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Solution processed thermoelectric materials for large area applications

适用于大面积应用的溶液加工热电材料

基本信息

批准号：
1815896
负责人：
金额：
--
依托单位：
Swansea University
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2016
资助国家：
英国
起止时间：
2016 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-1815896
关键词：
Solution processed thermoelectric materials large

项目摘要

It is estimated that around one sixth of industrial energy usage is wasted as heat. In order to maximize energy efficiency, the waste heat represent a viable resource to reduce overall electricity demand, helping to mitigate CO2 emissions associated with the waste heat. One strategy for using waste heat would be to generate electrical energy with the use of Thermoelectric generators (TEGs). TEGs are devices, which generate an electrical current driven by a difference in temperatures. TEGs consist of a hot side and a cold side and the difference in temperature between the two sides results in a potential difference (voltage) and current flow, and therefore the generation of electrical power. Until recently, thermoelectric materials capable of producing efficient TEGs at room temperatures, have been based on alloys of rare-Earth elements such as bismuth and tellurium which have draw- backs such as high cost of production, scarcity, and toxicity. Very recent research has seen the emergence of organic thermoelectric materials which have advantages over inorganic materials, in that they are low cost, light weight and can be processed from solution at low temperatures, meaning they are less energy intensive to produce. This also means that manufacturing technologies such as printing produce organic TEGs over large areas, further reducing costs, but also leading to the possibility of flexible, building-integrated, or even wearable thermoelectric devices.This project seeks to investigate the thermoelectric properties of potential candidate organic and polymer materials, to investigate improvements in materials' properties gained via process improvements, doping of pure materials, and the fabrication of organic/inorganic nanocomposites. It will also look at novel inorganic materials capable of being processed from solution such as intermetallics and perovskite-structured materials. The primary objective of the project is to identify materials that are capable of being printed from solution in order to fabricate efficient TEGs on flexible substrates. Once suitable materials have been identified, processing conditions will be optimized and thermoelectric devices will be built and tested. We will also fabricate flexible TEG/photovoltaic tandem devices with the aim of harvesting waste heat from the PV devices under test conditions to generate electrical power photovoltaically and thermoelectrically in the same device.

据估计，大约六分之一的工业能源使用被浪费为热量。为了最大限度地提高能源效率，余热是减少总体电力需求的一种可行资源，有助于减少与余热相关的二氧化碳排放。利用余热的一种策略是利用热电发电机(TEG)产生电能。TIG是一种由温差驱动产生电流的装置。TGS由热端和冷端组成，两端的温差会产生电势差(电压)和电流，从而产生电能。直到最近，能够在室温下产生高效TIG的热电材料一直是基于铋和碲等稀土元素的合金，这些元素具有生产成本高、稀缺性和毒性等缺点。最近的研究发现了有机热电材料的出现，这种材料比无机材料具有优势，因为它们成本低，重量轻，可以在低温下从溶液中加工，这意味着它们的生产能耗较低。这也意味着，印刷等制造技术可以大面积生产有机TEG，进一步降低成本，但也导致了柔性、建筑一体化甚至可穿戴的热电设备的可能性。本项目旨在研究潜在的候选有机和聚合物材料的热电性能，并通过工艺改进、纯材料掺杂和有机/无机纳米复合材料的制备来研究材料性能的改善。它还将着眼于能够从溶液中加工的新型无机材料，如金属间化合物和钙钛矿结构材料。该项目的主要目标是确定能够从溶液中打印的材料，以便在柔性基板上制造高效的TEG。一旦确定了合适的材料，将优化工艺条件，并建造和测试热电设备。我们还将制造灵活的三甘醇/光伏串联器件，目的是在测试条件下收集光伏器件的废热，以便在同一器件中以光伏和热电方式发电。