超快激子-极化子退相干动力学控制polymer太阳能电池中光生载流子的产生效率吗？
Do ultrafast exciton-polaron decoherence dynamics govern photocarrier generation efficiencies in polymer solar cells?
摘要：
全有机基光伏太阳能电池由于其低成本加工和短的能量回收期而引起了相当大的关注。在这样的系统中，光激发到一对光载流子的初级解离最近已被证明是非常迅速和有效的，但这仍然是不清楚的物理原因。在这里，二维光电流激发光谱，一种新的非线性光学光谱，是用来探测超快相干衰减的光激发到电荷产生状态的聚合物：富勒烯为基础的太阳能电池。二维光电流谱解释通过引入一个理论模型的描述的电子状态的耦合系统的外部环境和所施加的激光场。实验数据表明，在二维光电流谱中没有交叉峰，正如模型预测的激子和光电流产生态之间的相干时间为20 fs或更小。
英文摘要：
All-organic-based photovoltaic solar cells have attracted considerable attention because of their low-cost processing and short energy payback time. In such systems the primary dissociation of an optical excitation into a pair of photocarriers has been recently shown to be extremely rapid and efficient, but the physical reason for this remains unclear. Here, two-dimensional photocurrent excitation spectroscopy, a novel non-linear optical spectroscopy, is used to probe the ultrafast coherent decay of photoexcitations into charge-producing states in a polymer:fullerene based solar cell. The two-dimensional photocurrent spectra are interpreted by introducing a theoretical model for the description of the coupling of the electronic states of the system to an external environment and to the applied laser fields. The experimental data show no cross-peaks in the two-dimensional photocurrent spectra, as predicted by the model for coherence times between the exciton and the photocurrent producing states of 20\,fs or less.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
