X-ray absorption and neutron spectroscopies of novel conducting thermoelectric MOFs

在这个项目中，学生将研究分子掺杂、组成和拓扑在多个长度尺度上对导电金属有机骨架(MOF)的影响，作为热电应用的候选材料。它们的模块化特性允许优化骨架组成、功能和孔径大小，这对能源和可持续发展的应用至关重要。我们最近成功地制备了具有前所未有的热电性能的导电MOF。此外，还观察到电导率从n型向p型的转变。兴奋剂的确切机制或确定哪些物种对观察到的兴奋剂负有确切责任尚不清楚。为了揭示这一机制，我们建议结合使用表征技术(XAS/XES和非弹性中子散射(INS))，这将使我们能够在测量热电性能的同时进行详细的Operando气体吸附研究。

In this project the student will investigate the effects of molecular doping, composition and topology on multiple length scales in conducting Metal Organic Frameworks (MOFs) as candidates for thermoelectric applications. Their modular nature allows framework composition, functionality and pore size to be optimised which is paramount for applications in energy and sustainability. We have recently succeeded in preparing conducting MOFs with unprecedented thermoelectric performance. Furthermore, a switch in conductivity from n-to p-type was observed. The exact mechanism of doping or identification of which species is exactly responsible for the observed doping is unknown. To unravel this mechanism we propose to use a combination of characterization techniques (XAS/XES and inelastic neutron scattering (INS)) that will allow us carry out detailed operando gas adsorption studies whilst simultaneously measuring the thermoelectric properties.