Showing papers on "Organic semiconductor published in 1970"
TL;DR: Experiments using organic semiconductors as catalysts are interesting for several reasons, including how the parameters of the catalyst can be altered by altering the molecules forming the lattice.
Abstract: EXPERIMENTS using organic semiconductors as catalysts are interesting for several reasons. Organic semiconductors have a molecular lattice and the parameters of the catalyst can therefore be altered by altering the molecules forming the lattice. Organic chemistry techniques also enable single molecules to be synthesized in a tailor made fashion.
5 citations
10 Dec 1970
TL;DR: In this paper, the photovoltaic effect and related processes in tetracene have been investigated and experiments were made to measure the following: (1) photovolastic i-v curve, the efficiency of tetracenes is found to be about 0.0000007, the polarization and the hysteresis due to an application of external field are observed, and the decay of the polarization takes in the order of seconds to minutes, and (4) the spectral dependence of the current, especially the anomalous behavior of the polarity reversal of current.
Abstract: : The photovoltaic effect and related processes in tetracene have been investigated. Experiments were made to measure the following: (1) photovoltaic i-v curve, the efficiency of tetracene is found to be about 0.0000007, (2) the polarization and the hysteresis due to an application of external field are observed, (3) the decay of the polarization takes in the order of seconds to minutes, and (4) the spectral dependence of the photovoltaic current, especially the anomalous behavior of the polarity reversal of the current. Theoretical work was to study the kinetics of decay of the charges and the polarization, and the polarity reversal of the photovoltaic current. This work implies the experimental observations are quite universal among organic semiconductors, and are not confined to tetracene. (Author)
3 citations
01 Jan 1970
TL;DR: The first step in the study of the mechanism of conduction in organic semiconductors is generally the determination of n and µ appearing in the expression for conductivity σ = enµ as mentioned in this paper.
Abstract: A large number of investigations has been devoted to the mechanism of conduction in organic semiconductors.The first step in the study of the mechanism of conduction is generally the determination of n and µ appearing in the expression for conductivity σ = enµ. In inorganic semiconductors, this is done by measuring the Hall effect. Then, by studying the dependence of µ and n on the temperature and other parameters, the mechanism of conduction in the material investigated is deduced.
2 citations
01 Jan 1970
TL;DR: In this article, several polymers have been synthesized which are stable at high temperatures and possess very diverse electrical and magnetic properties, and their catalytic activity in heterogeneous catalysis has been studied for the cases of the decomposition of hydrogen peroxide and formic acid.
Abstract: At the present time, numerous polymers have been synthesized which are stable at high temperatures and possess very diverse electrical and magnetic properties Their catalytic activity in heterogeneous catalysis has been studied for the cases of the decomposition of hydrogen peroxide [1] and formic acid [2, 3], de-hydrogenation and dehydration reactions [3, 5, 6], and the decomposition of hydrazine and nitric oxide [6, 8]
1 citations
01 Jan 1970
TL;DR: In the field of chemistry and physics, the most important problems of present-day chemistry are the creation of new substances and materials possessing a series of valuable properties, such as conjugated bonds or the formation of charge transfer complexes as mentioned in this paper.
Abstract: One of the most important problems of present-day chemistry is the creation of new substances and materials possessing a series of valuable properties. Particularly great prospects have been opened up in the synthesis and study of organic compounds possessing delocalized electrons because of the presence in them of conjugated bonds or the formation of charge-transfer complexes. Such compounds have acquired the name of organic semiconductors. Starting in 1960, the volume of investigations on the chemistry and physics of these materials has risen to such an extent that the possibility has appeared of generalizing some basic achievements in this field [1, 2]. At the present time organic semiconductors include both low-molecular-weight compounds and polymers with a large number of conjugated bonds, charge-transfer complexes in which, owing to a definite structure, conditions are created for the delocalization of an electron, stable free radicals, and also some biopolymers (including proteins) the conductivity of which can be explained by a nonionic mechanism.
01 Jan 1970
TL;DR: In this paper, a study of the spectral characteristics and photoelectric sensitivity of many organic polymers with conjugated double bonds has been made, but no sufficiently well-founded theory of the mechanism of the photoexcitation of the current carriers and their transfer in the polymeric structure has been established.
Abstract: A study has been made of the spectral characteristics and photoelectric sensitivity of many organic polymers with conjugated double bonds. In spite of the considerable number of papers devoted to photoelectric sensitivity, so far there has been no sufficiently well-founded theory of the mechanism of the photoexcitation of the current carriers and their transfer in the polymeric structure. Nevertheless, the characteristics of the photoconductivity of several polymers with conjugated bonds give grounds for considering these polymers as promising materials for practical use.
01 Jan 1970
TL;DR: In this paper, the characteristics of organic semiconducting materials that can be used in various branches of power engineering and radio-electronics have been considered, such as power engineering, power control, and communication.
Abstract: At the present time, hundreds of new organic semiconducting materials have been obtained [1–3]. In this chapter we shall consider those characteristics of these materials that can be used in various branches of power engineering and radioelectronics [4].
01 Jan 1970
TL;DR: The surface properties of organic semiconductors are extremely important both for understanding the processes taking place at the boundary of separation of two phases and for more complete understanding of the process taking place in the bulk of the semiconductor as discussed by the authors.
Abstract: There is no doubt that the surface properties of organic semiconductors are extremely important both for understanding the processes taking place at the boundary of separation of two phases and for more complete understanding of the processes taking place in the bulk of the semiconductor. The influence of the state of the surface and the processes taking place at the surface on the bulk properties is particularly strong when the semiconductors have a low intrinsic conductivity [1]. In the adsorption of gases on the surface of a semiconductor it has been found experimentally that some molecules are capable of increasing the concentration of electrons in the surface layer and others of decreasing it. The process of adsorption may be considered in two ways: either as a creation of donor (acceptor) impurities at the surface [2, 3] or as the formation of charge-transfer complexes [4].