Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9776499 | Synthetic Metals | 2005 | 4 Pages |
Abstract
The photovoltaic properties of an aza H2Pc containing four 1,10-phenanthroline subunits were investigated by means of surface photovoltage spectroscopy and electric-field-induced surface photovoltage spectroscopy. The surface photovoltaic response was enhanced under positive electric field and weakened under negative electric field. Thus, the expanded aza H2Pc was judged to be p-type semiconductor. From the similar response behavior, the Q-band and high-energy side of Soret-band were assigned to Ï-Ï* transition. Interestingly, the low-energy side of Soret-band exhibits blue shift under external electric field. According to the influence of electric field on the ground state of n-orbital with high polarizability, it was assigned to n-Ï* transition. We think the peripheral substituent units play a key role in the electronic transition and photovoltaic processes.
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Authors
Xiaoke Hou, Xiguang Du, Chunyu Ma, Yan Li, Qinglin Zhang, Xu Wang, Yuchun Chang, Wenhai Jiang, Chuanhui Cheng, Shijun Shan, Guotong Du,