Microwave-assisted synthesis of indium tin oxide nanocrystals in polyol media and transparent, conductive layers thereof

作者：Hammarberg Elin; Prodi Schwab Anna; Feldmann Claus^*

来源：Thin Solid Films, 2008, 516(21): 7437-7442.

DOI：10.1016/j.tsf.2008.02.048

• indium tin oxide
• nanostructures
• polyol
• thin films
• transparent conductive oxide
• colloid

Aiming at a facile and low-cost liquid phase synthesis of indium tin oxide (ITO), a microwave-assisted preparation in high-boiling, multidentate alcohols (so-called polyols) is evaluated. While heating for 2 h at 200 degrees C and ambient pressure, transparent ITO suspensions are obtained exhibiting a bright blue color. According to dynamic light scattering, scanning electron microscopy, transmission electron microscopy, Xray diffraction and Brunauer-Emmett-Teller analysis, as-prepared particles turn out to be single crystalline with an average diameter of 17 nm and a near monodisperse size distribution. Four-point probing of powder pellets reveals a low resistivity (1.1 x 10(-2) Omega cm) of as-prepared In2O3:Sn (5 mol.%). Fourier-transform infrared spectra show a reflectivity in the infrared close to 100%. As a proof of concept, thin layers are deposited on glass plates using a simple solvent evaporation technique. After a certain post-treatment, these layers exhibit a visible transmittance similar to the uncoated glass substrate and a low resistivity (1.2 x 10(-2) Omega cm).

• 出版日期2008-9-1