Effect of annealing temperature on nano-crystalline TiO2 for solar cell applications

被引：26
作者：
Malevu, T. D. [1 ]
Mwankemwa, B. S. [2 ,3 ]
Motloung, S., V [4 ]
Tshabalala, K. G. [5 ]
Ocaya, R. O. [5 ]
机构：
[1] Univ KwaZulu Natal, Sch Chem & Phys, Westville Campus,Private Bag X54001, ZA-4000 Durban, South Africa
[2] Univ Pretoria, Dept Phys, P Bag X20, Hatfield, South Africa
[3] Univ Dodoma, Coll Nat & Math Sci, Sch Phys Sci, Dept Phys, POB 338, Dodoma, Tanzania
[4] NMMU, Dept Phys, POB 77000, ZA-6031 Port Elizabeth, South Africa
[5] Univ Free State, Dept Phys, P Bag X13, ZA-9866 Phuthaditjhaba, South Africa
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2019年 / 106卷
基金：
新加坡国家研究基金会;
关键词：
Anatase TiO2 nanocrystals; Annealing temperature; Phase transformation; Hydrothermal crystal growth; EXPOSED; 001; FACETS; ANATASE; NANOSHEETS;
D O I：
10.1016/j.physe.2018.10.028
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
This study investigates the effect of annealing temperature (AT) on structure, morphology and optical properties of hydrothermally synthesized TiO2 nanocrystals. Selected-Area Diffraction (SAED) confirmed high quality monocrystals. XRD and Raman spectroscopy indicate only anatase and rutile phases. At high temperature, the (101) and (001) are preferred. PL emission peaks appear at 407, 416 and 493 nm, which can be attributed to photo-excited electron-hole pairs, band-edge excitons and oxygen vacancy defects, respectively. UV-Vis spectroscopy indicates that AT over the 200-600 degrees C temperature range causes the band gap to decrease from 3.08 eV to 2.73 eV. Hydrothermal synthesis followed by annealing at 600 degrees C is found to be a good route for high-purity, nanocrystalline anatase-phase TiO2 with the preferred {001} orientation that is thought to enhance solar cell performance.
引用
收藏
页码：127 / 132
页数：6
相关论文
共 50 条
  • [41] Ultrafast and low temperature laser annealing for crystalline TiO2 nanostructures patterned by electro-hydrodynamic lithography
    Cha, SeungNam
    Lee, Suok
    Jang, Jae Eun
    Jang, Arang
    Hong, Jin Pyo
    Lee, Jaejong
    Sohn, Jung Inn
    Kang, Dae Joon
    Kim, Jong Min
    APPLIED PHYSICS LETTERS, 2013, 103 (05)
  • [42] Annealing temperature effect on the properties of mercury-doped TiO2 films prepared by sol-gel dip-coating technique
    Mechiakh, R.
    Ben Sedrine, N.
    Karyaoui, M.
    Chtourou, R.
    APPLIED SURFACE SCIENCE, 2011, 257 (13) : 5529 - 5534
  • [43] Room temperature synthesis of highly crystalline TiO2 nanoparticles
    Ghamsari, M. Sasani
    Radiman, S.
    Hamid, M. Azmi Abdul
    Mahshid, S.
    Rahmani, Sh.
    MATERIALS LETTERS, 2013, 92 : 287 - 290
  • [44] The Effects of Annealing Temperature Dependence on the Doping of Titanium Dioxide (TiO2) and Reduced Graphene Oxide (rGO) for Perovskite Solar Cell Application
    Kemat, Rafidah
    Sahari, Siti Kudnie
    Baharin, Afiqah
    INTERNATIONAL JOURNAL OF NANOELECTRONICS AND MATERIALS, 2020, 13 (03): : 421 - 431
  • [45] Annealing Temperature Effects of TiO2 Nanofiber Anodes for the Rechargeable Lithium Ion Batteries
    Guan Gui-Qing
    Zou Ming-Zhong
    Lin Jian-Ping
    Yan Gui-Yang
    CHINESE JOURNAL OF STRUCTURAL CHEMISTRY, 2017, 36 (05) : 729 - 737
  • [46] Low-temperature atomic layer deposition of TiO2 activated by laser annealing: Applications in photocatalysis
    Zimbone, Massimo
    Cantarella, Maria
    Sfuncia, Gianfranco
    Nicotra, Giuseppe
    Privitera, Vittorio
    Napolitani, Enrico
    Impellizzeri, Giuliana
    APPLIED SURFACE SCIENCE, 2022, 596
  • [47] Effect of Annealing Temperature on TiO2 Nanorod Films Prepared by dc Reactive Magnetron Sputtering for Dye-Sensitized Solar Cells
    Meng, Lijian
    Li, Can
    dos Santos, M. P.
    JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS, 2011, 21 (04) : 770 - 776
  • [48] Electron Diffusion Length in Nano-Porous TiO2 Electrode Directly Measured Using Partially Dye-Adsorbed Solar Cell and Effects of Electrolyte Solvent and Annealing Temperature
    Gonda, Tomohiro
    Nada, Masahiro
    Sano, Tatsuji
    Kobayashi, Naoki
    E-JOURNAL OF SURFACE SCIENCE AND NANOTECHNOLOGY, 2009, 7 : 61 - 64
  • [49] Effect of Annealing Temperature on Photoelectric Characteristics of TiO2/CdSe Nanosheet Heterojunction Thin Films
    Zhu Liu-Dong
    Wu Jun-Wei
    Xue Jin-Bo
    Qian Kai
    Hu Lan-Qing
    CHINESE JOURNAL OF INORGANIC CHEMISTRY, 2017, 33 (08) : 1457 - 1464
  • [50] Effect of Both Sn Doping and Annealing Temperature on the Properties of Dip-Coated Nanostructured TiO2 Thin Films
    Beldjebli, Ouidad
    Bensaha, Rabah
    Panneerselvam, Pratheep
    JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS, 2022, 32 (05) : 1624 - 1636
12345