Structural, Optical, and Electrical Properties of Semiconducting ZnO Nanosheets

Park, Jae-Hwan; Kang, Gyo-Sung; Kwon, Sung-Yeol; Lim, Dong-Gun; Choi, Young–Jin; Choi, Kihwan; Park, Jae–Gwan

doi:10.1166/jnn.2008.ic07

Cited by 8 publications

(4 citation statements)

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“…The most representative TMOs EEL is ZnO, which possesses several favorable physical properties including good transparency, high electron mobility, non-toxicity and low production cost. 46,47 ZnO is a n-type metal oxide with a LUMO and a HOMO energy level around À4.3 eV and À7.6 eV, respectively. The LUMO energy level of the commonly used electron acceptors (e.g., PC 61 BM and PC 71 BM) is about À4.3 eV, and the HOMO energy level of the electron donors is around À5.0 eV, indicating that ZnO is a good EEL and hole blocking layer in BHJ OPVs.…”

Section: Transition Metal Oxidesmentioning

confidence: 99%

Inverted organic photovoltaic cells

et al. 2016

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The advance in lifestyle, modern industrialization and future technological revolution are always at high expense of energy consumption. Unfortunately, there exist serious issues such as limited storage, high cost and toxic contamination in conventional fossil fuel energy sources. Instead, solar energy represents a renewable, economic and green alternative in the future energy market. Among the photovoltaic technologies, organic photovoltaics (OPVs) demonstrate a cheap, flexible, clean and easy-processing way to convert solar energy into electricity. However, OPVs with a conventional device structure are still far away from industrialization mainly because of their short lifetime and the energy-intensive deposition of top metal electrode. To address the stability and cost issue simultaneously, an inverted device structure has been introduced into OPVs, bridging laboratory research with practical application. In this review, recent progress in device structures, working mechanisms, functions and advances of each component layer as well their correlations with the efficiency and stability of inverted OPVs are reviewed and illustrated.

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Section: Transition Metal Oxidesmentioning

confidence: 99%

Inverted organic photovoltaic cells

et al. 2016

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“…All these studies indicated that the performance of PSCs with an inverted device structure is sensitive to the interface between the ITO cathode and the active layer. Recently, zinc oxide (ZnO) has drawn much attention because it has a good transparency in the whole visible region and a good electron mobility. − Moreover, the ZnO thin film can be easily deposited from corresponding solution via various solution processes, following thermal annealing treatment. All these features make ZnO an ideal material as a buffer layer for PSCs with an inverted device structure. , …”

Section: Introductionmentioning

confidence: 99%

Solution-Processed Zinc Oxide Thin Film as a Buffer Layer for Polymer Solar Cells with an Inverted Device Structure

et al. 2010

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A solution-processed zinc oxide (ZnO) thin film as a buffer layer for polymer solar cells (PSCs) with an inverted device structure has been demonstrated. A power conversion efficiency (PCE) of 3.8% was observed from an inverted device structure with the ZnO buffer layer. Without the ZnO layer, PSCs only show a PCE of 1.67%, which is less than half the value observed from PSCs with the ZnO buffer layer. When operated at room temperature, no obvious degradation was observed from the PSCs with the ZnO layer after continuously illuminating the devices for 4 h. However, a significant degradation was observed from the PSCs without the ZnO buffer layer after illuminating the devices only for 1 h. Furthermore, PSCs with the ZnO buffer layer also show very good shelf stability; only 5% degradation was observed in PCEs after 47 days. All these results demonstrate that the ZnO buffer layer plays an important role in the enhancement of PSCs’ performance with an inverted device structure.

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“…Several chemical methods for the synthesis of ZnO in pure and even mixed with metal oxides have already been reported, a few of those methods like sol-gel [20,[27][28][29][30], hydro (solvo)-thermal [15][16][17][31][32][33][34][35][36][37], and some other works [38][39][40][41][42][43][44][45] on synthesis and application of ZnO nanostructures may be visited. Intensive research has been focused on fabricating one-dimensional ZnO nanostructures and in correlating their morphologies with their size-related optical and electrical properties [12, 15-17, 33, 37, 38].…”

Section: Introductionmentioning

confidence: 99%

High electro-catalytic activities of glucose oxidase embedded one-dimensional ZnO nanostructures

Sarkar¹,

Bhattacharyya

2013

Nanotechnology

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One-dimensional ZnO nanorods and nanowires are separately synthesized on Zn substrate by simple hydrothermal processes at low temperatures. Electro-catalytic responses of glucose oxidase/ZnO/Zn electrodes using these two synthesized nanostructures of ZnO are reported and compared with others available in literature. It is apparent the Michaelis-Menten constant, [Formula: see text], for the present ZnO nanowire, having a greater aspect ratio, is found to be the lowest when compared with others. This sensor shows lower oxidation peak potential with a long detection range of 6.6 μM-380 mM and the highest sensitivity of ∼35.1 μA cm(-2) mM(-1), among the reported values in the literature. Enzyme catalytic efficiency and turnover numbers are also found to be remarkably high.

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Structural, Optical, and Electrical Properties of Semiconducting ZnO Nanosheets

Cited by 8 publications

References 0 publications

Inverted organic photovoltaic cells

Inverted organic photovoltaic cells

Solution-Processed Zinc Oxide Thin Film as a Buffer Layer for Polymer Solar Cells with an Inverted Device Structure

High electro-catalytic activities of glucose oxidase embedded one-dimensional ZnO nanostructures

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