期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 2, 期 46, 页码 10031-10036出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4tc01768d
关键词
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资金
- National Basic Research Program of China [2013CB328804]
- Beijing Higher Education Young Elite Teacher Project [YETP1231]
- Open Research Fund of State Key Laboratory of Bioelectronics Southeast University
Transparent films incorporated with quantum dots are promising light conversion materials for many cutting-edge technologies including light-emitting diodes and luminescent solar concentrators. In this work, we demonstrated that a combination of water soluble quantum dots and ultrathin cellulose nanofibers is an advantageous strategy to fabricate highly emissive thin films of tens of micrometers. By varying the composition of quantum dots, these thin films exhibit tunable photoluminescence emissions, ranging from blue to red as well as white light. Because of the inherent nanoscale phase separation of cellulose nanofibers, the loading content of quantum dots can be increased up to 50 wt%, which results in a significant increase of the refractive index. The combination of high refractive index (similar to 1.56), colour-tunable emissions (450-650 nm) and high transparency (similar to 80%, at a wavelength longer than the absorption band of quantum dots) makes them promising candidates for photonic and optoelectronic devices.
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