Volume 58, Issue 51 pp. 18443-18448
Communication

Carbon Dots in a Matrix: Energy-Transfer-Enhanced Room-Temperature Red Phosphorescence

Bolun Wang

Bolun Wang

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012 P. R. China

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Yue Yu

Yue Yu

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012 P. R. China

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Hongyue Zhang

Hongyue Zhang

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012 P. R. China

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Yuzhi Xuan

Yuzhi Xuan

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012 P. R. China

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Guangrui Chen

Guangrui Chen

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012 P. R. China

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Wenyan Ma

Wenyan Ma

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012 P. R. China

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Prof. Jiyang Li

Corresponding Author

Prof. Jiyang Li

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012 P. R. China

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Prof. Jihong Yu

Corresponding Author

Prof. Jihong Yu

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012 P. R. China

International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun, 130012 P. R. China

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First published: 09 October 2019
Citations: 150

Graphical Abstract

Connecting the dots: Energy transfer (ET) from carbon dots embedded in crystalline Mn-containing open-framework matrices results in high-efficiency red room-temperature phosphorescence (RTP) emissions. Varying the carbon dot precursors and the heteroatom coordination geometries enables the emissions to be tuned from red to green/yellow.

Abstract

High-efficiency red room-temperature phosphorescence (RTP) emissions have been achieved by embedding carbon dots (CDs) in crystalline Mn-containing open-framework matrices. The rationale of this strategy relies on two factors: 1) the carbon source, which affects the triplet energy levels of the resulting CDs and thus the spectral overlap and 2) the coordination geometry of the Mn atoms in the crystalline frameworks, which determines the crystal-field splitting and thus the emission spectra. Embedding the carbon dots into a matrix with 6-coordinate Mn centers resulted in a strong red RTP with a phosphorescence efficiency of up to 9.6 %, which is higher than that of most reported red RTP materials. The composite material has an ultrahigh optical stability in the presence of strong oxidants, various organic solvents, and strong ultraviolet radiation. A green-yellow RTP composite was also prepared by using a matrix with 4-coordinate Mn centers and different carbon precursors.

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