相关实验视频
Updated: Mar 7, 2026
06:15
Interactive Molecular Model Assembly with 3D Printing
Published on: August 13, 2020
11.1K
双形状锁可使稳定和高效的非富勒烯受体没有外环维尼尔连接
Zhe Hao1,2, Siyuan Li1,2, Zhilong He1,2
1School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
ACS applied materials & interfaces
|March 5, 2026
概括
研究人员通过结合双构造锁,为有机太阳能电池 (OSC) 开发了新的非烯受体 (NFAs). 这一战略提高了效率和稳定性,克服了光伏材料开发中的一个关键挑战.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 太阳能光伏发电是如何实现的
背景情况:
- 有机太阳能电池 (OSC) 面临商业化障碍,原因是光伏材料的内在不稳定性.
- 非富勒烯受体 (NFAs) 中的外环维尼烯链接是光化学降解的主要原因.
- 用C-C单键链接替换乙烯链接可以提高稳定性,但可能会导致形状障碍并降低设备性能.
研究的目的:
- 设计和合成新的AD-A型NFAs,克服有机太阳能电池的效率-稳定性权衡.
- 通过战略性结构锁定,增强NFA中的分子平面性和分子间包装.
- 提高NFA的光稳定性和热稳定性,以实现长期的运行可行性.
主要方法:
- 合成了三种AD-A型NFAs,其中C-C单键连接了电子丰富的核心和缺电子的终端.
- 将异构原子 (和基) 纳入NFAs,以诱导非共价相互作用 (F··S和S··O) 进行构型锁定.
- 描述了合成的NFA和制造的OSC设备的结构,光学和形态特性.
主要成果:
- 双重构造锁定策略导致高度平面的NFAs,具有增强的分子内电荷转移和有序的分子间包装.
- NFA 呈现出巴托克罗米转移的吸收,改进的光子收获,以及精细的批量异质连接形态.
- 使用F6OF接受器的有机太阳能电池实现了10.45%的功率转换效率,具有特殊的光稳定性 (94.0%在72小时的照明后) 和热稳定性 (96.2%在100°C的144小时火后).
结论:
- 双形状锁定策略是一种有前途的方法,可以同时实现有机光伏的高效率和长期运行稳定性.
- 具有有限的C-C单键旋转的战略设计的NFA提供了一条克服传统乙烯基接受器局限性的途径.
- 这项工作为开发下一代有机光伏材料提供了新的设计范式,其性能和耐用性得到了提高.
更多相关视频
09:35Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
Published on: September 18, 2016
12.2K
10:19Single-Molecule FRET Imaging for Observing the Conformational Dynamics of Dynamin-Like GTPase Atlastin
Published on: January 24, 2025
1.1K
相关概念视频
01:28Stability of Conjugated Dienes
4.6K
Introduction
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
4.6K
02:02Chair Conformation of Cyclohexane
20.3K
The chair conformation is the most stable form of cyclohexane due to the absence of angle and torsional strain. The absence of angle strain is a result of cyclohexane’s bond angle being very close to the ideal tetrahedral bond angle of 109.5° in its chair conformer. Similarly, the torsional strain is also absent owing to the perfectly staggered arrangement of bonds.
The hydrogen atoms linked to carbons are arranged in two different axial and equatorial orientations to achieve this...
The hydrogen atoms linked to carbons are arranged in two different axial and equatorial orientations to achieve this...
20.3K
02:11Conformations of Cyclohexane
16.6K
Cyclohexane does not exist in a planar form due to the high angle and torsional strain it would experience in the planar structure. Instead, it adopts non-planar chair and boat conformations.
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
16.6K
01:26Photochemical Electrocyclic Reactions: Stereochemistry
2.3K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
2.3K
02:18Conformations of Ethane and Propane
18.6K
In an organic molecule, free rotation about the carbon-carbon single bond results in energetically different conformers of the molecule. Due to this rotation, called the internal rotation, ethane has two major conformations — staggered and eclipsed.
Staggered conformation is a low energy and more stable conformation with the C-H bonds on the front carbon placed at 60°dihedral angles relative to the C-H bonds on the back carbon, leading to a reduced torsional strain. In staggered...
Staggered conformation is a low energy and more stable conformation with the C-H bonds on the front carbon placed at 60°dihedral angles relative to the C-H bonds on the back carbon, leading to a reduced torsional strain. In staggered...
18.6K
02:20Conformations of Butane
19.5K
Unlike ethane and propane that have only two major conformations, butane has more than two conformers. The staggered form of butane in which the bulky methyl groups on the two carbons are placed on opposite sides, that is, at a dihedral angle of 180°, is the lowest energy, most stable form — called the anti conformer. This conformation is stabilized due to the absence of steric repulsion between the largely spaced out methyl groups. The other two staggered conformations are...
19.5K