Performance enhancement in inverted polymer solar cells incorporating ultrathin Au and LiF modified ZnO electron transporting interlayer

Lü, Zhe; Chen, Xiaohong; Zhou, Jianping; Jiang, Ziyao; Huang, Sumei; Zhu, Fu Rong; Piao, Xianqing; Sun, Zhuo

doi:10.1016/j.orgel.2014.12.032

Cited by 24 publications

(23 citation statements)

References 35 publications

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“…Instead, the performance enhancement originates mainly from improved conductivity of the PEDOT:PSS layer and decreased hole travel path by introducing Au NPs. Recently, Z. Lu et al obtained a PCE increase from 2.62% to 3.67% in an inverted P3HT:PC 61 BM OPV device by inserting an ultrathin Au/LiF interlayer between the ITO and ZnO(20 nm) electron transport layer . The report concluded that the enhanced performance results primarily from the reduced contact barrier and improved conductivity of the Au/LiF modified ZnO electron transport layer.…”

Section: Achieving Efficient Opv Devices Through Optical Engineering mentioning

confidence: 99%

Recent Advances in Organic Photovoltaics: Device Structure and Optical Engineering Optimization on the Nanoscale

Luo

Ren

Zhang

et al. 2016

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Organic photovoltaic (OPV) devices, which can directly convert absorbed sunlight to electricity, are stacked thin films of tens to hundreds of nanometers. They have emerged as a promising candidate for affordable, clean, and renewable energy. In the past few years, a rapid increase has been seen in the power conversion efficiency of OPV devices toward 10% and above, through comprehensive optimizations via novel photoactive donor and acceptor materials, control of thin-film morphology on the nanoscale, device structure developments, and interfacial and optical engineering. The intrinsic problems of short exciton diffusion length and low carrier mobility in organic semiconductors creates a challenge for OPV designs for achieving optically thick and electrically thin device structures to achieve sufficient light absorption and efficient electron/hole extraction. Recent advances in the field of OPV devices are reviewed, with a focus on the progress in device architecture and optical engineering approaches that lead to improved electrical and optical characteristics in OPV devices. Successful strategies are highlighted for light wave distribution, modulation, and absorption promotion inside the active layer of OPV devices by incorporating periodic nanopatterns/nanostructures or incorporating metallic nanomaterials and nanostructures.

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Section: Achieving Efficient Opv Devices Through Optical Engineering mentioning

confidence: 99%

Recent Advances in Organic Photovoltaics: Device Structure and Optical Engineering Optimization on the Nanoscale

Luo

Ren

Zhang

et al. 2016

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“…If this material is thin enough for an electron to pass through the gap between the cathode and active layer, band bending occurs. Consequently, the energy barrier between the cathode and active layer decreases, and electrons move efficiently owing to the tunneling effects [16][17][18]. Lee et al [16] reported the improvement of the efficiency from 2.1% to 4.0% for a poly(3-hexylthiophene) (P3HT): [6,6]-phenyl C 61 butyric acid Inverted solar cells Tunneling effect Dipole layer Metal fluoride A B S T R A C T Metal fluorides (e.g., LiF and BaF 2 ) are usually introduced as an electron transport layer in conventional polymer solar cells (PSCs).…”

Section: Introductionmentioning

confidence: 99%

“…Sun et al [18] reported that the efficiency was improved from 2.5% to 3.5% by introducing LiF on the ITO in an inverted structure. However, because LiF or BaF 2 layer must be formed through vacuum deposition owing to the low solubility, the process becomes complicated, and the unit price increases.…”

Section: Introductionmentioning

confidence: 99%

Enhancement in performance of polymer solar cells by introducing solution-processed dipole interlayer

Han

Lee

Han

et al. 2016

Journal of Industrial and Engineering Chemistry

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“…Among these materials, ZnO is more attractive for its high optical transparency, environmentally friendly nature, relatively higher electron mobility, Ohmic contact with the organic layer and blocking capability for the UVlight induced photodegradation of organic materials. To add a thin layer of ZnO into inverted organic solar cells, different methods, including the magnetron sputter, MOCVD, CVD, ALD, sol-gel, solvothermal and ZnO (NPs) methods, can be utilized [13,14]. From the consideration of the economy, process and environmental protection, the solvothermal is the best in these methods.…”

Section: Introductionmentioning

confidence: 99%

Solvothermal synthesis of ZnO nanoparticles at low temperatures as cathode buffer layers for polymer solar cells with an inverted device structure

Luo

Liu

Zhang

et al. 2016

J Mater Sci: Mater Electron

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Inverted polymer solar cells of the conventional poly(3-hexylthiophene) (P3HT):(6,6)-phenyl-C61butyric acid methyl ester (PC 61 BM) blend on indium tin oxide substrates were fabricated. By using mixed-solvent dispersed ZnO nanoparticles (NPs) as cathode buffer layer, device performances are improved obviously. ZnO NPs with a size of 3-5 nm synthesized by solvothermal synthesis at 65°C show relatively wide photoluminescence peak of 300-650 nm. Based on Hansen solubility parameter theory, a mathematical method was applied to calculate the Hansen solubility parameters of bi-solvent system to disperse ZnO NPs and the proportion of each component in the mixed solvent. This excellent dispersion for ZnO NPs in the bi-solvent system has a important influence on the performance of the device. Compared to other methods of ZnO nanofilm fabrication, this method reveals a simple, convenient, moderate and effective way to manufacture the favorable buffer layer in organic solar cells.

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Performance enhancement in inverted polymer solar cells incorporating ultrathin Au and LiF modified ZnO electron transporting interlayer

Cited by 24 publications

References 35 publications

Recent Advances in Organic Photovoltaics: Device Structure and Optical Engineering Optimization on the Nanoscale

Recent Advances in Organic Photovoltaics: Device Structure and Optical Engineering Optimization on the Nanoscale

Enhancement in performance of polymer solar cells by introducing solution-processed dipole interlayer

Solvothermal synthesis of ZnO nanoparticles at low temperatures as cathode buffer layers for polymer solar cells with an inverted device structure

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