Robust and Stable Ratiometric Temperature Sensor Based on Zn–In–S Quantum Dots with Intrinsic Dual‐Dopant Ion Emissions

• DOI: 10.1002/adfm.201603201
• Publication Date: 2016-09-13T12:08:38Z
• Authors: Sheng Cao; Jinju Zheng; Jialong Zhao; Zuobao Yang; Minghui Shang; Chengming Li; Weiyou Yang; Xiaosheng Fang
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

Dual emission quantum dots (QDs) have attracted considerable interest as a novel phosphor for constructing ratiometric optical thermometry because of its self‐referencing capability. In this work, the exploration codoped Zn–In–S QDs with dual emissions at ≈512 and ≈612 nm from intrinsic Cu Mn dopants temperature sensing is reported. It found that dopant can be tailored by adjusting Mn‐to‐Cu concentration ratios, enabling in tunable manner. The energy difference between conduction band host states considered key occurrence ion emission. as‐constructed QD sensor exhibits totally robust stability fluctuation ≈ I / tot versus times lower than 1% almost no hysteresis cycles over broad window 100–320 K. This discovery represents present cadmium‐free, dual‐emitting open new door synthesis stable emissions, which poise them well challenging applications nanothermometry.