Electrostatic phenomena of ultrathin electrically insulating polyimide films: Space charge distribution and Electronic density of states at the nanometric interface

被引:0
作者
Iwamoto, M [1 ]
Itoh, E [1 ]
机构
[1] Tokyo Inst Technol, Dept Phys Elect, Meguro Ku, Tokyo 152, Japan
来源
PROCEEDINGS OF THE 6TH INTERNATIONAL CONFERENCE ON PROPERTIES AND APPLICATIONS OF DIELECTRIC MATERIALS, VOLS 1 & 2 | 2000年
关键词
polyimide; space charge; new material; electrostatic phenomena; LB film; electronic density of state; surface potential;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Nanometric electrostatic phenomena in ultrathin insulator films at the metal-film interface are described. The space charge distribution in Langmuir-Blodgett (LB) films on metal electrodes is determined on the order of nanometer film thickness scale from the surface potential method, and the distribution of electron density of states, electron acceptor and donor states, is calculated from the temperature dependence of the space charge distribution, assuming that electronic charges are displaced from metals to LB films until a thermodynamic equilibrium is established at the metal-film interface. Using three kinds of polyimide (PT) LB films deposited on various kinds of metal electrodes, surface potential of these films have been examined as a function of the number of deposited layers at a temperature between -100 degreesC and +150 degreesC. Then the space charge distribution and electronic density of states in these films were determined, and the presence of electron acceptor-states was revealed.
引用
收藏
页码:55 / 58
页数:4
相关论文
共 14 条
[1]   CHARGE GENERATION ON DIELECTRIC SURFACES [J].
DAVIES, DK .
JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1969, 2 (11) :1533-&
[2]   CHARGE-INDUCED RELAXATION IN POLYMERS [J].
DUKE, CB ;
FABISH, TJ .
PHYSICAL REVIEW LETTERS, 1976, 37 (16) :1075-1078
[3]  
FABISH TJ, 1977, J APPL PHYS, V75, P1607
[4]   CONTROL OF ELECTRICAL-PROPERTIES OF POLYMERS BY CHEMICAL MODIFICATION [J].
GIBSON, HW .
POLYMER, 1984, 25 (01) :3-27
[5]   Interfacial electrostatic phenomena and capacitance-voltage characteristics of ultrathin polyimide Langmuir-Blodgett films [J].
Itoh, E ;
Iwamoto, M .
JOURNAL OF APPLIED PHYSICS, 1999, 85 (10) :7239-7243
[6]   Electronic density of state in metal/polyimide Langmuir-Blodgett film interface and its temperature dependence [J].
Itoh, E ;
Iwamoto, M .
JOURNAL OF APPLIED PHYSICS, 1997, 81 (04) :1790-1797
[7]   SPATIAL-DISTRIBUTION OF CHARGES IN ULTRATHIN POLYIMIDE LANGMUIR-BLODGETT-FILMS [J].
IWAMOTO, M ;
FUKUDA, A ;
ITOH, E .
JOURNAL OF APPLIED PHYSICS, 1994, 75 (03) :1607-1610
[8]   Calculation of the surface potential across Langmuir-Blodgett films with polar molecules [J].
Iwamoto, M ;
Itoh, E .
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1996, 35 (6A) :3483-3487
[9]  
IWAMOTO M, 1996, POLYIMIDES LANGMUIR, pCH25
[10]  
KRUPP H, 1971, I PHYS C SER, V11, P1