Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 7, Issue 7, Pages 3083-3089Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta09891c
Keywords
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Funding
- Swiss National Science Foundation [IZLCZ2_170276/1]
- Sino-Swiss Science and Technology Cooperation project
- Swiss National Science Foundation (SNF) [IZLCZ2_170276] Funding Source: Swiss National Science Foundation (SNF)
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Low-temperature crystallization is desired for achieving solution processable transparent conductive oxide (TCO) layers. Here we demonstrate a low-temperature crystallization of tin doped indium oxide (ITO) layers by taking preformed indium-tin hydroxide nanoparticles as the precursor and applying surface modification with ethanolamine on the as-prepared layers. Surface modification with ethanolamine is shown to speed up the dehydration of the hydroxide precursor, resulting in earlier onset of crystallization into the cubic bixbyite ITO phase with a larger crystal size. The ethanolamine-modified ITO nanoparticle layer possesses fewer surface hydroxyl groups as compared to the non-treated layer, corresponding to a higher charge carrier concentration, as manifested in a near IR absorption. The nanoparticle ITO layer shows dc conductivity two times higher than that of the non-treated layer. A conductivity of 43 S cm(-1) combined with a high optical transmittance of above 90% in the 380-1100 nm wavelength range is obtained for the nanoparticle ITO layer annealed at 300 degrees C.
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