Synthesis of novel Eu2+ activated K3Ca2(SO4)3F down-conversion phosphor for near UV excited white light emitting diode

Color-tunable luminescence, energy transfer behavior and I–V characteristics of Dy3+,Eu3+ co-doped La(PO4) phosphors for WLEDs and solar applications

“…From eqn (11), it is calculated that solar cell efficiency is enhanced around 17.34% and 12.76%, after coating the surface of a Si-solar cell with the sample and exposing to direct sunlight or a solar simulator, respectively.…”

“…10,11 However, this approach has several drawbacks such as a poor rendering index (CRI o 80), has a high color correlated temperature (CCT 4 4500 K) and absence of red color. 10,11 This problem may be solved using NUV excited multi color phosphors. In this regard, it is important to develop a single-phase phosphor for multicolor emission UV/NUV WLEDs.…”

“…8,9 Currently, the blue LED chip-coated yellow phosphor is used in commercial white LEDs, which is known as cerium doped yttrium aluminum garnet (YAG:Ce 3+ ) phosphor. 10,11 However, this approach has several drawbacks such as a poor rendering index (CRI o 80), has a high color correlated temperature (CCT 4 4500 K) and absence of red color. 10,11 This problem may be solved using NUV excited multi color phosphors.…”

Novel red colour emitting Ca0.995Mg2(SO4)3:0.5Eu2+ phosphor under ultraviolet, blue, and green excitation for plant growth LEDs

“…In the current scenario, phosphor-converted light-emitting diodes (pc-LEDs) have attracted much attention from researchers and scientists especially in the field of artificial solid-state lighting due to their amazing features such as long operational lifetime, high luminescence efficiency, low energy consumption, cost-effectiveness, compact size, etc.. [1][2][3][4] pc-LEDs are the latest and future generation lighting technology, they have been used for various applications such as lighting, displays, lasers, solar cells, sensors, bioimaging, fingerprint detection, phototherapy, and plant growth, etc. [5][6][7][8][9][10][11][12][13][14] In pc-LEDs, different types of phosphors can be used to adjust the spectra structure, so that the integrated spectrum overlaps with absorption bands of multiple colours.…”

“…In the past few years, phosphate-, sulphate-, molybdate-, tungstate-, vanadate-, nitride-, oxide-, and sulphide-based rare earth-activated phosphors have been investigated for development of WLEDs. [4,8,11,[32][33][34][35][36] Sulphate-based luminescent materials are important hosts because of their marked benefits such as good thermal stability, sufficient chemical strength, and efficient luminescence; their broad emission bands greatly limit the maximum achievable luminous efficacies of high-quality warm WLEDs and potential applications. [12,37] The luminescence properties of inorganic phosphors depend on rare earth ions or metal ions.…”