Highly efficient new indoline dye having strong electron-withdrawing group for zinc oxide dye-sensitized solar cell
摘要:
New indoline dye (DN319) having strong electron-withdrawing dicyanovinylidene moiety and octyl group in the terminal rhodanine ring gave higher efficiency than D205, which was known as an excellent organic dye sensitizer. This result is attributed to the bathochromic shift in the UV-vis absorption band and positive shift in the E-ox level of DN319. (C) 2011 Elsevier Ltd. All rights reserved.
Narrow bandgap non-fullerene acceptor based on a thiophene-fused benzothiadiazole unit with a high short-circuit current density of over 20 mA cm<sup>−2</sup>
Organic solar cells based on a new non-fullerene acceptor containing a thiophene-fused benzothiadiazole unit and a polymer donor PTB7-Th showed a PCE of 9.07% with a high Jsc of over 20.33 mA cm−2.
(SF)-functioned 3D nonfullerene electron acceptors—SF-OR and SF-ORCN—that use rhodanine and 2-(1,1-dicyanomethylene)rhodanine as the terminal units, respectively, were designed and synthesized. These new acceptor materials show reversible electrochemical reduction and a high optical absorption coefficient, which are critical in device operation. Electronic and structural characterizations reveal that the
High open-circuit voltage solution-processed organic solar cells based on a star-shaped small molecule end-capped with a new rhodanine derivative
作者:Yuanhang Zhou、Weichao Chen、Zhengkun Du、Dangqiang Zhu、Dan Ouyang、Liangliang Han、Renqiang Yang
DOI:10.1007/s11426-014-5281-x
日期:2015.2
based on TCNR3TTPA:PC61BM (1:1, w / w ) exhibited a highopen-circuitvoltage ( V oc) of 0.99 V, a short-circuit current density ( J sc) of 5.76 mA/cm2, and a power conversion efficiency (PCE) of 2.50% under the illumination of AM 1.5 G, 100 mW/cm2. The high V oc is ascribed to the strong electron-with- drawing ability of the end-capped 2-(1,1-dicyanomethylene)-3-octyl rhodanine group. These results
设计了一个新的星形小分子TCNR3TTPA,其中三苯胺(TPA)单元为主要结构单元,2-(1,1-二氰基亚甲基)-3-辛基罗丹宁(CNR)为封端基团并合成。TCNR3TTPA显示出最深的最高占据分子轨道(HOMO)能级(−5.60 eV)和宽吸收。基于TCNR3TTPA:PC 61 BM(1:1, w / w )的固溶体块状异质结(BHJ)太阳能电池表现出0.99 V的高开路电压( V oc),短路电流密度( J sc)为5.76 mA / cm 2,在AM 1.5 G,100 mW / cm的光照下,功率转换效率(PCE)为2.50%2。较高的 V oc归因于封端的2-(1,1-二氰亚甲基)-3-辛基罗丹宁基团的强吸电子能力。这些结果表明,通过引入强吸电子的封端嵌段可以提高小分子有机太阳能电池的 V oc,这是设计用于有机太阳能电池的高性能小分子的有效策略。
Dicyanorhodanine-Pyrrole Conjugates for Visible Light-Driven Quantitative Photoswitching in Solution and the Solid State
作者:Parag Das、Nathan J. Grinalds、Ion Ghiviriga、Khalil A. Abboud、Łukasz Dobrzycki、Jiangeng Xue、Ronald K. Castellano
DOI:10.1021/jacs.4c00983
日期:——
biological processes, control photochemistry, and design smart materials. In this work, six novel dicyanorhodanine-based pyrrole-containing photoswitches are reported. The molecular design avails both the Z and E isomers from synthesis, where each can be isolated using chromatographic techniques. Inter- and intramolecular hydrogen bonding (H-bonding) interactions available to the E and Z isomers, respectively
小分子光电开关能够响应光在两种不同的分子状态之间切换,是监测生物过程、控制光化学和设计智能材料的多功能工具。在这项工作中,报道了六种新型的基于二氰基罗丹宁的含吡咯的光开关。分子设计利用了合成中的Z和E异构体,其中每种异构体都可以使用色谱技术分离。 E和Z异构体分别具有分子间和分子内氢键(H 键)相互作用,独特地赋予每种异构体长期的热稳定性。光异构化可以通过溶液核磁共振和紫外可见光谱技术以及互补的基态和激发态计算研究来评估,结果显示出良好的一致性。溶液中母体化合物(其中R = H)在 523 nm 照射下发生定量E → Z异构化,而使用 404 nm 照射的Z → E异构化提供 84/16 ( E / Z ) 的光稳态 (PSS) 比率。扩展吡咯单元的 π 共轭(其中R = p -C 6 H 4 –OMe)将最大吸收推至可见光谱的黄橙色区域,并允许在 404 和 595 nm 激发下进行双向