Views: 0 Author: Site Editor Publish Time: 25-01-2022 Origin: Site
Photoluminescence is a quantum mechanical theory, and photoluminescent tapes are products produced using this theory. Do you know what is the photoluminescence principle? How much do you know about photoluminescent tapes? Do you know what are the applications of photoluminescent tapes?
Here is the content list:
What is photoluminescence?
How do photoluminescent bands emit light?
What are the applications of photoluminescent tapes?
Photoluminescence (PL), a type of cold luminescence, refers to the process by which a substance absorbs a photon (or electromagnetic wave) and then re-emits it. From the quantum mechanical theory, this process can be described as the process of matter absorbing photons to jump to the higher energy level of the excited state and then return to the lower energy state, while emitting photons. Photoluminescence can be divided into fluorescence and phosphorescence according to the delay time.
The fluorescent substances used today are mainly white powders of zinc or copper sulfide. They absorb a small amount of energy when illuminated by light and emit a faint fluorescence when they leave the light source, and the fluorescence is green.
People often add a very small amount of activator in the above fluorescent substances: add 1/10,000 of copper chloride and copper nitrate can enhance the brightness; add manganese chloride or silver nitrate and other substances will make photoluminescent tapes issued by different colors of light.
The most common application of photoluminescent tapes is in fluorescent lamps. It is a gas discharge within the lamp to produce ultraviolet light to excite the tube wall of the luminescent powder and issued by visible light. Its efficiency is about five times that of incandescent lamps. In addition, "black light" and other monochromatic lamps photoluminescence is widely used in printing, reproduction, medical, plant growth, insect trapping, and decoration technology. Upconversion materials convert infrared light to visible light and can be used to detect infrared light, such as the light field of infrared lasers.
Photoluminescent tapes provide information about the structure, composition, and environmental atomic arrangement of materials and are a non-destructive and sensitive method of analysis. The application of the laser makes such analysis methods deep into the micro-region, selective excitation, and transient processes in the field, so that it has further become an important research tool, applied to physics, materials science, chemistry, and molecular biology, and other fields, and gradually emerge as a new fringe discipline.
Photoluminescence is a method of probing the electronic structure of the material without contact with the material and without damaging it. Light is shone directly onto the material, where it is absorbed and excess energy is transferred to the material, a process called photoexcitation. This excess energy can be consumed in the form of luminescence. The process of emitting light due to photoexcitation is called photoluminescence. The spectral structure and light intensity of photoluminescence are a direct means of measuring many important materials.
Photoexcitation causes electrons inside the material to leap to the allowed excited state. When these electrons return to their thermal equilibrium state, the excess energy can be released by both luminescent and non-radiative processes. The energy of the photoluminescent radiated light is associated with a different energy level difference between the two electronic states, which involves a jump between the excited and equilibrium states. The amount of exciting light is linked to the contribution of the radiative process.
Through the introduction of photoluminescent tapes above, I believe you have a more comprehensive understanding of photoluminescent tapes. After knowing so much about photoluminescent tapes, then do you want to buy photoluminescent tapes? If you want to buy photoluminescent tapes, you can choose the photoluminescent tapes produced by Wenzhou Xiangying Reflective Material Science＆Technology Co., Ltd.