Abstract: The present invention relates to a phosphine precursor for the preparation of a quantum dot, and a quantum dot prepared therefrom. Using the phosphine precursor for the preparation of a quantum dot of the present invention, a quantum dot with improved luminous efficiency and higher luminous color purity can be provided.

Abstract: An auto pairing system and method for a Bluetooth network is provided through a wired or wireless coupling. The method for pairing two devices of a short range wireless communication network includes configuring, at each device, a wired and wireless auto pairing of the devices; determining whether the devices are physically coupled with each other; and performing pairing between the devices if the devices are physically coupled. The auto pairing system and method for Bluetooth devices of the present invention enables Bluetooth devices to automatically perform an on-going pairing process through a wired connection or wirelessly in close proximity without a user involvement, thereby improving user convenience.