AN INVESTIGATION ON IMPURITY AND GRAIN BOUNDARY EFFECTS ON STRUCTURAL, OPTICAL AND ELECTRICAL PROPERTIES OF SnO2:F THIN FILMS DEPOSITED BY SPRAY PYROLYSIS

被引：6
|
作者：
Eshghi, Hosein [1 ]
Biaram, Alireza [1 ]
Adelifard, Mehdi [1 ]
机构：
[1] Shahrood Univ Technol, Dept Phys, Shahrood 31636155, Iran
来源：
MODERN PHYSICS LETTERS B | 2011年 / 25卷 / 17期
关键词：
Tin oxide; fluorine doped; spray pyrolysis; optical absorption; electronic transport; TRANSPARENT CONDUCTORS; AMORPHOUS-SILICON; ABSORPTION EDGE; FLUORINE; PRECURSOR; CONSTANTS;
D O I：
10.1142/S0217984911026395
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have investigated the effect of fluorine dopant concentration (0-15 F/Sn wt.%) on structural, optical and electrical properties of SnO2 thin films grown by spray pyrolysis technique. According to the experimental evidences and data analysis, we found in these samples: (1) the polycrystalline layers, while in undoped conditions it mainly grow along (211) direction in doped ones (200) is the preferred direction with a direct band gap energy of about 3.7-3.9 eV; (2) The main cause for the relatively high absorption coefficients below E-g could be due to the presence of wide (similar to 1-2 eV) band tails in the forbidden gap; (3) the highest (5.4 x 10(-3) Omega(-1)) figure of merit belongs to the sample with 5 wt.% F/Sn concentration; (4) the grain boundary scattering is the main limiting mechanism in the electrical transport properties of the layers.
引用
收藏
页码：1473 / 1485
页数：13
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