Stable and efficient hybrid Ag-In-S/ZnS@SiO2-carbon quantum dots nanocomposites for white light-emitting diodes

As a promising energy-saving technique, the eco-friendly and low-cost solid-state white light-emitting diodes (WLEDs) based on quantum dots (QDs) have been widely studied. Herein, a WLED device prepared by core-shell structure nanocomposites based on Ag-In-S/ZnS@SiO2 quantum dots (AIS@SiO2) and carbon quantum dots (CDs) was successfully constructed. CDs were combined onto the surface of AIS@SiO2 QDs to synthesize Ag-In-S/ZnS@SiO2-Carbon quantum dots (AIS-CDs) nanocomposites with a white-light emission, which successfully overcome the quenching effect of CDs induced by conventional aggregation. The as-prepared AIS-CDs nanocomposites presented high stability and a photoluminescence quantum yield (PLQY) of 35%. Moreover, the corresponding AIS-CDs nanocomposites-based WLEDs demonstrated the color coordinate of (0.32, 0.33), which is comparable to the pure white light (0.33, 0.33); furthermore, the luminous efficiency of the as-prepared WLEDs showed 15.1 lm W-1. These results reported herein may open up a new avenue for the development of high-performance, low-cost, and environmentally-friendly WLEDs.

Yang, Jie (författare)
Liu, Yong-fengUmeå universitet,Institutionen för fysik(Swepub:umu)yoli0007 (författare)
Zeng, Fan-ju (författare)
Tang, Xiao-Sheng (författare)
Yao, Zhi-qiang (författare)
Guan, Hong-ling (författare)
Xiong, Qian (författare)
Zhou, Jia-er (författare)
Wu, Dao-fu (författare)
Du, Juan (författare)
Umeå universitetInstitutionen för fysik (creator_code:org_t)

Av författaren/redakt...: Lin, Hao; Yang, Jie; Liu, Yong-feng; Zeng, Fan-ju; Tang, Xiao-Sheng; Yao, Zhi-qiang; visa fler...; Guan, Hong-ling; Xiong, Qian; Zhou, Jia-er; Wu, Dao-fu; Du, Juan; visa färre...

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