Mr. Hengfei Shi Profile

Hengfei Shi

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Proceedings Article | 7 August 2023 Paper

Stable and homogeneous SnO2 nanoparticles enabled by organic tin precursor

Wenchen Ma, Zhenwei Ren, Hengfei Shi, Chengzhao Luo, Wenlin Xia, Zhishuai Zheng, Jie Li, Yu Chen

Proceedings Volume 12781, 1278135 (2023) https://doi.org/10.1117/12.2687102

KEYWORDS: Nanoparticles, Tin, X-ray photoelectron spectroscopy, Sol gels, Quantum dot light emitters, Particles, Fabrication

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SnO₂ nanoparticles (NPs) have emerged as promising electron transport materials for quantum dot light-emitting diodes (QLEDs), but usually encountering poor solution stability against the compatibility of the device fabrication process. In this work, we have successfully synthesized uniformly sized and distributed SnO₂(o-SnO₂) NPs by employing tin 2-ethyl hexanoate (an organotin compound) precursor with the sol-gel method. The obtained o-SnO₂ NPs have superior stability over the conventional SnO₂ (c-SnO₂) NPs synthesized by a hydrothermal method. In detail, the o-SnO₂ NPs can be stably dispersed in ethanol without further addition of dispersant and remain transparent even stored in air for several weeks. Furthermore, the o-SnO₂ NPs have been adopted to achieve high-quality electron transport layers (ETLs) with smooth and dense films, which showed a roughness of 1.9 nm, much smaller than 6.53 nm of the c-SnO₂ films, showing a competitive candidate for efficient ETLs toward high-performance QLEDs.

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