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dc.contributor.advisorHarbola, Upendra
dc.contributor.authorMitra, Souvik
dc.date.accessioned2020-06-04T10:49:14Z
dc.date.available2020-06-04T10:49:14Z
dc.date.submitted2020
dc.identifier.urihttp://etd.iisc.ac.in/handle/2005/4436
dc.description.abstractAbstract: The study of light emission [1] from a molecular junction is recently gaining research interest. This has direct relevance to develop novel optoelectronic devices [2] and to understand light-matter interaction in the non-equilibrium systems at a fundamental level. In this work, I have studied the theory for spontaneous light emission (SLE) from a molecular junction. I have computed the signal based on doublesided ladder diagrams which are standard for traditional(equilibrium) spectroscopy. For understanding the SLE process, it is important to understand the electron-transport in molecular junction. So I have given a brief explanation for the same in my thesis. I have addressed in my thesis, some recent current-induced SLE experiments where “upconversion” is observed and discussed the proposed mechanism for the same. From our perturbative calculations[3], the signal is shown to have two leading order contributions, identified as Current Induced Fluorescence(CIF) and Electroluminescence(EL). This allows us to identify a general mechanism that explains the origin of the “upconversion” signal, which has been observed in a variety of molecular junction experiments. We have also found the existence of a bias dependent peak similar to what was observed in several experiments[4,5]. Along with this perturbative calculation, I have studied the SLE process with Quantum Master Equation (QME)[6].en_US
dc.language.isoen_USen_US
dc.rightsI grant Indian Institute of Science the right to archive and to make available my thesis or dissertation in whole or in part in all forms of media, now hereafter known. I retain all proprietary rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertationen_US
dc.subjectSpectroscopyen_US
dc.subjectMolecular Junctionen_US
dc.subjectSpontaneous Emissionen_US
dc.subjectSLEen_US
dc.subject.classificationTheoretical Chemistryen_US
dc.titleSpontaneous Light Emission from Molecular Junctionsen_US
dc.typeThesisen_US
dc.degree.nameMSen_US
dc.degree.levelMastersen_US
dc.degree.grantorIndian Institute of Scienceen_US
dc.degree.disciplineFaculty of Scienceen_US


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