在子[1,2-b:4,5-b']二硫-[3,4-c]罗-4,6-聚合物的线性侧链中,直接自我组装和太阳能电池性能
Clément Cabanetos1, Abdulrahman El Labban, Jonathan A Bartelt
1King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
Journal of the American Chemical Society
|March 12, 2013
概括
侧链结构对散装异质连接 (BHJ) 太阳能电池的π结合聚合物自组装产生了重大影响. 线性侧链降低了效率,而优化分支链提高了PBDTTPD聚合物的性能.
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:
- 在π合聚合物中溶解的侧链影响薄膜设备的自组装和性能.
- 预测侧链结构对聚合物特性的影响仍然具有挑战性.
研究的目的:
- 为了研究线性与分支侧链在聚[1,2-b:4,5-b']二硫-[3,4-c]-4,6-) (PBDTTPD) 聚合物中的作用,用于批量异质连接 (BHJ) 太阳能电池.
- 为了将聚合物自我组装和骨干方向与太阳能电池效率相关联.
主要方法:
- 合成和表征了具有不同侧链结构 (线性与分支) 的PBDTTPD聚合物.
- 使用这些聚合物和PC71BM作为接受器制造的BHJ太阳能电池.
- 分析了薄膜形态和聚合物方向.
主要成果:
- 用BDT图案将分支侧链替换为线性链,严重改变了自组装和骨干方向,导致太阳能电池效率大幅下降.
- 对于分支BDT图案,控制线性TPD图案中的异形碳数可以提高材料性能.
- 在BHJ设备中,通过PBDTTPD聚合物实现了8.5%的功率转换效率和0.97V的开放电路电压.
结论:
- 线性侧链由于自我组装和方向的改变,会对BHJ太阳能电池中的PBDTTPD聚合物性能产生负面影响.
- 优化分支侧链结构,特别是TPD图案,对于高性能PBDTTPD聚合物至关重要.
- 聚合物PBDTTPD聚合物显示出承诺,作为高频段间隙细胞的高效捐赠者,在并联太阳能电池中.
相关概念视频
[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction
The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.
Stability of Conjugated Dienes
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.
Structure of Conjugated Dienes
Introduction
Conjugated dienes are compounds characterized by the presence of alternating double and single bonds. In a conjugated system like 1,3-butadiene, the unhybridized 2p orbital on each carbon overlaps continuously, allowing the π electrons to be delocalized across the entire molecule. In contrast, this type of overlap does not occur in cumulated and isolated dienes, such as 2,3-pentadiene and 1,4-pentadiene, respectively. Instead, the π electrons remain localized between the double...
Conjugated dienes are compounds characterized by the presence of alternating double and single bonds. In a conjugated system like 1,3-butadiene, the unhybridized 2p orbital on each carbon overlaps continuously, allowing the π electrons to be delocalized across the entire molecule. In contrast, this type of overlap does not occur in cumulated and isolated dienes, such as 2,3-pentadiene and 1,4-pentadiene, respectively. Instead, the π electrons remain localized between the double...


