other conjugated and conducting polymers;
amorphous thin films;
transport measurements;
photoconductivity;
D O I:
10.1016/S0379-6779(02)00917-7
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
Charge carrier transport properties of hole-only devices based on poly(9,9-dioctylfluorene) (PFO) are investigated in terms of dark current-voltage (I-V) measurements. The built-in potential (V-bi) of the devices is determined by photovoltaic measurements. A power-law I-V relationship, I proportional to V-m (m>2), is found above the Ohmic region. Space-charge-limited current theory for exponential localized-state distributions can be applied to the interpretation of such behavior by taking account of Vbi.