Long-lived and Well-resolved Mn2+ Ion Emissions in CuInS-ZnS Quantum Dots

• DOI: 10.1038/srep07510
• Publication Date: 2014-12-17T12:49:46Z
• Authors: Sheng Cao; Chengming Li; Lin Wang; Minghui Shang; Guodong Wei; Jinju Zheng; Weiyou Yang
• Keywords: Quantum yield; Visible spectrum

CuInS2 (CIS) quantum dots (QDs) have tunable photoluminescence (PL) behaviors in the visible and near infrared spectral range with markedly lower toxicity than cadmium-based counterparts, making them very promising applications light emitting solar harvesting. However, there still remain material- fabrication- related obstacles realizing high-performance CIS-based QDs well-resolved Mn2+d-d emission, long emission lifetimes as well high efficiencies. Here, we demonstrate growth of high-quality Mn2+-doped CuInS-ZnS (CIS-ZnS) based on a multi-step hot-injection strategy. The resultant exhibit PL yield (QY) up to 66% an extremely excited state lifetime ~3.78 ms, which is nearly two times longer longest one "green" ever reported. It that synthesized CIS-ZnS might open new doors for their practical bioimaging opto/electronic devices.