Solution-processable MoOx nanocrystals enable highly efficient reflective and semitransparent polymer solar cells

Jagadamma, Lethy Krishnan; Hu, Hanlin; Kim, Taesoo; Ndjawa, Guy Olivier Ngongang; Mansour, Ahmed E.; Labban, Abdulrahman El; Faria, Jorge C. D.; Munir, Rahim; Anjum, Dalaver H.; McLachlan, Martyn A.; Amassian, Aram

doi:10.1016/j.nanoen.2016.08.019

Cited by 27 publications

(22 citation statements)

References 59 publications

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“…In other studies, AgNWs were successfully combined with other materials as composites, such as conducting PEDOT:PSS and even MoO x nanoparticles, but these can reduce optical transparency and add processing complexity. [ 30 ] The trade‐off between optical transparency and electrical conductivity needs to be optimized to fulfill the requirement of top TCEs. Without high‐temperature thermal processing to decrease the contact resistance between AgNWs, the rational design of AgNWs’ geometry is essential to ensure the excellent percolation and high conductivity of the nanowire network with simultaneously high transparency.…”

Section: Introductionmentioning

confidence: 99%

Novel Bimodal Silver Nanowire Network as Top Electrodes for Reproducible and High‐Efficiency Semitransparent Organic Photovoltaics

et al. 2020

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Semitransparent organic photovoltaics (ST-OPVs) provide a potentially facile route for some applications in building integrated photovoltaics. One of the challenges in developing large-scale, printable ST-OPVs is to address the need for highperformance and fully solution-processed top electrodes, allowing the replacement of the evaporated thin metallic films (Ag, Au, and Al). Silver nanowire (AgNW) is considered a promising candidate for the substitution due to its excellent transparency, conductivity, and solution processability. Herein, a novel bimodal AgNW (AgNW-BM) electrode is reported, comprising AgNWs of two different aspect ratios. It is shown that the AgNW-BM film achieves lower sheet resistance and higher visible transmittance than each monodisperse AgNW film, respectively. Furthermore, ST-OPVs based on PTB7-Th:IEICO-4F with AgNW-BM top electrodes are fabricated, which can obtain a maximum power conversion efficiency (PCE) of 7.49% with an average visible transmittance (AVT) of 33%. The ST-devices also demonstrate an enhanced reproducibility and excellent color-rendering index of 90. In addition, the bimodal top electrode is successfully implemented in the PM6:Y6 system with a higher PCE of 9.79% and with an AVT of 23%, demonstrating the universality for various semiconductor systems. Our work provides a simple strategy to realize fully solution-processed, highly efficient ST-OPVs.

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Section: Introductionmentioning

confidence: 99%

Novel Bimodal Silver Nanowire Network as Top Electrodes for Reproducible and High‐Efficiency Semitransparent Organic Photovoltaics

et al. 2020

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“…The J sc and V oc discrepancy of the evaporation‐free devices fabricated in different institutes originates from the raw material (active layer) difference since their evaporated counterparts show identical trend (Figure S16 and Table S3, Supporting Information). To the best our knowledge, the PCE of our evaporation‐free devices outperforms all of the reported devices with a solution‐processed top electrode including PEDOT:PSS, [ 5,23 ] Ag NWs, [ 3,4,22,32,33 ] Ag NPs/inks, [ 19,34–37 ] Ag pastes, [ 38,39 ] and graphene [ 21 ] (Figure 3f).…”

Section: Resultsmentioning

confidence: 69%

“…f) The PCE comparison of OSCs between this work and other works with a solution processed top electrode (The active layer materials information of some high performance OSCs are provided). [ 3–5,19,21–23,32–39 ]…”

Section: Resultsmentioning

confidence: 99%

“…[ 1,2 ] However, the current fully solution‐processed OSCs have only achieved a power conversion efficiency (PCE) of less than 12%, which is far below the devices with evaporated electrodes. [ 3–5 ] Such a low efficiency is ascribed to the fact that, during solution deposition process, the detrimental solvents, high temperature or mechanical force applied will exert on the whole device to cause material dissolution, corrosion, and/or poor inter‐layer contact, which finally deteriorate the OSC photovoltaic performances.…”

Section: Introductionmentioning

confidence: 99%

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Evaporation‐Free Organic Solar Cells with High Efficiency Enabled by Dry and Nonimmersive Sintering Strategy

Wang

Zhang

et al. 2021

Adv Funct Materials

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A solution‐processed top electrode is critical to unlock the full potential of all‐solution‐processed organic solar cells (OSCs) for practical applications. However, the enabled devices suffer from low efficiency (<12%) mainly because of the irreversible damages induced by the top‐electrode deposition process. Herein, a strategy of dry and nonimmersive sintering is demonstrated by introducing a hydrogen‐intercalated molybdenum oxide layer to sinter isolated Ag nanoparticles into the top electrode (all from solution process) with little influences/issues on underlying device structures. Fundamentally, it is unveiled that the intercalated hydrogen will bond with the amino group of the ligands around Ag nanoparticles, which promotes the exposed nanoparticles to merge along a certain crystal orientation (≈45°) and form a conductive electrode (8.6 Ω sq−1). Importantly, the sintered electrode offers 70% optical reflection in the 700–1050 nm wavelength region, which is essential to enhance the light absorption of high‐performance nonfullerene acceptors. Consequently, a record efficiency of 15% is achieved, driving all‐solution processed OSCs toward commercial applications.

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“…Carbon‐based 1D and 2D nanomaterials, such as carbon nanotubes, graphene oxide, reduce graphene oxide, and graphene, have demonstrated to improve the electrical conductivity of metal nanowire electrode, contributed by the enhanced conductivity at the junction region compensated by the conductive or semiconductive carbon nanomaterials. Inorganic semiconductive nanomaterial, such as TiO 2 , ZnO, ITO, FTO, AZO, IZO, ATO, SnO x , and MoO x , can also improve the conductivity of metal nanowire electrode through the vacuum‐based film deposition or the solution‐processed nanoparticles and sol–gel coating. The combination of metal NWs and the conductive polymer, such as PEDOT:PSS, has been shown to be a good candidate of transparent conductor …”

Section: The Front Metal Electrodementioning

confidence: 99%

Emerging Novel Metal Electrodes for Photovoltaic Applications

Ren

Ouyang

et al. 2018

Small

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Emerging novel metal electrodes not only serve as the collector of free charge carriers, but also function as light trapping designs in photovoltaics. As a potential alternative to commercial indium tin oxide, transparent electrodes composed of metal nanowire, metal mesh, and ultrathin metal film are intensively investigated and developed for achieving high optical transmittance and electrical conductivity. Moreover, light trapping designs via patterning of the back thick metal electrode into different nanostructures, which can deliver a considerable efficiency improvement of photovoltaic devices, contribute by the plasmon-enhanced light-mattering interactions. Therefore, here the recent works of metal-based transparent electrodes and patterned back electrodes in photovoltaics are reviewed, which may push the future development of this exciting field.

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Solution-processable MoOx nanocrystals enable highly efficient reflective and semitransparent polymer solar cells

Cited by 27 publications

References 59 publications

Novel Bimodal Silver Nanowire Network as Top Electrodes for Reproducible and High‐Efficiency Semitransparent Organic Photovoltaics

Novel Bimodal Silver Nanowire Network as Top Electrodes for Reproducible and High‐Efficiency Semitransparent Organic Photovoltaics

Evaporation‐Free Organic Solar Cells with High Efficiency Enabled by Dry and Nonimmersive Sintering Strategy

Emerging Novel Metal Electrodes for Photovoltaic Applications

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