Efficiency Enhancement in Bulk-Heterojunction Solar Cells Integrated with Large-Area Ag Nanotriangle Arrays

Wu, Bo; Oo, Than Zaw; Li, Xianglin; Liu, Xinfeng; Wu, Xiangyang; Yeow, Edwin K. L.; Fan, Hong Jin; Mathews, Nripan; Sum, Tze Chien

doi:10.1021/jp303672f

Cited by 46 publications

(49 citation statements)

References 30 publications

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“…49 In some instances, plasmonic nanostructures have been embedded in interlayers, in which a front transparent electrode was still employed (typically ITO). These structures have been demonstrated for 1-D gratings, 48,67 circular gratings, 171 nanotriangles, 172,173 nanodisks, 174 and NW arrays. 51 Nanosphere lithography has typically been used to fabricate ordered arrays of nanotriangles on a PEDOT:PSS-coated ITO layer, 172,173 and solution-based AgNWs have been used between the PEDOT:PSS and the P3HT:PCBM layers (also incorporating ITO as the transparent electrode), leading to a 1.18 enhancement factor in the efficiency of conventional devices incorporating these types of plasmonic interlayers.…”

Section: Plasmonic Interlayersmentioning

confidence: 99%

“…These structures have been demonstrated for 1-D gratings, 48,67 circular gratings, 171 nanotriangles, 172,173 nanodisks, 174 and NW arrays. 51 Nanosphere lithography has typically been used to fabricate ordered arrays of nanotriangles on a PEDOT:PSS-coated ITO layer, 172,173 and solution-based AgNWs have been used between the PEDOT:PSS and the P3HT:PCBM layers (also incorporating ITO as the transparent electrode), leading to a 1.18 enhancement factor in the efficiency of conventional devices incorporating these types of plasmonic interlayers. 51 The majority of studies to-date on plasmonic interlayers incorporating continuous metallic nanostructures have been computational, as opposed to studies of interlayers consisting of discrete metallic NPs, which have been both experimental and computational.…”

Section: Plasmonic Interlayersmentioning

confidence: 99%

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Plasmonic electrodes for bulk-heterojunction organic photovoltaics: a review

et al. 2015

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Abstract. Here, we review recent progress on the integration of plasmonic electrodes into bulkheterojunction organic photovoltaic devices. Plasmonic electrodes, consisting of thin films of metallic nanostructures, can exhibit a number of optical, electrical, and morphological effects that can be exploited to improve performance parameters of ultrathin photovoltaic active layers. We review the various types of plasmonic electrodes that have been incorporated into organic photovoltaics such as nanohole, nanowire, and nanoparticle arrays and grating electrodes and their impact on various device performance parameters. The use of plasmonic back electrodes can impact device performance in a number of ways because the mechanisms of performance improvements are often a complex combination of optical, electrical, and structural effects. Inverted bulk heterojunction device architectures have been shown to benefit from the multifunctionality of plasmonic back electrodes as they can minimize space-charge effects and reduce hole carrier collection lengths in addition to providing improved light localization in the active layer. The use of semi-transparent plasmonic electrodes can also be beneficial for organic photovoltaics as they can exhibit a variety of optical properties such as light scattering, light localization, extraordinary transmission of light, and absorption-induced transparency, in addition to providing an alternative to metal oxide-based transparent electrodes. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Section: Plasmonic Interlayersmentioning

confidence: 99%

Section: Plasmonic Interlayersmentioning

confidence: 99%

Plasmonic electrodes for bulk-heterojunction organic photovoltaics: a review

et al. 2015

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“…For instance, metallic nanoparticles (NPs) have been commonly employed as subwavelength antennas and scattering centres to enhance the absorption of BHJ films 3 . Typically, these metal NPs are either embedded in the charge transfer layer such as PEDOT:PSS [4][5][6][7] or simply blended within the active BHJ layer [8][9][10][11] . In the latter approach, NPs coated with organic ligands are typically used to disperse the particles within the organic blends.…”

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confidence: 99%

Uncovering loss mechanisms in silver nanoparticle-blended plasmonic organic solar cells

et al. 2013

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There has been much controversy over the incorporation of organic-ligand-encapsulated plasmonic nanoparticles in the active layer of bulk heterojunction organic solar cells, where both enhancement and detraction in performance have been reported. Here through comprehensive transient optical spectroscopy and electrical characterization, we demonstrate evidence of traps responsible for performance degradation in plasmonic organic solar cells fabricated with oleylamine-capped silver nanoparticles blended in the poly (3-hexylthiophene):[6,6]-phenyl-C 61-butyric acid methyl ester active layer. Despite an initial increase in exciton generation promoted by the presence of silver nanoparticles, transient absorption spectroscopy reveals no increase in the later free polaron population-attributed to fast trapping of polarons by nearby nanoparticles. The increased trap-assisted recombination is also reconfirmed by light intensity-dependent electrical measurements. These new insights into the photophysics and charge dynamics of plasmonic organic solar cells would resolve the existing controversy and provide clear guidelines for device design and fabrication.

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“…Naturally, these motifs have also been investigated for their application in solar cells [172,173]. In contrast to dielectric structures as described above the evaporated layer thicknesses typically range in the few tens of nanometers for gold, silver or aluminum.…”

Section: Structured Electrodes From Close-packed Colloidal Monolayersmentioning

confidence: 99%

Colloidal self-assembly concepts for light management in photovoltaics

et al. 2015

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Colloidal particles show interaction with electromagnetic radiation at optical frequencies. At the same time clever colloid design and functionalization concepts allow for versatile particle assembly providing monolayers of macroscopic dimensions. This has led to a significant interest in assembled colloidal structures for light harvesting in photovoltaic devices. In particular thin-film solar cells suffer from weak absorption of incoming photons. Consequently light management using assembled colloidal structures becomes vital for enhancing the efficiency of a given device. This review aims at giving an overview of recent developments in colloid synthesis, functionalization and assembly with a focus on light management structures in photovoltaics. We distinguish between optical effects related to the single particle properties as well as collective optical effects, which originate from the assembled structures.Colloidal templating approaches open yet another dimension for controlling the interaction with light. We focus in this respect on structured electrodes that have received much attention due to their dual functionality as light harvesting systems and conductive electrodes and highlight the impact of interparticle spacing for templating.

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Efficiency Enhancement in Bulk-Heterojunction Solar Cells Integrated with Large-Area Ag Nanotriangle Arrays

Cited by 46 publications

References 30 publications

Plasmonic electrodes for bulk-heterojunction organic photovoltaics: a review

Plasmonic electrodes for bulk-heterojunction organic photovoltaics: a review

Uncovering loss mechanisms in silver nanoparticle-blended plasmonic organic solar cells

Colloidal self-assembly concepts for light management in photovoltaics

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