共查询到20条相似文献,搜索用时 15 毫秒
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Wei Ma John R. Tumbleston Ming Wang Eliot Gann Fei Huang Harald Ade 《Liver Transplantation》2013,3(7):864-872
Domain purity and interface structure are known to be critical for fullerene‐based bulk heterojunction (BHJ) solar cells, yet have been very difficult to study. Using novel soft X‐ray tools, we delineate the importance of these parameters by comparing high performance cells based on a novel naphtha[1,2‐c:5,6‐c]bis[1,2,5]thiadiazole (NT) material to cells based on a 2,1,3‐benzothiadiazole (BT) analogue. BT‐based devices exhibit ~15 nm, mixed domains that differ in composition by at most 22%, causing substantial bimolecular recombination. In contrast, NT‐based devices have more pure domains that are >80 nm in size, yet the polymer‐rich phase still contains at least 22% fullerene. Power conversion efficiency >6% is achieved for NT devices despite a domain size much larger than the nominal exciton diffusion length due to a favourable trade‐off in the mixed domain between exciton harvesting, charge transport, and bimolecular recombination. The miscibility of the fullerene with the NT and BT polymer is measured and correlated to the purity in devices. Importantly, polarized x‐ray scattering reveals preferential face‐on orientation of the NT polymer relative to the PCBM‐rich domains. Such ordering has previously not been observed in fullerene‐based solar cells and is shown here to be possibly a controlling or contributing factor to high performance. 相似文献
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Jiangbin Zhang Moritz H. Futscher Vincent Lami Felix U. Kosasih Changsoon Cho Qinying Gu Aditya Sadhanala Andrew J. Pearson Bin Kan Giorgio Divitini Xiangjian Wan Dan Credgington Neil C. Greenham Yongsheng Chen Caterina Ducati Bruno Ehrler Yana Vaynzof Richard H. Friend Artem A. Bakulin 《Liver Transplantation》2019,9(47)
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Organic Solar Cells: Following the Morphology Formation In Situ in Printed Active Layers for Organic Solar Cells (Adv. Energy Mater. 1/2016) 下载免费PDF全文
Stephan Pröller Feng Liu Chenhui Zhu Cheng Wang Thomas P. Russell Alexander Hexemer Peter Müller‐Buschbaum Eva M. Herzig 《Liver Transplantation》2016,6(1)
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Solar Cells: Electrical Performance of Organic Solar Cells with Additive‐Assisted Vertical Phase Separation in the Photoactive Layer (Adv. Energy Mater. 2/2014) 下载免费PDF全文
Min Kim Joo‐Hyun Kim Hyun Ho Choi Jong Hwan Park Sae Byeok Jo Myungsun Sim Jong Soo Kim Hiroshi Jinnai Yeong Don Park Kilwon Cho 《Liver Transplantation》2014,4(2)
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Organic Solar Cells: A New Interconnecting Layer of Metal Oxide/Dipole Layer/Metal Oxide for Efficient Tandem Organic Solar Cells (Adv. Energy Mater. 17/2015) 下载免费PDF全文
Shunmian Lu Xing Guan Xinchen Li Wei E. I. Sha Fengxian Xie Hongchao Liu Jiannong Wang Fei Huang Wallace C. H. Choy 《Liver Transplantation》2015,5(17)
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Organic Solar Cells: Carrier‐Selectivity‐Dependent Charge Recombination Dynamics in Organic Photovoltaic Cells with a Ferroelectric Blend Interlayer (Adv. Energy Mater. 19/2015) 下载免费PDF全文
Sae Byeok Jo Min Kim Dong Hun Sin Jaewon Lee Heung Gyu Kim Hyomin Ko Kilwon Cho 《Liver Transplantation》2015,5(19)
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Jean Roncali 《Liver Transplantation》2011,1(2):147-160
An overview of various approaches for the realization of single‐material organic solar cells (SMOCs) is presented. Fullerene‐conjugated systems dyads, di‐block copolymers, and self‐organized donor‐acceptor molecules all represent different possible approaches towards SMOCs. Although each of them presents specific advantages and poses specific problems of design and synthesis, these different routes have witnessed significant progress in the past few years and SMOCs with efficiencies in the range of 1.50% have been realized. These performances are already higher than those of bi‐component bulk heterojunction solar cells some ten years ago, demonstrating that SMOCs can represent a credible approach towards efficient and simple organic solar cells. Possible directions for future research are discussed with the aim of stimulating further research on this exciting topic. 相似文献