Journal
CRYSTENGCOMM
Volume 19, Issue 6, Pages 946-951Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ce02471h
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Funding
- National Natural Science Foundation of China (NSFC) [51302096]
- Fundamental Research Funds for the Central Universities [2015TS051]
- Innovation Foundation of Shenzhen Government [JCYJ20160429182959405]
- Fundamental Research Funds of Wuhan City [2016060101010075]
- Open Foundation of Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education [KLISEAM201504]
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A low cost and large scale synthetic approach was developed for colloidal PbS quantum dots (QDs). The heat up strategy was adapted for large scale production, thioacetamide in oleylamine (OLA) was used as the sulphur precursor for low cost and safe synthesis, and PbCl2 in OLA was used as the lead precursor for a well passivated surface. Due to the balance between the diffusion coefficient and monomer oversaturation generated by the dissolution of small particles, an optimum growth temperature exists in the new synthesis. The synthesis was easily scaled up to produce 18 g of PbS QDs from one reaction batch, with a high chemical yield of similar to 80% and the as synthesized QDs exhibit a high photoluminescence quantum yield of >40% and excellent air-stability of at least 60 days, due to the Cl- and oleate co-passivation.
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