通过电荷脱位增强的光电流生成,在DNA内组装的堆叠的 perylenediimide 染色体上进行电荷脱位
Tadao Takada1, Akane Ashida, Mitsunobu Nakamura
1Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo , 2167 Shosha, Himeji, Hyogo 671-2280, Japan.
Journal of the American Chemical Society
|May 3, 2014
概括
在DNA π 堆中堆叠的 perylenediimide (PDI) 分子显著增加光电流. 这种增强的发电源源来自于PDI二次元和三次元中的长时间电荷移位,这对于有效的电荷分离至关重要.
科学领域:
- 分子电子学分子电子学
- 有机半导体 有机半导体
- 超分子化学 超分子化学
背景情况:
- 二胺 (PDI) 分子是有机电子学中的关键染色体.
- 了解分子组件中的电荷转移动态对于设备效率至关重要.
研究的目的:
- 为了研究DNA模板PDI π-stack中的光电流生成和电荷转移.
- 阐明分子堆叠对电荷移位和载体寿命的作用.
主要方法:
- 制造DNA-PDI π-stack 阵列. 在DNA-PDI π-stack 阵列中.
- 光电流测量. 光电流测量.
- 五秒钟时间解析的短暂吸收光谱学.
主要成果:
- 与单体相比,PDI二聚体和三聚体的对面堆叠显著增强了光电流.
- 堆叠的PDI的激发导致了宽的短暂吸收波段,表明电荷移位.
- 用PDI二次元/三次元的充电移位寿命 (大约. 1 ns) 的时间大大长于单体的时间.
结论:
- 在DNA阵列中堆叠的面部PDI促进了电荷移位.
- 堆叠的PDI中电荷移位寿命的增加与增强的光电流生成直接相关.
- 用DNA模板设计的π-stack为高效的有机电子材料提供了一个有希望的策略.
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