Design, synthesis and characterization of new organic semi-conductors for photovoltaics / Chunxiang Chen  

Public ISBD Titre : Design, synthesis and characterization of new organic semi-conductors for photovoltaics Type de document : texte imprimé Auteurs : Chunxiang Chen, Auteur ; Kathleen Moineau Chane-Ching, Directeur de thèse Année de publication : 2016 Langues : Anglais (eng) Tags : ORGANIC SEMICONDUCTOR  ORGANIC PHOTOVOLTAICS  SYNTHESIS  CHARACTERIZATION Résumé : "Organic solar cells appear as a promising technology to meet future energy requirements, owing to their low production costs, their great flexibility and their ability to be integrated into light devices. Currently, they exhibit modest performances in photoconversion, thus new active molecules with optimized structural properties need to be developed. This work comes in that aim: on the basis of theoretical calculations with density functional theory, new organic semiconductors have been designed and synthesized. For this, the more economical and cleaner syntheses techniques have been employed. Thus, the coupling of the benzothiadiazole with thiophene carboxhaldehyde via direct heteroarylation without additive nor ligand is performed with success for the first time. According to green chemistry techniques, five molecules are thus isolated in only two steps. The study of their optical and electronic properties by means of different spectroscopic techniques (UV/vis, fluorescence) and electrochemistry, of their thermal properties, and of their ability to self-organize have revealed their promising abilities for use in organic photovoltaics. A series of small molecules based on dithienosilole (DTS) core have also been designed via DFT computations. The calculations show their considerable low bandgap. Their syntheses have been conducted. It anticipates their promising potential for organic photovoltaic applications. Finally, a purely theoretical work has been completed on molecules derived from boron subphthalocyanines. The calculations predict interesting electronic properties for these new materials that may lead to promising performances in organic photovoltaics, paving the way for innovative materials." Document : Thèse de doctorat Etablissement_delivrance : Université de Toulouse Date_soutenance : 19/07/2016 Ecole_doctorale : École doctorale Sciences de la Matière (Toulouse) Domaine : Sciences de l'ingénieur [physics]/Matériaux Localisation : LCC En ligne : http://thesesups.ups-tlse.fr/3212/ Design, synthesis and characterization of new organic semi-conductors for photovoltaics [texte imprimé] / Chunxiang Chen, Auteur ; Kathleen Moineau Chane-Ching, Directeur de thèse . - 2016. Langues : Anglais (eng) Tags : ORGANIC SEMICONDUCTOR  ORGANIC PHOTOVOLTAICS  SYNTHESIS  CHARACTERIZATION Résumé : "Organic solar cells appear as a promising technology to meet future energy requirements, owing to their low production costs, their great flexibility and their ability to be integrated into light devices. Currently, they exhibit modest performances in photoconversion, thus new active molecules with optimized structural properties need to be developed. This work comes in that aim: on the basis of theoretical calculations with density functional theory, new organic semiconductors have been designed and synthesized. For this, the more economical and cleaner syntheses techniques have been employed. Thus, the coupling of the benzothiadiazole with thiophene carboxhaldehyde via direct heteroarylation without additive nor ligand is performed with success for the first time. According to green chemistry techniques, five molecules are thus isolated in only two steps. The study of their optical and electronic properties by means of different spectroscopic techniques (UV/vis, fluorescence) and electrochemistry, of their thermal properties, and of their ability to self-organize have revealed their promising abilities for use in organic photovoltaics. A series of small molecules based on dithienosilole (DTS) core have also been designed via DFT computations. The calculations show their considerable low bandgap. Their syntheses have been conducted. It anticipates their promising potential for organic photovoltaic applications. Finally, a purely theoretical work has been completed on molecules derived from boron subphthalocyanines. The calculations predict interesting electronic properties for these new materials that may lead to promising performances in organic photovoltaics, paving the way for innovative materials." Document : Thèse de doctorat Etablissement_delivrance : Université de Toulouse Date_soutenance : 19/07/2016 Ecole_doctorale : École doctorale Sciences de la Matière (Toulouse) Domaine : Sciences de l'ingénieur [physics]/Matériaux Localisation : LCC En ligne : http://thesesups.ups-tlse.fr/3212/

---

1 (1 - 1 / 1) Par page : 25 50 100 200