共查询到20条相似文献,搜索用时 15 毫秒
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Earth‐Abundant Chalcogenide Photovoltaic Devices with over 5% Efficiency Based on a Cu2BaSn(S,Se)4 Absorber 下载免费PDF全文
Donghyeop Shin Tong Zhu Xuan Huang Oki Gunawan Volker Blum David B. Mitzi 《Advanced materials (Deerfield Beach, Fla.)》2017,29(24)
In recent years, Cu2ZnSn(S,Se)4 (CZTSSe) materials have enabled important progress in associated thin‐film photovoltaic (PV) technology, while avoiding scarce and/or toxic metals; however, cationic disorder and associated band tailing fundamentally limit device performance. Cu2BaSnS4 (CBTS) has recently been proposed as a prospective alternative large bandgap (~2 eV), environmentally friendly PV material, with ~2% power conversion efficiency (PCE) already demonstrated in corresponding devices. In this study, a two‐step process (i.e., precursor sputter deposition followed by successive sulfurization/selenization) yields high‐quality nominally pinhole‐free films with large (>1 µm) grains of selenium‐incorporated (x = 3) Cu2BaSnS4?x Sex (CBTSSe) for high‐efficiency PV devices. By incorporating Se in the sulfide film, absorber layers with 1.55 eV bandgap, ideal for single‐junction PV, have been achieved within the CBTSSe trigonal structural family. The abrupt transition in quantum efficiency data for wavelengths above the absorption edge, coupled with a strong sharp photoluminescence feature, confirms the relative absence of band tailing in CBTSSe compared to CZTSSe. For the first time, by combining bandgap tuning with an air‐annealing step, a CBTSSe‐based PV device with 5.2% PCE (total area 0.425 cm2) is reported, >2.5× better than the previous champion pure sulfide device. These results suggest substantial promise for the emerging Se‐rich Cu2BaSnS4–x Sex family for high‐efficiency and earth‐abundant PV. 相似文献
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On p. 240, Klaus Meerholz and co‐workers show control over the aggregation of P3HT in solution by mixing a dipolar, but miscible solvent to the coating solution. The resulting nanoparticle dispersions are stable and allow a quantitative comparison of the absorption spectra of amorphous and aggregated P3HT. These results are interesting not only because they allow control of morphology on the nanometer scale, but they also show a path to low‐cost morphological control of large‐area films, which is an essential step for the commercialization of plastic PV devices. 相似文献
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A. Cravino P. Leriche O. Alvêque S. Roquet J. Roncali 《Advanced materials (Deerfield Beach, Fla.)》2006,18(22)
The cover image illustrates the dual photovoltaic and electroluminescence function of a single‐layer device based on a thienylenevinylene–triphenylamine with internal charge transfer (ICT), as reported by Cravino, Roncali, and co‐workers on p. 3033. The material forms an organic glass with isotropic electronic properties while ICT leads simultaneously to an extension of the photoresponse to the red and to an increase of the open circuit voltage. The use of an additional layer of C60 further improves the photovoltaic. Images of the sun and moon courtesy NASA/JPL–Caltech. 相似文献
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Solar Cells: High‐Entropy Mixtures of Pristine Fullerenes for Solution‐Processed Transistors and Solar Cells (Adv. Mater. 45/2015) 下载免费PDF全文
Amaia Diaz de Zerio Mendaza Armantas Melianas Stephan Rossbauer Olof Bäcke Lars Nordstierna Paul Erhart Eva Olsson Thomas D. Anthopoulos Olle Inganäs Christian Müller 《Advanced materials (Deerfield Beach, Fla.)》2015,27(45):7249-7249
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Liquid‐Crystalline Elastomers: High‐Resolution 3D Direct Laser Writing for Liquid‐Crystalline Elastomer Microstructures (Adv. Mater. 15/2014) 下载免费PDF全文
Hao Zeng Daniele Martella Piotr Wasylczyk Giacomo Cerretti Jean‐Christophe Gomez Lavocat Chih‐Hua Ho Camilla Parmeggiani Diederik Sybolt Wiersma 《Advanced materials (Deerfield Beach, Fla.)》2014,26(15):2285-2285
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Polymer Solar Cells: Light‐Soaking‐Free Inverted Polymer Solar Cells with an Efficiency of 10.5% by Compositional and Surface Modifications to a Low‐Temperature‐Processed TiO2 Electron‐Transport Layer (Adv. Mater. 1/2017) 下载免费PDF全文
Yu Yan Feilong Cai Liyan Yang Jinghai Li Yiwei Zhang Fei Qin Chuanxi Xiong Yinhua Zhou David G. Lidzey Tao Wang 《Advanced materials (Deerfield Beach, Fla.)》2017,29(1)