Journal
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
Volume 10, Issue 10, Pages -Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2162-8777/ac305b
Keywords
Luminescence; Sensors; LED; light emitting diode; UiO-66-(OH)2; Carbon dots
Funding
- National Key Research and Development Program of China [SQ2020YFF0413357]
- Hubei Provincial Key Laboratory of Economic Forest Germplasm Improvement and Resources Comprehensive Utilization, Hubei Collaborative Innovation Center for the Characteristic Resources Exploitation of Dabie Mountains, Huanggang Normal University, Huanggang [202020504]
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Carbon dots (CDs) are widely used in LED diodes, sensing, and bioimaging. However, the fluorescence property of CDs is limited by solid-state aggregation-caused quenching (ACQ). Metal-organic frameworks (MOFs), particularly Zr-MOFs (UiO-66-(OH)(2)), have been considered as suitable hosts to encapsulate CDs to overcome ACQ. By constructing a dual-emitting CDs@MOFs system, the research successfully achieved blue-emitting CDs@UiO-66-(OH)(2) and found that the fluorescence of CDs@UiO-66-(OH)(2) changes with the volume of CDs, eventually leading to fluorescence quenching. The correlated color temperatures of CDs@UiO-66-(OH)(2) were also observed to shift from cold light to warm light, which has potential applications in various fields such as electroluminescent diodes, ion-sensors, environmental monitoring, and biological imaging.
Carbon dots (CDs) has been widely applied in LED diodes, sensing and bioimaging. However, the fluorescence property of CDs is limited because of the solid-state aggregation-caused quenching (ACQ). Metal-organic frameworks (MOFs), due to their high surface area, porosity and tunable pore size, are considered suitable hosts to inhibit the ACQ of CDs. Herein, the Zr-MOFs (UiO-66-(OH)(2)) is chosen as a host to encapsulate CDs. The dual-emitting CDs@MOFs system is constructed, which overcomes the problem of solid-state aggregation-caused quenching of carbon dots to gain the blue-emitting CDs@UiO-66-(OH)(2). With the volume of CDs increased, the fluorescence of CDs@UiO-66-(OH)(2) has changed simultaneously. When the volume reaches 3 ml, CDs@UiO-66-(OH)(2) begin to cause fluorescence quenching. The correlated color temperatures (CCT) of CDs@UiO-66-(OH)(2) are transformed from cold light to warm light. That can be further researched in electroluminescent diodes, ion-sensor, environmental monitoring, biological imaging and developments in other related biochemical fields.
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