中国物理B ›› 2008, Vol. 17 ›› Issue (6): 2251-2256.doi: 10.1088/1674-1056/17/6/052
陈兆甲1, 彭海琳2, 刘忠范2, 龙云泽3
Long Yun-Ze(龙云泽)a)†, Chen Zhao-Jia(陈兆甲)b), Peng Hai-Lin(彭海琳)c), and Liu Zhong-Fan(刘忠范)c)
摘要: This paper reports that a charge-transfer salt dibutylammonium bis-7,7,8,8-tetracyanoquinodimethane [DBA (TCNQ)2] has been prepared. The temperature dependences of the DC electrical conductivity of the DBA (TCNQ)2 single crystal measured along the crystallographic a, b, and c axes are reported. The crystal shows semiconducting behaviour and the room-temperature conductivities are highly anisotropic (\sigmaa = 3.63\times 10-4S/cm, \sigmab= 2.84$\times 10-6S/cm, and \sigmac = 1.82\times 10-5S/cm). Particularly, a sharp semiconductor to semiconductor transition has been observed around 270 K on the resistivity curves measured under cooling and heating. In addition, thermal hysteresis phenomena on conductivity and differential scanning calorimetry curves are also reported.
中图分类号: (Charge carriers: generation, recombination, lifetime, and trapping)