Persons

The radioisotope power sources based on the principle of the tritium beta-radiation power conversion sequentially into light and electric energy have been investigated. The spectral characteristics of used radio luminescent light sources, the spectral and electric characteristics of semiconductor photo converters have been analyzed. The experimental nuclear battery cells have been developed, based on which the battery with the short circuit current values U = 2.5V and I=1.2 µA at no-load voltage, respectively, has been assembled. The battery can be used as a power source for used household electronic devices with low power consumption.

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The possibility of evaluating the quality of heterojunction LEDs by the level of the threshold current (glow current start) has been considered. The block diagram of the setup operation of measuring the LEDs threshold current has been presented. The principle of the setup operation is to specify the linearly increasing current through the LED by the precision source, to measure the signal proportional to the LED optical radiation power by the highly sensitive photodetector based on the high-speed photodiode and low-noise transimpedance amplifier and to compute the value of the threshold current in the Mathcad program. The results of the sample measurements of the threshold current of various types of LEDs, illustrating a wide variation of parameters of the sampling distribution of LEDs by the level of the threshold current, have been presented.

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