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2H-WS₂与PDI的非共价液相功能化:具有长寿命电荷分离的能量转换平台

Tobias Scharl¹, Gerhard Binder², Xin Chen²

¹Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany.

Journal of the American Chemical Society

|March 28, 2022

概括

剥离的二硫化物 (WS2) 与二化物相结合,产生了新的电子捐赠者-受体混合物. 这些混合体在绿色光激发时表现出长寿命的电荷分离状态,推进太阳能转换材料.

科学领域:

材料科学
纳米技术
太阳能发电

背景情况:

过渡金属二化物 (TMD) 和WS2是太阳能应用的有前途的二维材料.
研究主要集中在TMD的内在性质上,对其非共价混合体的探索较少.
皮WS2与其他电活性材料的整合以提高功能尚未得到充分研究.

研究的目的:

通过剥皮WS2和二胺 (PDIs) 探索非共价混合体的产生.
调查这些WS2-PDI混合体的电子捐赠/接受特征.
评估混合体中的光物理特性和电荷分离动力学.

主要方法:

剥离WS2以获得二维纳米片.
用可见光吸收二化物皮的WS2的整合.
对混合材料进行光谱检测 (例如,紫外线吸收,光发光).
用光刺激研究探测电荷分离动力学.

主要成果:

成功形成了WS2-PDI电子捐赠者-接受者混合体.
确认WS2在混合结构中的独特电子捐赠性.
支持WS2和PDI之间的电子捐赠者/接受者相互作用的光谱证据.
在绿色光照激发WS2-PDI混合体时观察长寿命的电荷分离状态.

结论:

WS2-PDI混合动力是太阳能转换的多功能平台.
对于形成有效的电荷分离状态,WS2的电子捐赠特性至关重要.
这些发现为设计基于TMD的先进光伏材料开辟了新的途径.

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