Literature DB >> 22924603

Colloidal semiconductor quantum dots with tunable surface composition.

Helen Hsiu-Ying Wei1, Christopher M Evans, Brett D Swartz, Amanda J Neukirch, Jeremy Young, Oleg V Prezhdo, Todd D Krauss.   

Abstract

Colloidal CdS quantum dots (QDs) were synthesized with tunable surface composition. Surface stoichiometry was controlled by applying reactive secondary phosphine sulfide precursors in a layer-by-layer approach. The surface composition was observed to greatly affect photoluminescence properties. Band edge emission was quenched in sulfur terminated CdS QDs and fully recovered when QDs were cadmium terminated. Calculations suggest that electronic states inside the band gap arising from surface sulfur atoms could trap charges, thus inhibiting radiative recombination and facilitating nonradiative relaxation.

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Year:  2012        PMID： 22924603     DOI： 10.1021/nl3012962

Source DB:  PubMed          Journal:  Nano Lett        ISSN： 1530-6984            Impact factor:   11.189


  13 in total

1.  Observation of trapped-hole diffusion on the surfaces of CdS nanorods.

Authors:  James K Utterback; Amanda N Grennell; Molly B Wilker; Orion M Pearce; Joel D Eaves; Gordana Dukovic
Journal:  Nat Chem       Date:  2016-07-11       Impact factor: 24.427

2.  Ligand exchange and the stoichiometry of metal chalcogenide nanocrystals: spectroscopic observation of facile metal-carboxylate displacement and binding.

Authors:  Nicholas C Anderson; Mark P Hendricks; Joshua J Choi; Jonathan S Owen
Journal:  J Am Chem Soc       Date:  2013-11-26       Impact factor: 15.419

3.  Uncovering active precursors in colloidal quantum dot synthesis.

Authors:  Leah C Frenette; Todd D Krauss
Journal:  Nat Commun       Date:  2017-12-12       Impact factor: 14.919

4.  Performance of colloidal CdS sensitized solar cells with ZnO nanorods/nanoparticles.

Authors:  Anurag Roy; Partha Pratim Das; Mukta Tathavadekar; Sumita Das; Parukuttyamma Sujatha Devi
Journal:  Beilstein J Nanotechnol       Date:  2017-01-23       Impact factor: 3.649

5.  Cell Imaging Using Two-Photon Excited CdS Fluorescent Quantum Dots Working within the Biological Window.

Authors:  Nannan Zhang; Xiao Liu; Zhongchao Wei; Haiying Liu; Jie Peng; Liya Zhou; Hongmei Li; Haihua Fan
Journal:  Nanomaterials (Basel)       Date:  2019-03-05       Impact factor: 5.076

6.  Electrophoretic Deposition of Quantum Dots and Characterisation of Composites.

Authors:  Finn Purcell-Milton; Antton Curutchet; Yurii Gun'ko
Journal:  Materials (Basel)       Date:  2019-12-07       Impact factor: 3.623

7.  Surface Traps in Colloidal Quantum Dots: A Combined Experimental and Theoretical Perspective.

Authors:  Carlo Giansante; Ivan Infante
Journal:  J Phys Chem Lett       Date:  2017-10-10       Impact factor: 6.475

8.  Efficient photocatalytic hydrogen evolution with ligand engineered all-inorganic InP and InP/ZnS colloidal quantum dots.

Authors:  Shan Yu; Xiang-Bing Fan; Xian Wang; Jingguo Li; Qian Zhang; Andong Xia; Shiqian Wei; Li-Zhu Wu; Ying Zhou; Greta R Patzke
Journal:  Nat Commun       Date:  2018-10-01       Impact factor: 14.919

9.  Finding and Fixing Traps in II-VI and III-V Colloidal Quantum Dots: The Importance of Z-Type Ligand Passivation.

Authors:  Nicholas Kirkwood; Julius O V Monchen; Ryan W Crisp; Gianluca Grimaldi; Huub A C Bergstein; Indy du Fossé; Ward van der Stam; Ivan Infante; Arjan J Houtepen
Journal:  J Am Chem Soc       Date:  2018-11-12       Impact factor: 15.419

10.  Luminescence Change of CdS and CdSe Quantum Dots on a Ag Film.

Authors:  Lian Hu; Tianning Xu; Huaxin Zhu; Chaoqun Ma; Guoqing Chen
Journal:  ACS Omega       Date:  2019-08-20
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