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Multi‐color inorganic thin‐film phosphors are deposited at room temperature on glass substrates using ultra‐wide bandgap amorphous gallium oxide (a‐GO) as a host material. All of the a‐GO films doped with four kinds of rare‐earth ions (a‐GO:REx) emit visible light, originating from the RE ions, by 238–257 nm ultraviolet light excitation; that is, blue & red emission from RE = Pr3+, red from Sm...
Transition metal (TM)‐doped amorphous gallium oxide (a‐GO:TMx) is studied as an inorganic thin‐film phosphor. Cr is selected as an emission center based on preliminary screening. The most intense red photoluminescence (PL) with a broad emission band of 620–800 nm from the a‐GO:Crx films deposited at room temperature is attained by optimizing the Cr concentration (x = 0.001) and the oxygen partial...
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