Core shell nanometer crystal of gold and copper-indium-diselenide and preparation method of core shell nanometer crystal

Abstract

The invention provides a core shell nanometer crystal of gold and copper-indium-diselenide and a preparation method of the core shell nanometer crystal, and relates to a core shell nanometer material. The core shell nanometer crystal of the gold and copper-indium-diselenide is in a core shell structure, wherein a core is a gold nano particle and a shell layer is a copper-indium-diselenide CuISe2 shell layer. The preparation method comprises the following steps of: mixing triphenylphosphine gold chloride with oleyl amine; heating and vacuumizing; introducing nitrogen gas and raising the temperature to react to obtain an oleyl amine solution of colloid nano gold; adding selenium powder into the oleyl amine; heating and vacuumizing; introducing the nitrogen gas and raising the temperature toreact to obtain the oleyl amine solution of the selenium; adding cuprous chloride and indium chloride into an oleyl amine solvent; heating and vacuumizing; introducing the nitrogen gas and raising the temperature to react to obtain an oleyl amine compound of a copper salt and an indium salt; injecting the oleyl amine solution of the colloid nano gold into the oleyl amine solution of the selenium;keeping heating and agitating to obtain a turbid solution; injecting the turbid solution into the oleyl amine compound of the copper salt and the indium salt; keeping heating to react and centrifuging; and washing sediment with trichloromethane and ethanol at least once to obtain the core shell nanometer crystal of the gold and copper-indium-diselenide.

Description

technical field [0001] The present invention relates to a kind of core-shell nano material, particularly relate to a kind of core-shell nano crystal of gold and copper indium selenium (recorded as AuCuInSe 2 ) and its preparation method. Background technique [0002] Energy is the basis for the survival and development of human society, and it is imperative to solve the current energy crisis. As the most potential renewable energy source, solar energy has received extensive attention all over the world. In the effective application of solar energy, the fastest growing and most dynamic field is photoelectric conversion, so the research and development of solar cells is particularly attractive. CuInSe 2 Ternary semiconductor compounds have become one of the most potential materials in the research of thin-film solar cells due to their suitable band gap, high light absorption coefficient and superior photostability. At present, due to the harsh conditions and high cost of t...

AI Technical Summary

Problems solved by technology

Another literature reports that the area is ~3cm 2 The conversion efficiency of the thin film battery is only 0.2% (Panthani, M.G.; Akhavan, V.; Goodfellow, B.; Schmidtke, J.P.; Dunn, L.; Dodabalapur, A.; Barbara, P.F.; Korgel, B.A. Journal of the American Chemical Society 2008, 130, 16770.)

In addition to the need to improve the manufacturing process, one of the key reasons is that there are too many interfaces in the nanocrystalline photovoltaic layer, which leads to a low collection rate of photogenerated carriers.

Images