Dual light emitting material, and security method using the same

A method of fabricating a dual-light-emitting material, the method comprising:

• a step (S100) of preparing a first solution where an organic ligand and an insert body are dissolved;
• a step (S200) of forming a porous framework containing the insert body by mixing a metal ion solution with the first solution;
• a step (S300) of forming the dual-light-emitting material by mixing a nanocrystal precursor solution with a suspension including the porous framework containing the insert body;
• wherein the organic ligand is configured to emit a room-temperature organic phosphorescence (RT-OP) and the nanocrystal is configured to emit fluorescence.

A two-dimensional security method using a fluorescent-phosphorescent dual-light-emitting material, the method comprising:

• an encryption process comprising
• attaching a masking tape to a substrate,
• exposing an area for an encryption information to be printed on by patterning the masking tape,
• printing on the exposed area the encryption information where a real information is combined with a fake information by printing the real information in a ink mixed by the fluorescent-phosphorescent dual-light-emitting material as well as by printing the fake information associated with the real information in a ink mixed with a fluorescent material, and
• removing the masking tape;
• and
• a decryption process comprising
• emitting the fluorescence by radiating ultraviolet rays to the encryption information for a predetermined time, and
• displaying the real information through the phosphorescence of the real information when a luminescence of fake information stops after an irradiation of the ultraviolet rays stops.

A dual-light-emitting encryption cube having a three-dimensional encryption pattern by dual luminescence of fluorescence and phosphorescence, the encryption cube comprising:

• eight vertices of a cube;
• and
• twelve cube branches connecting the eight vertices,
• wherein an information branch of the encryption cube included in the three-dimensional encryption pattern is composed of a fluorescent-phosphorescent filament, and a camouflage branch of the encryption cube not included in the three-dimensional encryption pattern is composed of a fluorescent filament according to a predetermined three-dimensional encryption pattern, and
• wherein the information branch and the camouflage branch are disposed in any one of six external branches forming a cube centered on the vertices and six internal branches connecting the vertices to each contact point of the six external branches.

A method of fabricating a dual-light emitting encryption cube capable of dual luminescence of fluorescence and phosphorescence, the method comprising:

• a step of mixing a fluorescent light-emitting material with a polymer solvent to form a fluorescent solution, and mixing a fluorescent-phosphorescent dual-light-emitting material with a polymer solvent to form a fluorescent-phosphorescent solution, and respectively filling the fluorescent solution and the fluorescent-phosphorescent solution into an engraved pattern of a separately patterned mold;
• a step of drying the fluorescent solution and the fluorescent-phosphorescent solution filled in the mold at a room temperature to form a fluorescent filament and a fluorescent-phosphorescent filament respectively;
• a step of cutting the fluorescent filament and the fluorescent-phosphorescent filament as much as a predetermined cube branch length of the encryption cube;
• and
• a step of assembling an information branch of the encryption cube included in a three-dimensional encryption pattern with the fluorescent-phosphorescent filament and assembling a camouflage branch of the encryption cube not included in the three-dimensional encryption pattern with the fluorescent filament according to a predetermined three-dimensional encryption pattern.

A three-dimensional security method using a dual-light-emitting encryption cube that is three-dimensionally patterned with a fluorescent light-emitting material and a fluorescent-phosphorescent dual-light-emitting material, wherein

• the encryption cube is generated as a patterned encryption cube by assembling a cube branch using a fluorescent-phosphorescent dual-light-emitting material with respect to an information branch of the encryption cube forming a three-dimensional encryption pattern and by assembling the cube branch using a fluorescent light-emitting material with respect to a camouflage branch of the encryption cube not included in the three-dimensional encryption pattern according to a predetermined three-dimensional encryption pattern, the three-dimensional security method comprising:
• a process of an encryption setting for setting a user's password according to a three-dimensional encryption pattern set between a user terminal and a security device;
• a process of inputting the user password at the user terminal, the process comprising:
• a step of arranging the information branch and the camouflage branch in a correct position centered on a vertex according to each encryption pattern of the patterned encryption cube while arranging sequentially the encryption cube corresponding to the user password among the pre-patterned encryption cubes,
• a step of radiating ultraviolet rays to the encryption cubes arranged sequentially according to the user password during a predetermined time,
• a step of photographing the encryption cubes arranged sequentially according to the encryption information after stopping a irradiation of a ultraviolet ray,
• a step of generating a password input information by binarizing the information branch and the camouflage branch of each photographed encryption cube, and
• a step of transmitting the generated password input information to the security device;
• and
• a process of decrypting the input user password in the security device, the process comprising:
• a step of sequentially generating the three-dimensional encryption pattern of the encryption cube on the basis of the binary information of the user password transmitted from the user terminal,
• a step of calculating a matching rate by comparing the pattern of the user password registered in the encryption setting process with the generated three-dimensional encryption pattern of the encryption cube, and
• a step of releasing security and providing information as a matching success when the matching rate is more than a predetermined value or transmitting a matching failure notification as a matching failure when the matching rate is less than the predetermined value.