu-Chih; Chu, Chih‐Wei

doi:10.1063/1.3556565

Cited by 42 publications

(31 citation statements)

References 17 publications

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“…The incorporation of metal NPs into PEDOT:PSS increased both the surface roughness of the PEDOT:PSS layer and the PEDOT:PSS/P3HT:PCBM interface area. It has been reported that an increased surface roughness of the buffer layer as well as an enlarged interface area of PEDOT:PSS/P3HT:PCBM lead to shortening of the hole-extraction route and enhancement of the hole-collection efficiency by the anode [15,22,25]. The reduced series resistance ( R s ) from 1.8 to 1.5 Ωcm 2 in Table 1 is another indicator of the improved hole collection and ultimately, the enhancement of J sc and FF.…”

Section: Resultsmentioning

confidence: 99%

In situ-prepared composite materials of PEDOT: PSS buffer layer-metal nanoparticles and their application to organic solar cells

et al. 2012

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We report an enhancement in the efficiency of organic solar cells via the incorporation of gold (Au) or silver (Ag) nanoparticles (NPs) in the hole-transporting buffer layer of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), which was formed on an indium tin oxide (ITO) surface by the spin-coating of PEDOT:PSS-Au or Ag NPs composite solution. The composite solution was synthesized by a simple in situ preparation method which involved the reduction of chloroauric acid (HAuCl4) or silver nitrate (AgNO3) with sodium borohydride (NaBH4) solution in the presence of aqueous PEDOT:PSS media. The NPs were well dispersed in the PEDOT:PSS media and showed a characteristic absorption peak due to the surface plasmon resonance effect. Organic solar cells with the structure of ITO/PEDOT:PSS-Au, Ag NPs/poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM)/LiF/Al exhibited an 8% improvement in their power conversion efficiency mainly due to the enlarged surface roughness of the PEDOT:PSS, which lead to an improvement in the charge collection and ultimately improvements in the short-circuit current density and fill factor.

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Section: Resultsmentioning

confidence: 99%

In situ-prepared composite materials of PEDOT: PSS buffer layer-metal nanoparticles and their application to organic solar cells

et al. 2012

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“…Therefore, the incorporation of Au NPs only in PEDOT:PSS increases the interfacial contact area between the P3HT:PCBM and PEDOT:PSS, allowing more efficient hole collection at the anode and hence improves J SC and FF. 14,15 Furthermore, from resistive devices of structure ITO/PEDOT:PSS (with or without Au NPs)/Al, it is found that the resistance of PEDOT:PSS reduces upon addition of NPs (Supporting information: Fig. S3 (Ref.…”

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confidence: 99%

Improving the efficiency of polymer solar cells by incorporating gold nanoparticles into all polymer layers

Xie

Choy

Wang

et al. 2011

Applied Physics Letters

162

110

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We demonstrate efficiency improvement in polymer solar cells (PSCs) by $22% through incorporating Au nanoparticles (NPs) into all polymer layers. Au NPs are found to have distinct mechanisms in improving device performance when incorporated in different polymer layers. Au NPs in poly-(3,4-ethylenedioxythiophene):poly(styrenesulfonate) mainly contribute to better hole collection while Au NPs in active layer contributes to the enhanced optical absorption and more balanced charge-transport. Our theoretical result shows that the absorption enhancement at the active layer is attributed to plasmon resonances with strong near-field distributions penetrated into absorption polymers. These findings can be applied to design high-efficiency metallic NPs-incorporated PSCs. V

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“…The strategies that address the issue of absorption or carrier extraction all rely on decoupling optical and electrical thicknesses of solar cells. For example, solar cell configurations such as radial junction nanowire (NW) PV [3,4], and projected electrodes [5,6] focus on decoupling the light absorption from the carrier extraction length by absorbing light vertically, but separating the carrier laterally. These structures provide a shorter and more efficient path for carrier collection.…”

Section: Introductionmentioning

confidence: 99%

Enhanced light trapping in solar cells with a meta-mirror following generalized Snell’s law

Khan¹,

Wang²,

Bermel³

et al. 2014

Opt. Express

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As the performance of photovoltaic cells approaches the Shockley-Queisser limit, appropriate schemes are needed to minimize the losses without compromising the current performance. In this paper we propose a planar absorber-mirror light trapping structure where a conventional mirror is replaced by a meta-mirror with asymmetric light scattering properties. The meta-mirror is tailored to have reflection in asymmetric modes that stay outside the escape cone of the dielectric, hence trapping light with unit probability. Ideally, the meta-mirror can be designed to have such light trapping for any angle of incidence onto the absorber-mirror structure. We illustrate the concept by using a simple gap-plasmon meta-mirror. Even though the response of the mirror is non-ideal with the unwanted scattering modes reducing the light absorption, we observe an order of magnitude enhancement compared to single pass absorption in the absorber. The bandwidth of the enhancement can be matched with the range of wavelengths close to the solar cell absorber band-edge where improved light absorption is required.

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Balanced carrier transport in organic solar cells employing embedded indium-tin-oxide nanoelectrodes

Cited by 42 publications

References 17 publications

In situ-prepared composite materials of PEDOT: PSS buffer layer-metal nanoparticles and their application to organic solar cells

In situ-prepared composite materials of PEDOT: PSS buffer layer-metal nanoparticles and their application to organic solar cells

Improving the efficiency of polymer solar cells by incorporating gold nanoparticles into all polymer layers

Enhanced light trapping in solar cells with a meta-mirror following generalized Snell’s law

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