Optimizing the optical properties of fluorine-doped ZnO thin films deposited by sol-gel spin-coating

Title
Optimizing the optical properties of fluorine-doped ZnO thin films deposited by sol-gel spin-coating
Author(s)
Jae-Young Leem[Jae-Young Leem]김종수Hyunsik Yoon[Hyunsik Yoon]Hyonkwang Choi[Hyonkwang Choi]Sang-heon Lee[Sang-heon Lee]Jin Soo Kim[Jin Soo Kim]Jeong-Sik Son[Jeong-Sik Son]
Keywords
TEMPERATURE-DEPENDENT PHOTOLUMINESCENCE; ZINC-OXIDE; NANORODS; GA; AL
Issue Date
201408
Publisher
KOREAN PHYSICAL SOC
Citation
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.65, no.4, pp.509 - 514
Abstract
The optical properties of sol-gel spin-coated ZnO and F-doped ZnO (FZO) thin films were investigated using ultraviolet-visible and temperature-dependent photoluminescence spectroscopies. The FZO films showed on average of > 80% optical transmittance over the entire visible region, and the transmittance spectra and the optical bandgaps were blueshifted owing to the Burstein-Moss effect. The 4 at% FZO film showed the lowest Urbach energy and, thus, the best crystallinity of all the films. Changes in the free exciton, neutral-donor-bound exciton ((DX)-X-0), donor-acceptor pair, and second-order longitudinal optical phonon replica peaks were represented from the temperature-dependent photoluminescence spectra. The strength of the exciton-phonon coupling was investigated using the Bose-Einstein approximation to fit the experimental data, and the thermal activation energies of the as-deposited ZnO and 4 at% FZO thin films were determined using Arrhenius plots for the integrated PL intensities of the (DX)-X-0 peak.
URI
http://hdl.handle.net/YU.REPOSITORY/31299http://dx.doi.org/10.3938/jkps.65.509
ISSN
0374-4884
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이과대학 > 물리학과 > Articles
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