利用光热电效应收集近红外光能的二硫化钼和热释电高分子纳米复合物（英文）

Photo-Thermoelectric Generation in MoS2/Pyroelectric Polymer Nanocomposites for Collection of Near-Infrared Light Energy

设计合成了一种基于二硫化钼(MoS2)/热释电聚合物的柔性薄膜光热电纳米发电机(PTENG)。过渡金属硫族化合物作为薄层纳米薄片,可以捕获近红外(NIR)光,并将其转化为热能。同时,热释电聚合物将无机纳米片所收集的热能转化为电能。在近红外辐照下,PTENG可以瞬间产生电压和光电流,且输出长期保持在较高水平。通过光热效应与热释电效应的有效耦合,该体系具有较高的热电转换系数。我们还通过理论模拟分析了MoS2在聚合物纳米复合材料中的作用。MoS2的存在显著提高了热释电聚合物薄膜的温度变化率,提高了器件的光电响应。

We design a photo-thermoelectric nanogenerator(PTENG)based on a flexible film of molybdenum disulfide(MoS2)dispersed in a pyroelectric polymer.The transition-metal dichalcogenide as thin-layered nanosheets can harvest the incident near-infrared(NIR)light and convert it into thermal energy.The pyroelectric polymer subsequently transduced the thermal energy collected by the inorganic nanosheets into electric energy.Under NIR irradiation,the PTENG can generate voltage and photocurrent instantly,and the output kept at high level for a long time.High thermoelectric conversion coefficient was obtained,which arised from efficient coupling between photothermal and pyroelectric effects.Theoretical simulation distinguished the contribution of MoS2 in the polymer nanocomposite.MoS2 significantly increased the temperature change rate in pyroelectric polymer films,leading to enhanced photoelectric response in the device.