排序方式: 共有289条查询结果,搜索用时 15 毫秒
71.
72.
Benedikt Platzer Dr. Beatrice Berionni Berna Dr. Martina Bischetti Prof. Daniel O. Cicero Prof. Roberto Paolesse Prof. Sara Nardis Prof. Tomás Torres Prof. Dirk M. Guldi 《Chemistry (Weinheim an der Bergstrasse, Germany)》2022,28(13):e202103891
Electron-donating corroles (Cor) were integrated with electron-accepting phthalocyanines (Pc) to afford two different non-covalent Cor ⋅ Pc systems. At the forefront was the coordination between a 10-meso-pyridine Cor and a ZnPc. The complexation was corroborated in a combination of NMR, absorption, and fluorescence assays, and revealed association with binding constants as high as 106 m −1. Steady-state and time-resolved spectroscopies evidenced that regardless of exciting Cor or Pc, the charge-separated state evolved efficiently in both cases, followed by a slow charge-recombination to reinstate the ground state. The introduction of non-covalent linkages between Cor and Pc induces sizeable differences in the context of light harvesting and transfer of charges when compared with covalently linked Cor-Pc conjugates. 相似文献
73.
Dr. Víctor Mariñas Benedikt Platzer Jorge Labella Dr. Fabrizio Caroleo Prof. Sara Nardis Prof. Roberto Paolesse Prof. Dirk M. Guldi Prof. Tomás Torres 《Chemistry (Weinheim an der Bergstrasse, Germany)》2022,28(60):e202201552
Porphyrinoids are considered perfect candidates for their incorporation into electron donor–acceptor (D–A) arrays due to their remarkable optoelectronic properties and low reorganization energies. For the first time, a series of subphthalocyanine (SubPc) and corrole (Cor) were covalently connected through a short-range linkage. SubPc axial substitution strategies were employed, which allowed the synthesis of the target molecules in decent yields. In this context, a qualitative synthetic approach was performed to reverse the expected direction of the different electronic events. Consequently, in-depth absorption, fluorescence, and electrochemical assays enabled the study of electronic and photophysical properties. Charge separation was observed in cases of electron-donating Cors, whereas a quantitative energy transfer from the Cor to the SubPc was detected in the case of electron accepting Cors. 相似文献
74.
Jung‐Hsun Tsai Chu‐Chen Chueh Wen‐Chang Chen Chao‐Ying Yu Gue‐Wuu Hwang Ching Ting En‐Chen Chen Hsin‐Fei Meng 《Journal of polymer science. Part A, Polymer chemistry》2010,48(11):2351-2360
New low band gap thiophene‐phenylene‐thiophene ( TPT )‐based donor‐acceptor‐donor random copolymers were synthesized for optoelectronic device applications by a palladium‐catalyzed Stille coupling reaction under microwave heating. The acceptors included 2,3‐bis(4‐(2‐ethylhexyloxy)phenyl)‐5,8‐bis[5′‐bromo‐dithien‐2‐yl‐quinoxalines] ( DTQ ) and 3,6‐bis(5‐bromothiophen‐2‐yl)‐2,5‐bis(2‐ethyl‐hexyl)‐pyrrolo[3,4‐c]‐pyrrole‐1,4‐dione ( DPP ). The prepared random copolymers were named as PTPTDTQ0.55 , PTPTDTQ0.34DPP0.14 , and PTPTDTQ0.26DPP0.34 depending on the copolymer ratio. The optical band gaps (E) of PTPTDTQ0.55 , PTPTDTQ0.34DPP0.14 , and PTPTDTQ0.26DPP0.34 were 1.74, 1.56, and 1.48 eV, respectively. The hole mobility obtained from the field‐effect transistor devices prepared from PTPTDTQ0.55 , PTPTDTQ0.34DPP0.14 , and PTPTDTQ0.26DPP0.34 were 2.2 × 10?3, 2.4 × 10?3, and 4.7 × 10?3 cm2 V?1 s?1, respectively, with the on‐off ratios of 4.0 × 104, 4.0 × 104, and 5.3 × 104. It suggested that the significant intramolecular charge transfer between the TPT and acceptor led to the band gap reduction and hole mobility enhancement. Polymer solar cells of these TPT ‐based copolymers blended with 1‐(3‐methoxycarbonyl)propyl‐1‐phenyl‐[6,6]‐C‐71 (PC71BM) under illumination of AM 1.5G (100 mW cm?2) solar simulator exhibited a power conversion efficiency (PCE) as high as 3.71%. Besides, the near‐infrared photodetector device prepared from PTPTDTQ0.26DPP0.34 showed a high external quantum efficiency exceeding 32% at 700 nm (under ?3 V bias) and fast‐speed response. This study suggests that the prepared TPT ‐based donor‐acceptor random copolymers exhibited promising and versatile applications on optoelectronic devices. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 2351–2360, 2010 相似文献
75.
76.
77.
社会的发展离不开能源的发现与创造,光伏能源的多形式运用在能源领域大放异彩,室 内光伏器件逐渐成为大家所关注的热点。室内光伏IPV (Indoor photovoltaics) 作为低照度条件 下的电源,可以满足低功率电子器件的工作要求。本文主要比较了基于硅、染料、III-V 族半导 体、有机化合物和卤化物钙钛矿这些不同类型的IPV 器件。得益于卤化物钙钛矿活性层具有优 异的光物理特性,钙钛矿光伏具有成为高性能室内光伏器件的潜力。与此同时也讨论了室内光伏 的局限性。最后,提出了制备生产高效率、无毒、稳定的钙钛矿室内光伏器件的解决方案以及未 来应用展望。 相似文献
78.
硒化亚锗(GeSe)禁带宽度合适(≈1.14 eV), 吸光系数大(>105 cm-1), 迁移率高(128.7 cm2•V–1•s–1), 价带顶中包含反键轨道赋予了其本征缺陷良性, 理论光电转换效率可达30%以上, 适合于制作高效薄膜太阳能电池; 同时GeSe具有毒性低、储量丰富、组分简单及稳定性强等优点, 还易于通过低成本的升华法进行薄膜制备, 从而在大规模应用方面具有巨大潜力. 以GeSe为研究对象, 介绍了GeSe基本性质, 总结了GeSe薄膜制备研究进展, 阐述了GeSe薄膜太阳能电池研究现状, 并展望了其今后发展方向与趋势. 相似文献
79.
F. Schauer 《Czechoslovak Journal of Physics》2003,53(12):1245-1255
The aim of the paper is to give the present state of the art in solar cells based on organic solid-state films. After short outline of the history of the field, the main trends in development of plastic solar cells are presented. The main obstacles, facing the field of photovoltaic conversion in solid films systems with organic semiconductors to be solved in future, are slow transport of charge-carriers, difficulties in contacts forming and stability towards ambient and UV radiation. 相似文献
80.
Pierre‐Luc T. Boudreault Alexandre Michaud Mario Leclerc 《Macromolecular rapid communications》2007,28(22):2176-2179
A new soluble conjugated copolymer based on 2,7‐dibenzosilole and 4,7‐dithien‐2‐yl‐2,1,3‐benzothiadiazole units has been synthesized (PBSDTBT). Bulk heterojunction solar cell devices are fabricated using this material as the donor and [6,6]‐phenyl‐C61 butyric acid methyl ester (PCBM) as the acceptor. The power conversion efficiency is 1.6% under AM1.5 illumination. This material also shows a good VOC (0.97 V). The results are quite promising considering the relatively large bandgap (1.9 eV) of this polymer.