PhotoluminescencePhotoluminescence is light emission from matter after absorbing photons. It is a form of luminescence initiated by , where photons excite electrons to a higher energy level in an atom. After excitation, various mechanisms release the absorbed energy as new photons. Time between absorption and emission varies, ranging from femtoseconds for free-carrier plasma in inorganic semiconductors or metals to milliseconds for phosphorescence.
FluorescenceFluorescence is one of two kinds of photoluminescence, the emission of light by a substance that has absorbed light or other electromagnetic radiation. When exposed to ultraviolet radiation, many substances will glow (fluoresce) with colored visible light. The color of the light emitted depends on the chemical composition of the substance. Fluorescent materials generally cease to glow nearly immediately when the radiation source stops.Persistent luminescenceCommonly referred to as phosphorescence, persistent luminescence is the emission of light by a phosphorescent material after an by ultraviolet or visible light. MechanismThe mechanism underlying this phenomenon is not fully understood. It is neither fluorescence nor phosphorescence. In fluorescence, the lifetime of the excited state lasts a few nanoseconds.
Triplet stateIn quantum mechanics, a triplet state, or spin triplet, is the quantum state of an object such as an electron, atom, or molecule, having a quantum spinS = 1. It has three allowed values of the spin's projection along a given axis mS = −1, 0, or +1, giving the name "triplet". Spin, in the context of quantum mechanics, is not a mechanical rotation but a more abstract concept that characterizes a particle's intrinsic angular momentum.
PhotonA photon (from Ancient Greek, (phôs, phōtós)'light') is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force. Photons are massless particles that can only move at one speed, the speed of light measured in a vacuum. The photon belongs to the class of boson particles.
Radioactive decayEmissions from unstable atomic nucleiRadioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration) is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha, beta, and gamma decay.
Henri BecquerelAntoine Henri Becquerel (15 December 1852 – 25 August 1908) was a French experimental physicist who shared the 1903 Nobel Prize in Physics with Marie and Pierre Curie for his discovery of radioactivity. Education and careerAntoine Henri Becquerel was born on 15 December 1852 in Paris. His grandfather, Antoine César Becquerel, father, Edmond Becquerel, and later his son, Jean Becquerel, were all notable physicists.
Singlet stateIn quantum mechanics, a singlet state usually refers to a system in which all electrons are paired. The term "singlet" originally meant a linked set of particles whose net angular momentum is zero, that is, whose overall spin quantum number s = 0 {\displaystyle s=0} . As a result, there is only one spectral line of a singlet state.
Zinc sulfideZinc sulfide is an inorganic compound with the chemical formula of ZnS. This is the main form of zinc found in nature, where it mainly occurs as the mineral sphalerite. Although this mineral is usually black because of various impurities, the pure material is white, and it is widely used as a pigment. In its dense synthetic form, zinc sulfide can be transparent, and it is used as a window for visible optics and infrared optics.
Ancient GreekAncient Greek (Ἑλληνική, Hellēnikḗ [hellɛːnikɛ̌ː]) includes the forms of the Greek language used in ancient Greece and the ancient world from around 1500 BC to 300 BC. It is often roughly divided into the following periods: Mycenaean Greek (c. 1400 – c. 1200 BC), Dark Ages (c. 1200 – c. 800 BC), the Archaic or Homeric period (c. 800 – c. 500 BC), and the Classical period (c. 500 – c. 300 BC).
BlacklightA blacklight, also called a UV-A light, Wood's lamp, or ultraviolet light, is a lamp that emits long-wave (UV-A) ultraviolet light and very little visible light. One type of lamp has a violet filter material, either on the bulb or in a separate glass filter in the lamp housing, which blocks most visible light and allows through UV, so the lamp has a dim violet glow when operating.
Marie CurieMaria Salomea Skłodowska Curie (née Skłodowska; 7 November 1867 – 4 July 1934), better known as Marie Curie, was a Polish and naturalised-French physicist and chemist. She shared the 1903 Nobel Prize in Physics with her husband, Pierre Curie, "for their joint researches on the radioactivity phenomena discovered by Professor Henri Becquerel".phosphorescenceRelated word or term.glowingRelated word or term.*As an Amazon Associate I earn from qualifying purchases.