对使用不同替代剂的捐赠者-皮林 (桥) -接受器系统的电荷转移效应进行全面分析
Itamar Borges1, Roberta M P O Guimarães1, Gabriel Monteiro-de-Castro1
1Departamento de Química, Instituto Militar de Engenharia (IME), Rio de Janeiro, Brazil.
Journal of computational chemistry
|August 28, 2023
概括
具有可调节的光物理性质的捐赠者 - 皮林 - 接受器 (DPA) 系统对有机电子学有很大的希望. 计算研究揭示了对激发状态的特定替代效应,指导了高效有机光伏 (OPV) 的设计.
科学领域:
- 计算化学计算化学
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
背景情况:
- 替代多循环芳香碳化合物烯的光物理特性可以通过供体和受体替代物进行修改.
- 捐赠者-皮林-受体 (DPA) 系统,如N,N-二甲基氨 (DMA) -皮林-三甲基 (TFM),对有机电子设备具有潜力.
- 之前的时间分辨率光谱研究强调了DPA系统的前景.
研究的目的:
- 用ADC(2) 方法计算地研究各种DPA系统的兴奋状态属性.
- 描述最低激发单元状态的电荷转移 (CT) 和局部激发 (LE) 字符.
- 通过分析HOMO和LUMO能量来评估这些DPA化合物的有机光伏 (OPV) 的潜力.
主要方法:
- 使用ab initio二次代数图形构造 (ADC(2) 方法进行电子结构计算.
- 研究了一系列DPA系统,其中包括多种多种的供体 (氨基,,甲氧) 和接受体 (亚,) 替代物.
- 分析了HOMO和LUMO能量水平和光学差距,以预测OPV性能.
主要成果:
- 对于DMA-pyrene-TFM系统,ADC(2) 的计算确定了一个明亮的S1状态 (LE) 和一个S2状态 (捐赠者到pyrene CT).
- 该研究描述了各种DPA化合物激发状态的CT和LE性质.
- 具有强受体组的化合物,如NO2,证明了增强的CT特征和对OPV有希望的特性.
结论:
- 计算方法为DPA系统的兴奋状态动态和电子特性提供了洞察力.
- 这些发现表明,DPA化合物具有特定的供体和受体替代物,可以有效地设计用于有机太阳能电池.
- 具有NO2受体组的系统显示出高性能有机光伏的巨大潜力.
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