Roles of alcohols and existing metal ions in surface chemistry and photoluminescence of InP cores

被引:8
作者
Chen, Pin-Ru [1 ]
Lai, Kuo-Yang [1 ]
Chen, Hsueh-Shih [1 ]
机构
[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Quantum Dots & Green Mat Lab, Hsinchu 30013, Taiwan
来源
MATERIALS ADVANCES | 2021年 / 2卷 / 18期
关键词
QUANTUM DOTS; HIGHLY EFFICIENT; INP/ZNS NANOCRYSTALS; OPTICAL GAIN; CDSE; OXIDATION; EMISSION; XPS; PHOSPHORUS; DEFECTS;
D O I
10.1039/d1ma00408e
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Surface oxidation and chemistry determine the optical properties of indium phosphide (InP) nanocrystals (NCs). In this study, existing metal ions from the reaction residuals and alcohols normally used in the washing process are investigated. It is found that existing metal ions and alcohols play key roles in the surface oxidation and potential surface reactions of aminophosphine-based InP NCs, which significantly affect their photoluminescence (PL), optical absorption and photo-stability. According to X-ray photoelectron spectroscopy (XPS) analysis, InP NCs after aging form InPOx oxide which could passivate the NC surface along with increased PL intensity and blue-shifted spectral peaks. Treating with the existing metal ions from reaction residuals and intentionally added alcohols (methanol or ethanol), InP NCs exhibit an enhanced PL quantum yield (QY) (similar to 25 times, from 0.1% to 2.5%), unexpected red-shifted spectral peaks and improved photo-stability (similar to 9 folds). The phenomenon is ascribed to the passivation effect of the ZnyIn1-yPOx layer formed from coupling of existing Zn2+ with the NC surface triggered by the alcohols. The alcohols are found to facilitate the surface modification of amine-capped NCs and may be utilized as agents in NC surface modifications.
引用
收藏
页码:6039 / 6048
页数:10
相关论文
共 66 条
  • [1] Surface state analysis of photobrightening in CdSe nanocrystal thin films
    Asami, H
    Abe, Y
    Ohtsu, T
    Kamiya, I
    Hara, M
    [J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (46) : 12566 - 12568
  • [2] Synthesis of Oxide-Free InP Quantum Dots: Surface Control and H2-Assisted Growth
    Baquero, Edwin A.
    Virieux, Heloise
    Swain, Robert A.
    Gillet, Angelique
    Cros-Gagneux, Arnaud
    Coppel, Yannick
    Chaudret, Bruno
    Nayral, Celine
    Delpech, Fabien
    [J]. CHEMISTRY OF MATERIALS, 2017, 29 (22) : 9623 - 9627
  • [3] Effect of ZnS shell thickness on the phonon spectra in CdSe quantum dots
    Baranov, AV
    Rakovich, YP
    Donegan, JF
    Perova, TS
    Moore, RA
    Talapin, DV
    Rogach, AL
    Masumoto, Y
    Nabiev, I
    [J]. PHYSICAL REVIEW B, 2003, 68 (16):
  • [4] Formation of high quality InP and InAs nanocrystals in a noncoordinating solvent
    Battaglia, D
    Peng, XG
    [J]. NANO LETTERS, 2002, 2 (09) : 1027 - 1030
  • [5] Solvent polarity and organic reactivity in mixed solvents: Evidence using a reactive molecular probe to assess the role of preferential solvation in aqueous alcohols
    Bentley, TW
    Ebdon, DN
    Kim, EJ
    Koo, IS
    [J]. JOURNAL OF ORGANIC CHEMISTRY, 2005, 70 (05) : 1647 - 1653
  • [6] An XPS study of oxygen bonding in zinc phosphate and zinc borophosphate glasses
    Brow, RK
    [J]. JOURNAL OF NON-CRYSTALLINE SOLIDS, 1996, 194 (03) : 267 - 273
  • [7] Mechanistic Insight and Optimization of InP Nanocrystals Synthesized with Aminophosphines
    Buffard, Aude
    Dreyfuss, Sebastien
    Nadal, Brice
    Heuclin, Hadrien
    Xu, Xiangzhen
    Patriarche, Gilles
    Mezailles, Nicolas
    Dubertret, Benoit
    [J]. CHEMISTRY OF MATERIALS, 2016, 28 (16) : 5925 - 5934
  • [8] Quantum dots luminescence enhancement due to illumination with UV/Vis light
    Carrillo-Carrion, Carolina
    Cardenas, Soledad
    Simonet, Bartolome M.
    Valcarcel, Miguel
    [J]. CHEMICAL COMMUNICATIONS, 2009, (35) : 5214 - 5226
  • [9] X-RAY PHOTOELECTRON SPECTROSCOPIC CORE-LEVEL SHIFTS OF PHOSPHORUS IN PHOSPHATES AND NATIVE OXIDE LAYERS ON INP(100) - APPLICATIONS OF THE AUGER PARAMETER CONCEPT
    CHASSE, T
    FRANKE, R
    URBAN, C
    FRANZHELD, R
    STREUBEL, P
    MEISEL, A
    [J]. JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 1993, 62 (03) : 287 - 308
  • [10] Promoting photoluminescence quantum yields of glass-stabilized CsPbX3 (X = Cl, Br, I) perovskite quantum dots through fluorine doping
    Chen, Daqin
    Liu, Yue
    Yang, Changbin
    Zhong, Jiasong
    Zhou, Su
    Chen, Jiangkun
    Huang, Hai
    [J]. NANOSCALE, 2019, 11 (37) : 17216 - 17221