外围缩合四个1,10-啡啰啉单元的新氮杂酞菁的表面光伏响应及电场作用研究  

Surface Photovoltaic Response and Electric-field Action of a New aza H_2Pc Containing Four 1,10-Phenanthroline Subunits

作　　者：侯小珂[1] 杜锡光[2] 马春雨[3] 李燕[2] 张清林[4] 王旭[1] 常玉春[1] 姜文海[1] 单士军[1] 姜秀英[1] 杜国同[1] 

机构地区：[1]吉林大学电子科学与工程学院集成光电子学国家重点实验室,长春130012 [2]东北师范大学化学学院,长春130021 [3]大连理工大学物理系,大连116024 [4]吉林大学化学学院,长春130021

出　　处：《高等学校化学学报》2005年第7期1294-1297,M006,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:60307002)资助

摘　　要：通过电场诱导表面光电压谱确定外围缩合4个1,10-啡啉单元的氮杂酞菁为p型有机半导体,并对各个谱带进行合理的归属.结果发现,Soret带长波侧光电压曲线在电场作用下轻微蓝移,根据电场对高极化度n轨道基态的影响,将其归属为n-π*跃迁.这一结果表明,光电属性与材料的分子结构和电子结构密切相关,为设计有机半导体模型提供了进一步的实验数据.In this paper an aza H_2Pc containing four 1,10-phenanthroline subunits was presented and its photoluminescence and photovoltage properties were investigated. For the same kind of electronic transition(π-π~* transition), the photoluminescence and photovoltage exhibit competitive mechanism. Interestingly, the Soret-band SPV response is stronger than that of Q-band due to the four peripheral subunits. Based on the electric-field-induced surface photovoltage spectroscopy, the conduction type of the expanded aza H_2Pc was judged to be p-type. This contribution from the peripheral electron-withdrawing subunits comes with decreasing the electron-filling energy and facilitating the molecular oxidation. From the similar behavior, the Q-band and short wavelength side of Soret-band were assigned to π-π~* transition. Another intriguing aspect is that the long wavelength side of Soret-band exhibits a slight blue shift in the external electric field. According to the influence of electric field on the ground state of n-orbital with a high polarizability, it was assigned to n-π~* transition. The results indicate that the optoelectronic properties closely related to the molecular structure and the electronic structure, which provide further experimental data for developing an organic semiconductor model.

关 键 词：1 10-啡啰啉 氮杂酞菁 表面光伏响应 电场作用 有机半导体 光荧光 光电压 外围缩合 

分 类 号：O625.67[理学—有机化学] TN304.5[理学—化学]