| 二嵌段共聚物-(PPP)x-(PA)y-的态密度特征 |
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| 引用本文： | 李宏光,冯名诚,程杰,李宏,刘德胜.二嵌段共聚物-(PPP)x-(PA)y-的态密度特征[J].山东大学学报(理学版),2002,37(2):137-140. |
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| 作者姓名： | 李宏光 冯名诚 程杰 李宏 刘德胜 |
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| 作者单位： | 物理与微电子学院 |
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| 基金项目： | 山东省自然科学基金资助项目 |
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| 摘 要： | 在紧束缚近似的基础上，对均聚物－（PPP）x－（PA）y－以及二嵌段共聚物－（PPP）x－（PA）y－的态密度（DOS）进行了计算分析，发现共聚物的态密度与均聚物地态密度有着显著的区别，共聚物的带隙的大小介于大带隙的－（PPP）x－和小带隙的－（PA）y－之间，在共聚物中与－(PPP)x-的导带和价带的子带隙以有共聚物的导带底和价带顶中，所存在捅态密度只有由－（PA）y－来提供，而在共聚物的价带底和导带顶的能态密度则取决于－（PPP）x－的态密度。
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| 关 键 词： | 二嵌段共聚物 （PPP）x （PA）y 均聚物 态密度 带隙 导带 价带 聚乙炔 聚对苯撑 能态分布 |
| 文章编号： | 0559-7234(2002)02-0137-04 |
| 修稿时间： | 2001年10月10 |
DENSITY OF STATES OF-(PPP)x-(PA)y-DIBLOCK COPOLYMERS |
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| LI Hong guang,FENG Ming cheng,CHENG Jie,LI Hong and LIU Desheng.DENSITY OF STATES OF-(PPP)x-(PA)y-DIBLOCK COPOLYMERS[J].Journal of Shandong University,2002,37(2):137-140. |
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| Authors: | LI Hong guang FENG Ming cheng CHENG Jie LI Hong and LIU Desheng |
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| Abstract: | Density of states(DOS)of (PPP) y homopolymer, (PA) x homopolymer and (PA) x (PPP) y diblock copolymers have been studied by using a tight binding calculation. It was found that the density of states of homopolymers was obviously different from that of diblock copolymers. It was verified that the band gaps of copolymers were intervenient between that of (PA) x and (PPP) y . (PA) x provided the density of states for the subbands gaps of (PPP) y and the top of valence band as well as the bottom of conduction band of copolymers,but-(PPP) y-supplied the density of states to bottom of valence band and the top of conduction band of copolymers. |
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| Keywords: | homopolymer copolymer density of states (DOS) band gap |
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