Efficient near-infrared to visible and ultraviolet upconversion in polycrystalline BiOCl:Er3+/Yb3+ synthesized at low temperature |
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| Authors: | Yongjin Li Zhiguo Song Chen Li Ronghua Wan Jianbei Qiu Zhengwen Yang Zhaoyi Yin Yong Yang Xue Wang Qi Wang |
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| Affiliation: | 1. School of Materials Science and Engineering, Kunming University of Science and Technology, Xuefu Road, Kunming 650093, China;2. Key Lab of Advanced Materials in Rare and Precious and nonferrous Metals (Kunming University of Science and Technology), Ministry of Education, Xuefu Road, Kunming 650093, China |
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| Abstract: | Er3+/Yb3+ co-doped BiOCl poly-crystals were synthesized by the conventional solid state method at 500 °C, which exhibited good crystalline and low phonon energy. Under 980 nm excitation, the samples showed intense red upconversion (UC) luminescence (Er3+: 4F9/2→4I15/2) as well as other four UC emission bands, including ultraviolet (UV) emission at 380 nm, violet emission at 411 nm, green UC emissions at 525 and 545 nm and near-infrared (NIR) emission between 800 and 850 nm, corresponding to the transitions of 4G11/2, 2H9/2, 2H11/2, 4S3/2 and 4I9/2→4I15/2 of Er3+, respectively. Interestingly, including the violet and green UC emissions, the red one originated a nearly three-photon process in this system, and a possible UC mechanism was proposed for the enhanced red emission. |
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| Keywords: | BiOCl Upconversion |
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