SU631004A1 - Imaging method - Google Patents

Description

one

The invention relates to a method for obtaining images in the ultraviolet, visible and infrared regions of the spectrum and can be used in photography, holography, various areas of optoelectronics, for processing and storing information, in light flux modulators, in visual indicators and radiation integrators, as well as for quality control of semiconductor materials.

An electrically controlled method for obtaining an image in the infrared region of the spectrum by exposing and subsequently developing an electrochemical system consisting of two electrodes on which an electrical voltage is applied and between which there is an electrolyte is known. One of the electrodes is made of a photosensitive semiconductor (Si, Ge, PbS, GaAs, Ge / PbS, Si / PbS, etc.), and the second of the conductor. The electrolyte is a solution of inorganic salts (AgNOs. Pb (NO3) j, CuSO4) in water. The electrodes are polarized electrically from an external source and the images are projected onto the semiconductor electrode. After exposure, the latent image formed on the semiconductor electrode is amplified to visible physical manifestation 1 and 2. The main disadvantage of this method is the suitability of the semiconductor electrode.

The purpose of the invention is multiple image acquisition.

This is achieved by using solutions of double-quaternary nitrogen-containing salts of heterocyclic bases of formulas I-IV as the electrolyte.

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KB KI Ks-zx where R-RH is hydrogen, alksh1, aryl or aralkyl; L - - (CH-CH) p-; - (N-N) -; 0-2 X anion. The most effective salt M, 1M-proizvod. 4.4-2., 2-dipyridyl - viologens. It is known that these salts undergo a reversible one-electron reduction on the cathode with the formation of intensely oraigueous in different colors (depending on the substituent on nitrogen atoms) radical cations, which, when reversed polarization, completely and reversibly enter the original colorless or dationes. This property of viologans is used in electrochemical voltage indicators. The proposed method consists in the extraction of an electrochemical system consisting of two electrodes on which an electrical voltage is applied and between which there is an electrolyte containing a double-salt, nitrogen-containing heterogrammed base. One of the electrodes is made of a photosensitive semiconductor. Monocrystalline or polycrystalline samples of various inorganic or organic semiconductors such as ZnO ZnS can be used as semiconductors; CdS; CdSe; AgjS; PbS; TiaS; GaAs; IrtAs; Se; SiGe; polyvinylcarbazole and others. Semiconductor films prepared by chemical deposition from solutions or deposited onto a conductive organic or inorganic substrate can be used. Semiconductors with p-p heterojunctions can be used, for example Si / PbS; Ge / PbS, etc. The choice of a semiconductor is determined by the spectral region of the detected radiation. The second one is made of a conductor, which can be used as a metal or glass with an electric wire tdim ZpOz; ZnjOj et al. Electrolyte is an aqueous solution or solution in the organic solvent of a fourth salt of a nitrogen-containing heterocyclic base, as well as an inorganic salt added to increase electrical conductivity. The image is obtained on a semiconductor electrode, if the latter is polarized negatively, or on a conductive electrode during reverse polarization. To erase the image, the electrode with the image is polarized positively. If the image is on a semiconductor electrode, the latter is illuminated with actinic light. Due to the reversibility of the electrochemical system, the electrolyte is used repeatedly. After exposure, a visible image of a specific color is obtained, depending on the double-quaternary salt used. Example 1. An aqueous solution of N, N-Dyktyl-4,4-dipyridyl dichloride is placed between the electrodes, one of which is made in the form of a high-resistance monocrystalline GaAs wafer with a current supply of sputtered gold, and the second is a glass plate with a layer of Sn02 () and COP (1M). An electric voltage is applied to the electrodes (10-200 V, the same on the semiconductor). The image is projected from the side of the glass using a radiation source with a wavelength of 1.1 µm (incandescent lamp with a silicon filter). Power of incident radiation c. The wavelength range 1.1-1.4 microns is approximately 10 W / cm. When Di 50 V image is obtained on GaAs for 1 sec. The blue image is retained on the electrode for 1 hour, erased during anodic polarization of the semiconductor electrode and when illuminated with GaAs radiation with L 1.1 µm. The sensitivity of the system depends on the magnitude of the positive voltage and the concentration of the electrolyte, the age with increasing voltage and concentration. The system works in: write-erase mode at least 100 times. The system is sensitive in a wide range of wavelengths from ultraviolet to infrared radiation (L. 0.3-1.3 microns). Example 2. The method of obtaining the image is similar to the method described in Example 1, and is characterized in that an aqueous solution of N, N-dibenzyl-4,4-dipyridyl dichloride and 1 M solution is used as the electrolyte. Example 3. The method of example 1, c. The electrolyte used is aqueous

thief dichloride 1, -HEl2,2-dniridili. and W solution KCI. The image has a green color.

Example 4. Method. As in Example 1, an aqueous solution of dichloride, M, d-methyl-4,4-dipridyl ethylene (a, 3) (10C) and 1M rastrp1 KCI was used as the electrolyte.

Example 5. The method of Example 1, an aqueous solution of N, N-diethIn-2,7-phenanthrolini dichloride and III KCl solution are used as electrolyte.

Example 6. The method of Example 1, an aqueous solution of N, N-dimethyl-2,7-diazapnesh dichloride and IM KCl solution are used as the electrolyte.

Claims (5)

1. Image acquisition method by exposing the original through a transparent electrode and an electrolyte solution to a photosensitive semiconductor electrode, to which a voltage is applied, characterized in that, in order to repeatedly obtain an image, the electrolyte solution contains a double quaternary nitrogen-containing heterocyclic bases. 2. A method according to claim 1, wherein t and h so that in the quality of the electrolyte is used a solution of a two-quaternary salt of general formula 1 . Кз57 Rrtt tj xg- (a 2X cf "m -K. RW where R-Rn is hydrogen, alkyl, aryl, aralkyl; -. L - - (CH-CH) p-; - (N-N) -; p 0-2; anion. 3. Method software W1. 1 and 2, about t l and h and y -, y and with the fact that as an electrolyte a solution of a two-quaternary salt of general formula D is used. K | In rj k4 Kg Ku where R-R9 is hydrogen, aryl, alkyl, aralkyl;  anion. 4. The method according to p. 1-3, differs in that a solution of two-quaternary salt of general formula III is used as an electrolyte. K, FI, % 1 I, Tvv / hl №5-2Х Kq 1 Not where R-R9 is hydrogen, alkyl, aryl, aralkyl;  anion. 5. The method according to paragraphs. 1-4, characterized in that the electrolyte used is a solution of a double quaternary salt of general formula Re v r1 I where R-RS is hydrogen, alkyl, aryl or aralkyl;  anion; p 0-2. Sources of information taken into account in the examination 1.Gor Chev D.N., Paritsky L.G. and Rybkin S.M. FTP, 6, 1148, 1972. 2.Paritsky L. G. and Rybkin S. M., FTP, 4.764, 1970.