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671 results on '"Postnikov, V. A."'

51. Dedicated to the memory of V.D. Aleksandrov Effect of annealing in an inert atmosphere on the electrical properties of crystalline pentacene films

Author

null Postnikov V. A., null Givargizov M. E., null Kulishov A. A., and null Yurasik G. A.

Abstract

The results of a study of the effect of annealing at 150^oC in an inert atmosphere (Ar + 5% H2) on the electrical properties of organic field-effect transistors based on pentacene are presented. Crystalline pentacene films with a thickness of 95±5 nm were obtained using thermal vacuum deposition. The transfer and output characteristics of field-effect transistors before and after annealing for 15 hours are investigated. It was found that as a result of heat treatment, the hole mobility in the saturation regime increased by an average of 30%, and the threshold voltage decreased approximately two times. According to the data of atomic force microscopy, annealing led to a more than twofold decrease in the surface roughness of pentacene films, as well as to a noticeable enlargement of grains, which led to a decrease in the concentration of traps for hole electric transport in the channel of the field-effect transistor. Keywords: pentacene, vacuum thermal deposition, crystalline films, organic field-effect transistors, hole mobility, annealing in an inert atmosphere.

Published
2022

73. Effect of Si diffusion on growth of GeSi self-assembled islands

Author

Novikov, A. V., primary, Vostokov, N. V., additional, Gusev, S. A., additional, Drozdov, Yu. N., additional, Krasil’nik, Z. F., additional, Lobanov, D. N., additional, Moldavskaya, L. D., additional, Miura, M., additional, Postnikov, V. V., additional, Stepikhova, M. V., additional, Shiraki, Y., additional, and Usami, N., additional

Published
2001
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97. Scaling behaviour of relaxation dependencies in metaloxide superconductors

Author

Sidorenko, A. S, Panaitov, G. I, Gabovich, A. M, Moiseev, D. P, and Postnikov, V. M

Subjects
Solid-State Physics
Abstract

Superconducting glass state has been investigated in different types of metaloxide ceramics, Y-Ba-Cu-O, Bi-Sr-Ca-Cu-O, Ba-Pb-Bi-O, using the highly sensitive SQUID magnetometer. The analysis of long-time relaxation processes of thermoremanent magnetization m(sup trm) (+) = M(sub o) - Slnt displayed scaling dependence of the decay rate S = -dM/dlnt on quantity of trapped magnetic flux M(sub o): 1gs = 31g M(sub o) - observed universal dependence S is approximately M(sup 3) (sub o) seems to one of the features of superconducting glass state in metaloxide ceramics.

Published
1990

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