Monitoring Charge Separation Processes in Quasi-One-Dimensional Organic Crystalline Structures,Nano Letters

当前位置： X-MOL 学术 › Nano Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Monitoring Charge Separation Processes in Quasi-One-Dimensional Organic Crystalline Structures
Nano Letters ( IF 9.6 ) Pub Date : 2017-09-11 00:00:00 , DOI: 10.1021/acs.nanolett.7b02471
Adrian Popescu ₁ , Robert A. Younts , Benjamin Hoffman , Terry McAfee ₂ , Daniel B. Dougherty , Harald W. Ade , Kenan Gundogdu , Igor V. Bondarev ₁

Affiliation

We perform the transient absorption spectroscopy experiments to investigate the dynamics of the low-energy collective electron–hole excitations in α-copper phthalocyanine thin films. The results are interpreted in terms of the third-order nonlinear polarization response function. It is found that, initially excited in the molecular plane, the intramolecular Frenkel exciton polarization reorients with time to align along the molecular chain direction to form coupled Frenkel–charge-transfer exciton states, the eigenstates of the one-dimensional periodic molecular lattice. The process pinpoints the direction of the charge separation in α-copper phthalocyanine and similar organic molecular structures. Being able to observe and monitor such processes is important both for understanding the physical principles of organic thin film solar energy conversion device operation and for the development of organic optoelectronics in general.

中文翻译：

监视准一维有机晶体结构中的电荷分离过程

我们进行瞬态吸收光谱实验，以研究α-铜酞菁薄膜中低能集体电子-空穴激发的动力学。根据三阶非线性极化响应函数来解释结果。发现，最初在分子平面中激发的分子内Frenkel激子极化随时间重新定向，沿着分子链方向排列，形成Frenkel-电荷转移激子耦合态，即一维周期性分子晶格的本征态。该过程指出了α-铜酞菁和类似有机分子结构中电荷分离的方向。

更新日期：2017-09-11

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11