Polaronic Tunnelling in Organic Triblock Copolymers

作     者：刘德胜 张大成 解士杰 梅良模 

作者机构：SchoolofPhysicsandMicroelectronicsShandongUniversityJinan250100//DepartmentofPhysicsJiningNormalUniversityJining272025//NationalKeyLaboratoryofCrystalMaterialsShandongUniversityJinan250100 SchoolofPhysicsandMicroelectronicsShandongUniversityJinan250100//NationalKeyLaboratoryofCrystalMaterialsShandongUniversityJinan250100 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2005年第22卷第1期

页      面：178-181页

核心收录：

学科分类：07[理学] 070203[理学-原子与分子物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：国家自然科学基金 山东省自然科学基金 

主　　题：ELECTRONIC-STRUCTURE CONJUGATED POLYMERS BAND-GAP ELECTROLUMINESCENCE POLYACETYLENE OLIGOMERS STATES oligomers Electronic structure Electric fields Organic polymers Electrochemiluminescence Band gap Electroluminescence polarons Segments Countries (nations) Tunneling Polyacetylenes Copolymers Nylons 

摘      要：Polaron tunnelling is studied in xPA/nPPP/xPA (PA for polyacetylene and PPP poly (p-phenylene)) triblock copolymer, which has a well-barrier-well structure. An extended tight-binding Hamiltonian including external electric held is adopted. Without electric field, the injected electrons would not extend over the whole copolymer chain but instead be confined in the segments of PA. This is different from the behaviour of the traditional semiconductors. It is found that the polaron can transfer to the potential barrier-PPP segment when the applied electric field reaches a certain value. The critical polaron tunnelling electric fields depend upon the lengths of PPP segments.