Enhanced Efficiency of Polymer/ZnO Nanorods Hybrid Solar Cell Sensitized by CdS Quantum Dots

Wang, Lidan; Zhao, Dongxu; Su, Zisheng; Li, Binghui; Zhang, Zhenzhong; Shen, Dezhen

doi:10.1149/1.3598171

Cited by 31 publications

(40 citation statements)

References 22 publications

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“…8 A strong increment of shoulder peak intensity as well as red-shift in ZnO/CuO absorption with longer t should be attributed to the absorption contribution from narrow bandgap of CuO. 7,14 The enhanced shoulder peak intensity also suggested the increased number of CuO-NPs on the ZnO nanorod surface, which is the same to the conclusion from observation in our SEM images (Figure 2). On the other hand, we also measured the absorption of MEH-PPV (normally used in HSCs as absorption component) and N719 dye (normally used in DSCs as absorption component), and compared them with ZnO/CuO (t ¼ 30 h) as inset in Figure 4.…”

Section: Cu(ch 3 Coo) 2 á H 2 O Ethanol Solution In Autoclave Because Of the Large Number Of Zn Vacancies (V Zn ) Onsupporting

confidence: 84%

“…At present, inorganic absorber sensitization of ZnO has been considered to be of great promise in increasing of in HSCs and DSCs. For example, deposition of CdS, 7 PbS, 8 or CdSe 9 narrow bandgap quantum dots on the ZnO nanoarray surface to formation of ZnO-CdS, ZnO-PbS, or ZnO-CdSe composite nanoarray have different effects on enhancement of device J sc and V oc . On the other hand, using inorganic semiconducting (CdS, 10 PbS, 11 CdSe, 12 and CuInS 2 13 ) as sensitizers due to the facile tenability instead of acid dye have drawn significant attention, which provides a new method in DSCs by narrow bandgap inorganic sensitization.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of ZnO/CuO composite coaxial nanoarrays by combined hydrothermal–solvothermal method and potential for solar cells

Zhang²,

et al. 2014

Journal of Composite Materials

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CuO nanoparticles (NPs) sensitized ZnO nanorod composite coaxial nanoarrays were successfully prepared by a combined hydrothermal−solvothermal method. Scanning electron microscopy images show that the number of CuO-NPs on ZnO nanorod surface can be controlled by the reaction time. Synthesis mechanism of ZnO/CuO nanoarray was studied in this work. The Cu2+ ions in solution would be captured by Zn vacancy on ZnO nanorod surface, and then combined with hydroxy groups in solution to formation Cu(OH)2, providing the initial nucleation for surface growth of CuO-NPs. Moreover, the optical absorption properties of ZnO/CuO nanoarray and energy band analysis suggest that CuO can both serve as the supplementary absorption material and electron acceptor for conjugate polymer in polymer–inorganic hybrid solar cells, or might become the light-harvesting material in dye-sensitized solar cells.

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Section: Cu(ch 3 Coo) 2 á H 2 O Ethanol Solution In Autoclave Because Of the Large Number Of Zn Vacancies (V Zn ) Onsupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Synthesis of ZnO/CuO composite coaxial nanoarrays by combined hydrothermal–solvothermal method and potential for solar cells

Zhang²,

et al. 2014

Journal of Composite Materials

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“…Bulk heterojunction PV devices utilizing zinc oxide nanowire arrays have shown high performance when prepared in conjunction with a variety of active materials including P3HT [3,4], PCBM:P3HT [5,6], CdS [7,8], dye-sensitizers [9,10] and colloidal quantum dot (QD) thin films [1]. The minority carrier diffusion length in the active material of these devices lies in the nano-to micrometer length scale.…”

Section: Introductionmentioning

confidence: 99%

Control of zinc oxide nanowire array properties with electron-beam lithography templating for photovoltaic applications

et al. 2015

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Hydrothermally synthesized zinc oxide nanowire arrays have been used as nanostructured acceptors in emerging photovoltaic (PV) devices. The nanoscale dimensions of such arrays allow for enhanced charge extraction from PV active layers, but the device performance critically depends on the nanowire array pitch and alignment. In this study, we templated hydrothermally-grown ZnO nanowire arrays via high-resolution electron-beam-lithography defined masks, achieving the dual requirements of high-resolution patterning at a pitch of several hundred nanometers, while maintaining hole sizes small enough to control nanowire array morphology. We investigated several process conditions, including the effect of annealing sputtered and spincoated ZnO seed layers on nanowire growth, to optimize array property metrics -branching from individual template holes and off-normal alignment. We found that decreasing template hole size decreased branching prevalence but also reduced alignment. Annealing seed layers typically improved alignment, and sputtered seed layers yielded nanowire arrays superior to spincoated seed layers. We show that these effects arose from variation in the size of the template holes relative to the ZnO grain size in the seed layer.The quantitative control of branching and alignment of the nanowire array that is achieved in this study will open new paths toward engineering more efficient electrodes to increase photocurrent in nanostructured PVs. This control is also applicable to inorganic nanowire growth in general, nanomechanical generators, nanowire transistors, and surface-energy engineering.2

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“…Photoelectrochemical solar cells based on TiO 2 nanocrystalline films sensitized with organic dyes have been studied intensely for the past 20 years as a potential promising lowcost alternative to traditional solid-state solar cells. Semiconductor nanocrystals with narrow band gap such as CdS, CdSe, PbS, and InP were also demonstrated as efficient sensitizers in the spectral range from the visible to mid infrared with advantages such as low-cost fabrication, good stability, multiple exciton generation, and the tunability of optical properties and electronic structure by changing the size of nanocrystals [1,2]. The photoelectrochemical cells with semiconductor nanocrystals as sensitizers also were called quantum dot sensitized solar cells (QDSSCs) [1].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photovoltaic Properties of the Solar Cells Based on Cosensitization of CdS and Hydrogenation

Yang

Ren

et al. 2015

Journal of Nanomaterials

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The hydrogenated TiO2porous nanocrystalline film is modified with CdS quantum dots by successive ionic layer adsorption and reaction (SILAR) method to prepare the cosensitized TiO2solar cells by CdS quantum dots and hydrogenation. The structure and topography of the composite photoanode film were confirmed by X-ray diffraction and scanning electron microscopy. With deposited CdS nanoparticles, UV absorption spectra of H:TiO2photoanode film indicated a considerably enhanced absorption in the visible region. The cosensitized TiO2solar cell by CdS quantum dots and hydrogenation presents much better photovoltaic properties than either CdS sensitized TiO2solar cells or hydrogenated TiO2solar cells, which displays enhanced photovoltaic performance with power conversion efficiency (η) of 1.99% (Jsc=6.26 mA cm−2,Voc=0.65 V, and FF = 0.49) under full one-sun illumination. The reason for the enhanced photovoltaic performance of the novel cosensitized solar cell is primarily explained by studying the Nyquist spectrums, IPCE spectra, dark current, and photovoltaic performances.

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Enhanced Efficiency of Polymer/ZnO Nanorods Hybrid Solar Cell Sensitized by CdS Quantum Dots

Cited by 31 publications

References 22 publications

Synthesis of ZnO/CuO composite coaxial nanoarrays by combined hydrothermal–solvothermal method and potential for solar cells

Synthesis of ZnO/CuO composite coaxial nanoarrays by combined hydrothermal–solvothermal method and potential for solar cells

Control of zinc oxide nanowire array properties with electron-beam lithography templating for photovoltaic applications

Enhanced Photovoltaic Properties of the Solar Cells Based on Cosensitization of CdS and Hydrogenation

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