通过Alder-Ene反应介导的锡的抑制 (II) 氧化,用于高效的锡-佩洛夫斯基特太阳能电池
Wenjian Yan1, Mingzhe Zhu1, Feifei Xin1
1College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.
Angewandte Chemie (International ed. in English)
|July 26, 2024
概括
研究人员使用密度函数理论发现了锡 (II) 在矿前体中如何氧化. 添加甲氧化物 (BZHO) 防止了锡氧化,提高了太阳能电池的性能和稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 化学物理 化学物理
- 可再生能源是可再生能源的来源.
背景情况:
- (II) 氧化在混合-合物化前体矿中是一个已知的问题.
- 锡 (II) 氧化,特别是涉及DMSO的确切机制尚不清楚.
研究的目的:
- 为了阐明 (II) 氧化在矿前体溶液中的机制.
- 研究DMSO的作用,并确定抑制锡 (II) 氧化的策略.
- 为了提高矿太阳能电池的性能和稳定性.
主要方法:
- 用密度函数理论 (DFT) 模拟来研究反应机制.
- 用实验性表征来验证理论发现.
- 甲氧化物 (BZHO) 作为一种添加剂.
主要成果:
- DFT揭示了SnI2与DMSO协调,并与单片氧反应,形成Sn (IV).
- 发现BZHO通过Alder-ene反应与SnI2竞争氧气,有效抑制锡 (II) 氧化.
- 添加BZHO改善了矿膜结晶和表面电子结构.
- 使用BZHO的矿太阳能电池表现出更好的性能和稳定性,在800小时后保留了82%的PCE.
- 全矿联太阳能电池在BZHO处理下实现了26.76%的效率.
结论:
- 这项研究阐明了矿前体中的锡 (II) 氧化机制.
- BZHO是一种有效的添加剂,可以防止锡氧化,增强太阳能电池的稳定性.
- 这些发现为开发高性能,稳定的全矿联太阳能电池提供了有前途的战略.
相关概念视频
Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride
1.8K
Radical substitution reactions can be used to remove functional groups from molecules. The hydrogenolysis of alkyl halides is one such reaction, where the weak Sn–H bond in tributyltin hydride reacts with alkyl halides to form alkanes. Here, the reagent Bu3SnH yields tributyltin halide as a byproduct.
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation...
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation...
1.8K
Radical Reactivity: Concentration Effects
1.5K
In a radical reaction, the concentration of starting materials governs the selectivity of a radical. For example, the reaction between an alkyl halide and an alkene, in the presence of tin hydride and AIBN, begins with the generation of a tin radical. The generated radical then abstracts halogen from the alkyl halide, producing an alkyl radical. This alkyl radical can either react with tin hydride, yielding an alkane, or add to an alkene, generating a nitrile-stabilized radical, eventually...
1.5K
Alkenes via Reductive Coupling of Aldehydes or Ketones: McMurry Reaction
1.9K
The radical dimerization of ketones or aldehydes gives vicinal diols through a pinacol coupling reaction. However, the behavior of titanium metals used for the reaction as a source of electrons is unusual. When the reaction is carried out in the presence of titanium, diols can be isolated at low temperatures. Else titanium further reacts with diols, forming alkenes through the McMurry reaction.
1.9K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
10.0K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.0K


