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synthesis and luminescent properties of a new blue light-emitting phosphor kba2−xtm x p5o15
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نویسنده
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zhao ji ,zhao dan ,ma ming-jie ,ma zhao ,liu bao-zhong ,duan pei-gao
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منبع
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journal of the iranian chemical society - 2018 - دوره : 15 - شماره : 5 - صفحه:1069 -1074
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چکیده
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A new blue phosphor kba2−xtm x p5o15 for white light-emitting diodes (w-leds) was prepared by the high-temperature solid-state synthesis method. its structure, morphology, elementary composition, and luminescent properties were investigated. the phosphor kba1.96tm0.04p5o15 exhibits an irregular morphology with a diameter of about 10 μm. the emission spectra consisted of two emission peaks centered at 451 and 477 nm due to the 1d2 → 3f4 and 1g4 → 3h6 transitions of tm3+ activator, respectively. the optimum dopant concentration of tm3+ activator in kba2p5o15 host matrix is about 4 mol%. the critical distance is calculated to be 25 å, and the concentration quenching mechanism of tm3+ ions in kba2p5o15 was confirmed to be d–q interaction. the cie coordinates of kba1.96tm0.04p5o15 phosphor was calculated to be (0.1503, 0.0542), corresponding to blue color with a high color purity of about 92%. hence, we expect that the obtained phosphor kba2−xtm x p5o15 would be potentially used as a blue phosphor for w-leds.
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کلیدواژه
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tm3+ ,phosphor ,luminescence ,kba2p5o15 ,color purity
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آدرس
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henan polytechnic university, college of chemistry and chemical engineering, china, henan polytechnic university, college of chemistry and chemical engineering, china, henan polytechnic university, college of chemistry and chemical engineering, china, henan polytechnic university, college of chemistry and chemical engineering, china, henan polytechnic university, college of chemistry and chemical engineering, china, henan polytechnic university, college of chemistry and chemical engineering, china
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Authors
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