课程名称︰电子与光电高分子 课程性质︰选修 课程教师︰陈文章教授 开课学院：工学院 开课系所︰化学系(所)、高分子所 考试日期（年月日）︰2007/04/02 考试时限（分钟）：100 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : 1.From the point of view on chemical structure and electronic structure, please describe why polyethylene and polyacetylene are insulator and semiconductor, respectively. (10 point) 2.Please describe the definitions of ionization potential, electronic affinity, and bandwidth and draw the energy diagram for them. (20 points) 3.Please describe the definitions of soliton, polaron, and bipolaron. (10 points) 4.Please explain why conjugated polymers require high levels of doping to achieve high conductivity and compare with inorganic semiconductors such as Si. (20 points) 5.If polythiophene is doped by I2, please describe the doping mechanism using polaron and bipolaron by chemical structure as well as by energy diagram. (20 points) 6.Explain why conjugated polymers have poor solubility and the possible strategies to improve the solubility. (10 points) 7.Could we achieve zero band gap for conjugated polymers? If it is possible, please suggest your idea. (10 points) --

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