TITLE

Fermi-level band filling and band-gap renormalization in Ga-doped ZnO

AUTHOR(S)
Ye, J. D.; Gu, S. L.; Zhu, S. M.; Liu, S. M.; Zheng, Y. D.; Zhang, R.; Shi, Y.
PUB. DATE
May 2005
SOURCE
Applied Physics Letters;5/9/2005, Vol. 86 Issue 19, p192111
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The fundamental optical properties of Ga-doped ZnO films grown by metalorganic chemical vapor deposition were investigated by room-temperature transmittance and photoluminescence (PL) spectroscopy. The Burstein–Moss (BM) shift of the absorption edge energy is observed at the carrier concentration up to 2.47×1019 cm-3. The absorption edges are fitted to a comprehensive model based on the electronic energy-band structure near critical points plus relevant discrete and continuum excitonic effects, taking account of the Fermi-level filling factor. The theoretical calculation for BM effect is in good agreement with the experimental facts, considering the nonparabolic nature of conduction-band and band-gap renormalization (BGR) effects. Meanwhile, the monotonic redshift of the near-band-gap emission detected by PL measurements has also been observed with increasing free-carrier concentration, which is attributed to the BGR effects, and can be fitted by an n1/3 power law with a BGR coefficient of 1.3×10-5 meV cm.
ACCESSION #
17164748

 

Related Articles

  • Photoconductivity Spectra of Bulk ZnO. Röder, U.; Klarer, D.; Sauer, R.; Thonke, K. // AIP Conference Proceedings;2005, Vol. 772 Issue 1, p179 

    State-of-the-art bulk ZnO samples grown by chemical vapor technique show at low temperatures in the infrared region photoconductivity peaks at 33 meV and 42 meV. We correlate these peaks with donors observed in low-temperature photoluminescence spectra recorded from the same samples. A further...

  • Photoluminescence properties of ZnO nanoneedles grown by metal organic chemical vapor deposition. Lin, Shisheng; Ye, Zhizhen; He, Haiping; Zhao, Binghui; Zhu, Liping; Huang, Jingyun // Journal of Applied Physics;Sep2008, Vol. 104 Issue 6, p064311 

    The authors report on growth of ZnO nanoneedles (NNs) by metal organic chemical vapor deposition (MOCVD). Photoluminescence spectra of the NNs at 20 K are dominated by a surface excitonic (SX) emission at 3.367 eV. Temperature-dependent PL reveals the activation energies for the quenching of SX...

  • Identification of about 100-meV acceptor level in ZnO nanostructures by photoluminescence. Liu, Chao; He, Haiping; Sun, Luwei; Xu, Zheng; Ye, Zhizhen // Applied Physics A: Materials Science & Processing;Aug2011, Vol. 104 Issue 2, p695 

    ZnO nanorod arrays and nanowires were grown by hydrothermal and vapor phase deposition methods, respectively. At low temperature, the photoluminescence (PL) spectra of both samples are dominated by a broad peak around 3.34 eV. Combined with excitation density-dependent PL spectra and surface...

  • Similarities and distinctions of defect production by fast electron and proton irradiation: Moderately doped silicon and silicon carbide of n-type. Emtsev, V.; Ivanov, A.; Kozlovski, V.; Lebedev, A.; Oganesyan, G.; Strokan, N.; Wagner, G. // Semiconductors;Apr2012, Vol. 46 Issue 4, p456 

    Effects of irradiation with 0.9 MeV electrons as well as 8 and 15 MeV protons on moderately doped n-Si grown by the floating zone (FZ) technique and n-SiC (4 H) grown by chemical vapor deposition are studied in a comparative way. It has been established that the dominant radiation-produced...

  • Ga-doped ZnO single-crystal nanotips grown on fused silica by metalorganic chemical vapor deposition. Zhong, J.; Muthukumar, S.; Chen, Y.; Lu, Y.; Ng, H.M.; Jiang, W.; Garfunkel, F.L. // Applied Physics Letters;10/20/2003, Vol. 83 Issue 16, p3401 

    In situ Ga-doped ZnO nanotips were grown on amorphous fused silica substrates using metalorganic chemical vapor deposition. Structural, optical, and electrical properties of as-grown ZnO nanotips are investigated. Despite the amorphous nature of fused silica substrates, Ga-doped ZnO nanotips are...

  • ZnO nanowires with high aspect ratios grown by metalorganic chemical vapor deposition using gold nanoparticles. Sang-Woo Kim; Shizuo Fujita; Shigeo Fujita // Applied Physics Letters;4/11/2005, Vol. 86 Issue 15, p153119 

    ZnO nanowires with diameters ranging from 20 to 60 nm and lengths in the range 5–15 μm were synthesized by metalorganic chemical vapor deposition, assisted by colloidal gold nanoparticles with a diameter of 20 nm dispersed on SiO2/Si substrates. The ZnO nanowires were found to have a...

  • Conformable coating of SiO2 on hydrothermally grown ZnO nanorods. Chu, B. H.; Leu, L. C.; Chang, C. Y.; Lugo, F.; Norton, D.; Lele, T.; Keselowsky, B.; Pearton, S. J.; Ren, F. // Applied Physics Letters;12/8/2008, Vol. 93 Issue 23, p233111 

    Coating silicon dioxide on hydrothermally grown ZnO nanorods is demonstrated using a low temperature plasma enhanced chemical vapor deposition (PECVD) system. Wurtzite structured ZnO nanorods were prepared by spin coating ZnO nanocrystals onto plastics or glass substrates. Then, the nanorods...

  • ZnO nanorods grown on ZnSe particles by the chemical vapor deposition method. Guo, C.; Choy, W. C. H.; Leung, Y. P.; Cheah, K. W.; Fang, Y. // Applied Physics A: Materials Science & Processing;Jun2006, Vol. 83 Issue 3, p421 

    A novel structure of ZnO nanorods on microsized ZnSe particles has been prepared through a chemical vapor deposition technique using Zn and Se powders as the sources. The dimension of the nanorods can be controlled by adjusting the growth temperature, time and the Zn : Se ratio. Through the...

  • Donor/acceptor doping and electrical tailoring in ZnO quantum dots. Ye, Z. Z.; Zeng, Y. J.; Lu, Y. F.; Lin, S. S.; Sun, L.; Zhu, L. P.; Zhao, B. H. // Applied Physics Letters;9/10/2007, Vol. 91 Issue 11, p112110 

    The authors report on donor/acceptor doping in ZnO quantum dots (QDs) grown by a metal-organic chemical vapor deposition method. The Ga donor and N acceptor, as identified by x-ray photoelectron spectroscopy (XPS), are introduced into ZnO QDs. They demonstrate, with a combination of valence band...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics