Color converters for white LEDs using liquid phase epitaxy growth method

The development of innovative high-power lighting sources is urgently required to design and investigate the new high structural quality and high-temperature stable converters in the form of single crystals and single crystalline films. This research deals with the growth and investigation of structural, luminescence, and photoconversion properties (color coordinates, color temperature and color rendering index) of the single crystalline films of Ce3+ doped (Lu, Y, Tb, Gd)3Al5O12 garnets, grown using the Liquid Phase Epitaxy method onto undoped Y3Al5O12 substrates. The combination of Ce3+ doped Lu3Al5O12, Y3Al5O12, Tb3Al5O12, Gd2.9Lu0.1Al5O12 film converter with respective thickness with commercial blue LED allows for obtaining green-yellow-orange-emitting pc-WLEDs. The application of the mentioned film converters results in the formation of four basic trends on the color diagram depending on the thickness of the converter. •TThe study addresses the urgent demand for high-power lighting by investigating single crystalline film converters with superior structural and thermal properties.•The LPE technique is employed to grow garnet films on undoped YAG substrates.•The research analyzes the structural, luminescent, and photoconversion properties of (Lu, Y, Tb, Gd)AG:Ce films.•By combining converters and blue LEDs, the study successfully produces pc-WLEDs with green, yellow, and orange tints.•By varying converter thickness, the researchers reveal four distinct color trends on the diagram.