【摘要】 在紧束缚模型哈密顿的基础上 ,研究了由聚乙炔 (polyacetylene,简写为PA)和聚对苯撑 (poly(p phenylene) ,简写为PPP)组成的准一维多嵌段共聚物的光吸收性质 ,发现沿链方向外加电场的作用 ,使得体系的带隙变小 ,电子光吸收出现红移。更多还原

【Abstract】 The optical propeties of the quasi-one-dimensional multiblock copolymers(…-(PPP)_x-(PA)_y-…) is studied in the framework of the tight-binding model. It is found that the electric fields which along the chain can lead the bandgaps of copolymers to be narrow. As a result, the electronic absorption changed to red shift.更多还原