Enhanced deep-red emission from Mn⁴⁺/Mg²⁺co-doped CaGdAlO₄phosphors for plant cultivation

Abstract

Deep-red emission with a peak intensity at 712 nm is observed from the Mn4+/Mg2+ co-doped CaGdAlO4 phosphor for plant cultivation.

A review on the structural dependent optical properties and energy transfer of Mn4+ and multiple ion-codoped complex oxide phosphors

“…To meet the requirement in lighting for indoor plant cultivation, blue-violet light in wavelength range of 420-500 nm is indispensable for chlorophyll A and chlorophyll B, and red-far red light in wavelength range of 640-750 nm is indispensable for phytochrome PR and phytochrome PFR. [19][20][21][22][23][24] The fabrication of red Mn 4+ -doped phosphors in blue LED chip results in a superior performance in lighting for indoor plant cultivation due to the blue light from LED chips and red light from Mn 4+ -doped luminescence materials excited by blue light. This type of light device is a promising light source for large scale industrial application because of the energy saving and long working time of LEDs, and low cost of Mn 4+ -doped luminescence materials.…”

Engineering cation vacancies to improve the luminescence properties of Ca14Al10Zn6O35: Mn4+ phosphors for LED plant lamp

“…Unfortunately, the development of the Mn 4+ ‐doped fluoride phosphors are limited in practical application. Fluorides are unstable in a humid environment, and HF solutions used in the synthetic process are harmful to the environment and human . In contrast, the Mn 4+ ‐activated oxide phosphors have received extensive attention due to the environmentally friendly preparation procedure, high thermal stability and chemical stability .…”

“…Fluorides are unstable in a humid environment, and HF solutions used in the synthetic process are harmful to the environment and human. 19,20 In contrast, the Mn 4+ -activated oxide phosphors have received extensive attention due to the environmentally friendly preparation procedure, high thermal stability and chemical stability. 21 Ca 14 Al 10 Zn 6 O 35 : Mn 4+ phosphors with far red emission are regarded as the potential phosphors for indoor plant cultivation.…”

A single-phase white light emitting phosphor Ba3Y(PO4)3:Ce3+/Tb3+/Mn2+: luminescence, energy transfer and thermal stability

“…In recent years, white-light-emitting diodes (LEDs) have received more and more attention for their many advantages 1 Compared with traditional light sources, white LEDs have higher efficiency, higher brightness, longer service time and are more environmentally friendly, hence they are considered as the fourth generation light source. [1][2][3][4][5][6][7] The most common method to synthesize white LEDs is to combine the GaN blue LED chip with yellow phosphor YAG:Ce 3+ . However, this type of white LED has many drawbacks due to lack of a red ingredient, such as the poor color rendering index and the high correlated color temperature.…”

“…3,4,8 Because white LEDs can not only be used in lighting eld, but also in display and medical elds, hence they should show specic optical performance in different application scenarios which means that phosphors with high tunability are needed. 7,9 Nowadays, the ultraviolet-excited single-phased phosphors have been taken seriously, which can achieve white light with good color rendering index, suitable correlated color temperature and tunable emission by adjusting the doping ratio of different ions. [10][11][12][13] Therefore, it is urgent to nd novel and high performance single-phased phosphors.…”