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Nazek El‐Atab Nadeem Qaiser Rabab Bahabry Muhammad Mustafa Hussain 《Liver Transplantation》2019,9(45)
Stretchable solar cells are of growing interest due their key role in realizing many applications such as wearables and biomedical devices. Ultrastretchability, high energy‐efficiency, biocompatibility, and mechanical resilience are essential characteristics of such energy harvesting devices. Here, the development of wafer‐scale monocrystalline silicon solar cells with world‐record ultrastretchability (95%) and efficiency (19%) is demonstrated using a laser‐patterning based corrugation technique. The demonstrated approach transforms interdigitated back contacts (IBC) based rigid solar cells into mechanically reliable but ultrastretchable cells with negligible degradation in the electric performance in terms of current density, open‐circuit voltage, and fill factor. The corrugation method is based on the creation of alternating grooves resulting in silicon islands with different shapes. The stretchability is achieved by orthogonally aligning the active silicon islands to the applied tensile stress and using a biocompatible elastomer (Ecoflex) as a stretchable substrate. The resulting mechanics ensure that the brittle silicon areas do not experience significant mechanical stresses upon asymmetrical stretching. Different patterns are studied including linear, diamond, and triangular patterns, each of which results in a different stretchability and loss of active silicon area. Finally, finite element method based simulation is conducted to study the generated deformation in the different patterned solar cells. 相似文献
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Solar Cells: Quaternary Organic Solar Cells Enhanced by Cocrystalline Squaraines with Power Conversion Efficiencies >10% (Adv. Energy Mater. 21/2016)
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Tenghooi Goh Jing‐Shun Huang Kevin G. Yager Matthew Y. Sfeir Chang‐Yong Nam Xiao Tong Louise M. Guard Patrick R. Melvin Francisco Antonio Benjamin G. Bartolome Minjoo L. Lee Nilay Hazari André D. Taylor 《Liver Transplantation》2016,6(21)
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Hui‐Chun Fu Vinoth Ramalingam Hyunho Kim Chun‐Ho Lin Xiaosheng Fang Husam N. Alshareef Jr‐Hau He 《Liver Transplantation》2019,9(22)
MXene, a new class of 2D materials, has gained significant attention owing to its attractive electrical conductivity, tunable work function, and metallic nature for wide range of applications. Herein, delaminated few layered Ti3C2Tx MXene contacted Si solar cells with a maximum power conversion efficiency (PCE) of ≈11.5% under AM1.5G illumination are demonstrated. The formation of an Ohmic junction of the metallic MXene to n+‐Si surface efficiently extracts the photogenerated electrons from n+np+‐Si, decreases the contact resistance, and suppresses the charge carrier recombination, giving rise to excellent open‐circuit voltage and short‐circuit current density. The rapid thermal annealing process further improves the electrical contact between Ti3C2Tx MXene and n+‐Si surface by reducing sheet resistance, increasing electrical conductivity, and decreasing cell series resistance, thus leading to a remarkable improvement in fill factor and overall PCE. The work demonstrated here can be extended to other MXene compositions as potential electrodes for developing highly performing solar cells. 相似文献
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Solar Cells: Synergic Interface Optimization with Green Solvent Engineering in Mixed Perovskite Solar Cells (Adv. Energy Mater. 20/2017)
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Tongle Bu Lan Wu Xueping Liu Xiaokun Yang Peng Zhou Xinxin Yu Tianshi Qin Jiangjian Shi Song Wang Saisai Li Zhiliang Ku Yong Peng Fuzhi Huang Qingbo Meng Yi‐Bing Cheng Jie Zhong 《Liver Transplantation》2017,7(20)
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Solar Cells: Ionic Liquid Control Crystal Growth to Enhance Planar Perovskite Solar Cells Efficiency (Adv. Energy Mater. 20/2016)
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Ji‐Youn Seo Taisuke Matsui Jingshan Luo Juan‐Pablo Correa‐Baena Fabrizio Giordano Michael Saliba Kurt Schenk Amita Ummadisingu Konrad Domanski Mahboubeh Hadadian Anders Hagfeldt Shaik M. Zakeeruddin Ullrich Steiner Michael Grätzel Antonio Abate 《Liver Transplantation》2016,6(20)
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Yanbo Wang Yamin Zhang Nailiang Qiu Huanran Feng Huanhuan Gao Bin Kan Yanfeng Ma Chenxi Li Xiangjian Wan Yongsheng Chen 《Liver Transplantation》2018,8(15)
Three acceptor–donor–acceptor type nonfullerene acceptors (NFAs), namely, F–F, F–Cl, and F–Br, are designed and synthesized through a halogenation strategy on one successful nonfullerene acceptor FDICTF (F–H). The three molecules show red‐shifted absorptions, increased crystallinities, and higher charge mobilities compared with the F–H. After blending with donor polymer PBDB‐T, the F–F‐, F–Cl‐, and F–Br‐based devices exhibit power conversion efficiencies (PCEs) of 10.85%, 11.47%, and 12.05%, respectively, which are higher than that of F–H with PCE of 9.59%. These results indicate that manipulating the absorption range, crystallinity and mobilities of NFAs by introducing different halogen atoms is an effective way to achieve high photovoltaic performance, which will offer valuable insight for the designing of high‐efficiency organic solar cells. 相似文献
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Yuanbao Lin Yingzhi Jin Sheng Dong Wenhao Zheng Junyu Yang Alei Liu Feng Liu Yufeng Jiang Thomas P. Russell Fengling Zhang Fei Huang Lintao Hou 《Liver Transplantation》2018,8(13)
The current work reports a high power conversion efficiency (PCE) of 9.54% achieved with nonfullerene organic solar cells (OSCs) based on PTB7‐Th donor and 3,9‐bis(2‐methylene‐(3‐(1,1‐dicyanomethylene)‐indanone))‐5,5,11,11‐tetrakis(4‐hexylphenyl)‐dithieno[2,3‐d:2′,3′‐d′]‐s‐indaceno[1,2‐b:5,6‐b′]dithiophene) (ITIC) acceptor fabricated by doctor‐blade printing, which has the highest efficiency ever reported in printed nonfullerene OSCs. Furthermore, a high PCE of 7.6% is realized in flexible large‐area (2.03 cm2) indium tin oxide (ITO)‐free doctor‐bladed nonfullerene OSCs, which is higher than that (5.86%) of the spin‐coated counterpart. To understand the mechanism of the performance enhancement with doctor‐blade printing, the morphology, crystallinity, charge recombination, and transport of the active layers are investigated. These results suggest that the good performance of the doctor‐blade OSCs is attributed to a favorable nanoscale phase separation by incorporating 0.6 vol% of 1,8‐diiodooctane that prolongs the dynamic drying time of the doctor‐bladed active layer and contributes to the migration of ITIC molecules in the drying process. High PCE obtained in the flexible large‐area ITO‐free doctor‐bladed nonfullerene OSCs indicates the feasibility of doctor‐blade printing in large‐scale fullerene‐free OSC manufacturing. For the first time, the open‐circuit voltage is increased by 0.1 V when 1 vol% solvent additive is added, due to the vertical segregation of ITIC molecules during solvent evaporation. 相似文献