Effect of Solvents on Structure and Photoelectric Properties of FTO Thin Films

doi:10.11901/1005.3093.2018.421

Chinese Journal of Materials Research

2019, Vol. 33

Issue (4): 277-283 DOI: 10.11901/1005.3093.2018.421

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Effect of Solvents on Structure and Photoelectric Properties of FTO Thin Films

Chen FU,Likun WANG,Rumeng QIU,Gui WANG,Wenhao CAI,Jingkai YANG,Hongli ZHAO(

)

School of Materials Science and Engineering, Yanshan University, State Key Laboratory of Metastable Materials Science and Technology, Qinhuangdao 066004, China

Cite this article:

Chen FU,Likun WANG,Rumeng QIU,Gui WANG,Wenhao CAI,Jingkai YANG,Hongli ZHAO. Effect of Solvents on Structure and Photoelectric Properties of FTO Thin Films. Chinese Journal of Materials Research, 2019, 33(4): 277-283.

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Abstract

Transparent conductive thin films of fluorine Transparent conductive thin films of fluorine doped tin oxide (FTO) were prepared via spray-pyrolysis (SPD) process using with methanol, ethanol, isopropanol, n-butanol and deionized water as solvents respectively. The films were tested and characterized by X-ray diffraction, scanning electron microscope, four-point probe resistance meter, Hall effect meter and UV-visible spectrophotometer. The effects of solvent on the structure, morphology and photoelectric properties of FTO films were investigated. The results show that when the solvents were with different solvents, the prepared FTO thin films showed the same crystallographic, i.e. a tetrahedral rutile structure, and however their surface morphology and particle size were significantly different. Among others, the FTO thin films prepared with methanol as the solvent showed a dense and full pyramid-like structure al shape, with uniform grain size, compact structure, and the best comprehensive optical and electrical properties, namely, the best resistivity of the film can reach 4.43×10^-4 Ω·cm, the carrier concentration is 9.922×10²⁰ cm^-3, the figure of merit of the film is 1.63×10^-2 Ω^-1, and the visible light transmittance is greater than 75%.

Key words: inorganic non-metallic materials FTO thin film spray pyrolysis solvent optical properties electrical properties

Received: 02 July 2018

ZTFLH:

TB43

Fund: National Key Research and Development Program of China(2016YFB0303902);Key Basic Research Project of Hebei Province(17961109D);National Natural Science Foundation of China(51602278);Natural Science Foundation of Hebei Province(E2016203149);National Youth Talent Support Program(BJ2018004)

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	Chen FU
	Likun WANG
	Rumeng QIU
	Gui WANG
	Wenhao CAI
	Jingkai YANG
	Hongli ZHAO

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https://www.cjmr.org/EN/10.11901/1005.3093.2018.421 OR https://www.cjmr.org/EN/Y2019/V33/I4/277

Fig.1 Schematic of homemade spray pyrolysis device

Fig.2 XRD patterns (a) and (200) magnification of the diffraction peak (b) of FTO thin films prepared with different solvents

Fig.3 Texture coefficient values (a) and preferred orientation degree (b) of FTO thin films prepared with different solvens

Fig.4 SEM images of FTO thin films prepared with methanol (a), ethanol (b), isopropanol (c), n-butanol (d), deionized water (e)

Fig.5 Average particle size of FTO films prepared by different solvents

Fig.6 Effect of Solvents on Transmission of FTO Thin Films

Table1 Various parameters of FTO thin films prepared with different Solvents

Fig.7 Effect of solvents on optical band gaps of FTO thin films

Fig.8 Effect of solvents on the sheet resistance and resistivity of FTO thin films

Fig.9 Effect of solvents on carrier concentration and mobility of FTO thin films

Fig.10 Effect of solvents on grain size and average free path of FTO thin films

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