Crystallization-Induced Energy Level Change of [6,6]-Phenyl-C61-Butyric Acid Methyl Ester (PCBM) Film: Impact of Polarization Energy
Crystallization-Induced Energy Level Change of [6,6]-Phenyl-C61-Butyric Acid Methyl Ester (PCBM) Film: Impact of Polarization Energy
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[6,6]-苯基-C61-丁酸甲酯 (PCBM) 薄膜结晶引起的能级变化：极化能的影响
DOI：
10.1021/jp506296j
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
and H. Yoshida
中科院分区：
文献类型：
--
作者：
Y. Zhong;S. Izawa;K. Hashimoto;K. Tajima;T. Koganezawa;and H. Yoshida
利用紫外光电子能谱、X射线光电子能谱和低能反向光电子能谱研究了热退火对[6，6]-苯基-C61-丁酸甲酯（PCBM）薄膜能级的影响.我们观察到，在150 °C下的热退火引起电离势（IP）和电子亲和力（EA）两者的降低，带隙变窄0.1eV。这些变化与结晶和2.54%的薄膜厚度减少。IP和EA的精确测量使得能够在基于单个PCBM分子中的电荷的模型中评估电子极化能量的影响。
The effect of thermal annealing on the energy levels of [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) films was investigated using ultraviolet photoelectron spectroscopy, X-ray photoelectron spectroscopy, and low-energy inverse photoemission spectroscopy. We observed that thermal annealing at 150 °C induces reductions of both the ionization potential (IP) and the electron affinity (EA) with a narrowing of the band gap by 0.1 eV. These changes are associated with crystallization and a 2.54% reduction in the film thickness. Precise measurements of both the IP and EA enabled an evaluation of the effects of the electronic polarization energy in a model based on the charge localized in a single PCBM molecule.