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Air-Stable PbSe Nanocrystals Passivated by Phosphonic Acids.
Woo, Ju Young; Lee, Sooho; Lee, Seokwon; Kim, Whi Dong; Lee, Kangha; Kim, Kyungnam; An, Hye Jin; Lee, Doh C; Jeong, Sohee.
Afiliação
  • Woo JY; Nanomechanical Systems Research Division, Korea Institute of Machinery and Materials (KIMM) , Daejeon 305-343, Korea.
  • Lee S; Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST Institute for the Nanocentury, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 305-338, Korea.
  • Lee S; Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST Institute for the Nanocentury, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 305-338, Korea.
  • Kim WD; Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST Institute for the Nanocentury, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 305-338, Korea.
  • Lee K; Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST Institute for the Nanocentury, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 305-338, Korea.
  • Kim K; Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST Institute for the Nanocentury, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 305-338, Korea.
  • An HJ; Nanomechanical Systems Research Division, Korea Institute of Machinery and Materials (KIMM) , Daejeon 305-343, Korea.
  • Lee DC; Nanomechanical Systems Research Division, Korea Institute of Machinery and Materials (KIMM) , Daejeon 305-343, Korea.
  • Jeong S; Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST Institute for the Nanocentury, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 305-338, Korea.
J Am Chem Soc ; 138(3): 876-83, 2016 Jan 27.
Article em En | MEDLINE | ID: mdl-26713516
We developed a new chemical strategy to enhance the stability of lead selenide nanocrystals (PbSe NCs) against oxidation through the surface passivation by P-O- moieties. In the synthesis of PbSe NCs, tris(diethylamino)phosphine (TDP) selenide (Se) was used as a Se precursor, and the resulting PbSe NCs withstood long-term air exposure while showing nearly no sign of oxidation. Nuclear magnetic resonance (NMR) spectroscopy reveals that TDP derivatives passivate the surface of PbSe NC. Through a series of ligand cleavage reactions, we found that the TDP derivatives are bound on NC surface through the P-O- moiety. Based on such understanding, it turned out that direct addition of various PAs during the synthesis of PbSe NCs also results in the NCs whose absorption spectrum remains nearly intact after air exposure for weeks. The P-O- moieties render the NCs stable in the operation of field effect transistors, suggesting that our findings can enable the use of air stable PbSe NCs in wider array of optoelectronic applications.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2016 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2016 Tipo de documento: Article