A novel, high (ca. 185 ¡C) material for hole-transporting layers has been synthesized. Combination with a T g 1,2,4-triazole derivative yields an e †ective blue light-emitting device.

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Three new chelate zinc complexes with azomethine groups characterized by luminescence in the visible spectral region were synthesized: bis(N (2 oxybenzylidene)cyclohexylamine)zinc, bis(N (2 oxybenzylidene) 4 tert butylaniline)zinc, and N,N´ bis(oxybenzylidene) 1,2 phe nylenediaminezinc. Their spectral properties were studied. Based on these complexes, we prepared electroluminescence devices giving an intense emission in the blue, green, and red spectral regions.

The kinetics of photoelectrochemical hydrogen evolution at p-St single crystals m acidic aqueous soluliolls of electrolytes under pulse photoexciration was studied. Despite a low stability oF the silicon surface under the experimental conditions, a distract interrelation between the characteristic time of interlhcial charge transi~:r and stationary current was tbund. The determination of the characteristic transfer time does not need the detailed elaboration of generation-recombination processes in the semiconductor. The steady-state current density was shov, n to be determined both for the dark current and photocurrent by the. surface charge density.

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