Department of Mechanical and Aerospace Engineering, Rutgers University, Piscataway, New Jersey, 08854, USA.
Department of Chemical Engineering, Oregon State University, Corvallis, Oregon, 97331, USA.
Sci Rep. 2018 Feb 2;8(1):2201. doi: 10.1038/s41598-018-20621-9.
Intense Pulsed Light sintering (IPL) uses pulsed, visible light to sinter nanoparticles (NPs) into films used in functional devices. While IPL of chalcogenide NPs is demonstrated, there is limited work on prediction of crystalline phase of the film and the impact of optical properties of the substrate. Here we characterize and model the evolution of film temperature and crystalline phase during IPL of chalcogenide copper sulfide NP films on glass. Recrystallization of the film to crystalline covellite and digenite phases occurs at 126 °C and 155 °C respectively within 2-7 seconds. Post-IPL films exhibit p-type behavior, lower resistivity (~10-10 Ω-cm), similar visible transmission and lower near-infrared transmission as compared to the as-deposited film. A thermal model is experimentally validated, and extended by combining it with a thermodynamic approach for crystal phase prediction and via incorporating the influence of film transmittivity and optical properties of the substrate on heating during IPL. The model is used to show the need to a-priori control IPL parameters to concurrently account for both the thermal and optical properties of the film and substrate in order to obtain a desired crystalline phase during IPL of such thin films on paper and polycarbonate substrates.
强脉冲光烧结（IPL）使用脉冲可见光将纳米颗粒（NPs）烧结成用于功能器件的薄膜。虽然已经证明了硫属化物 NPs 的 IPL，但对于预测薄膜的晶体相和基底光学性质的影响的研究还很有限。在这里，我们对玻璃上的硫属化物铜硫化物 NP 薄膜的 IPL 过程中的膜温度和晶体相演化进行了表征和建模。在 2-7 秒内，膜分别在 126°C 和 155°C 下重结晶为晶型的铜蓝和 digenite 相。与沉积后的薄膜相比，后 IPL 薄膜表现出 p 型行为，电阻率更低（~10-10 Ω-cm），可见光透射率相似，近红外透射率更低。通过实验验证了热模型，并通过将其与晶体相预测的热力学方法相结合，以及通过考虑薄膜透光率和基底光学性质对 IPL 过程中的加热的影响，对其进行了扩展。该模型用于表明需要预先控制 IPL 参数，以同时考虑薄膜和基底的热和光学性质，以便在纸张和聚碳酸酯基底上对这种薄膜进行 IPL 时获得所需的晶体相。
