Organized Organic Dye / Hole Transporting Materials for TiO2 and ZnO based Solid-State Dye-Sensitized Solar Cells (s-DSSCs)
Creators
- Delices, Annette
- Universite Sorbonne Paris Cite, Universite Paris Diderot, Ecole doctorale de Chimie Physique et de Chimie Analytique de Paris- Centre - ED 388, Laboratoire Interfaces Traitements Organisation et Dynamique des Systemes - Itodys, Batiment Lavoisier, 15 rue Jean de Baif, case postale 7090, 75205 Paris Cedex 13 (France)
Description
Due to instability problems of dye sensitized solar cells (DSSCs) in long-time uses, the iodine based liquid electrolyte has been replaced by several types of solid hole transporting materials (HTM) to perform solid state DSSCs (s-DSSCs). Among them, the substitution by conducting polymers (CP) has attracted considerable attention because of their good stability, high hole-conductivity and simple deposition within the mesoporous TiO2 semiconductor. In this thesis work, several s-DSSCs based on CPs used as HTM have been developed in order to improve their photovoltaic performances taking into account the following two objectives: (i) the optimization of the interfacial charge transfer processes within the solar cell, and (ii) the optimization of the charge transport within the n-type oxide semiconductor. To reach these goals, each component that constitutes the device was varied in order to investigate its effect on the device's performances. As first attempt, an analytical study is carried out by varying the sensitizer in order to determine the fragments of the dyes structures, that have an important effect on the in-situ photo electrochemical polymerization process (PEP) both in organic and in aqueous media and hence on the performances of the s-DSSCs. Based on these results, a new concept of removing completely the interface between the dye and the HTM is developed. This is achieved by the synthesis of new dyes covalently linked to an electroactive monomer which is co-polymerized by in-situ PEP. The resulting co-polymer, used as HTM, is covalently linked to the dye. In addition, the nature of the chemical bond linking the triphenylamine residue TPA to the monomer is also investigated as a key factor in the s-DSSCs performances. Besides, and to optimize the charge transport processes within this type of s-DSSC, the elaboration of novel ZnO based s-DSSCs has been achieved and investigated. (author)
Abstract (French)
En raison des problemes d'instabilite a moyen termes des cellules solaires a colorant (DSSC), l'electrolyte liquide a base d'iodure a ete remplace par plusieurs types de materiaux solides transport de trous (HTM) pour obtenir des DSSCs a l'etat solide (s-DSSCs). Parmi ces materiaux, l'utilisation des polymeres conducteurs (PC) a attire une attention considerable en raison de leur bonne stabilite, de leur haute conductivite et de la facilite de leur depot sur le semi-conducteur mesoporeux TiO2. Dans ce travail de these, plusieurs s-DSSCs basees sur des PC utilises comme HTM ont ete developpes dans le but d'ameliorer leurs performances photovoltaiques en tenant compte des deux objectifs suivants: (i) l'optimisation des processus de transfert interfacial de charge dans la cellule solaire, et (ii) l'optimisation du transport de charge dans le semi-conducteur d'oxyde de type n. Pour atteindre ces objectifs, chaque composant de la s-DSSC a ete modifie afin d'etudier son effet sur les performances du dispositif final. En premiere tentative, une etude analytique est realisee en faisant varier le sensibilisateur afin de determiner les fragments de la structure du colorant, qui ont un effet important sur le processus de photopolymerization electrochimique in-situ (PEP) a la fois en milieu organique et en milieu aqueux mais aussi sur les performances des s-DSSCs. Sur la base de ces resultats, un nouveau concept a ete developpe et consiste en la suppression totale de l'interface entre le colorant et le HTM. Ceci est obtenu par la synthese de nouveaux colorants lies de facon covalente a un monomere electroactif qui est co-polymerise par la PEP in-situ. Le copolymere resultant, utilise comme HTM, est lie de maniere covalente au colorant. En outre, la nature de la liaison chimique, reliant le residu triphenylamine TPA au monomere, est egalement etudiee comme un facteur cle dans les performances de s-DSSC. En outre, et pour optimiser les processus de transport de charges dans ce type de s-DSSC, de nouvelles s-DSSC basees sur ZnO ont ete realisees et etudiees. (auteur)
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Additional details
Additional titles
- Original title (English)
- Materiaux transporteurs de trous et colorants organiques organises pour les cellules solaires solides a colorants (s-DSSCs) a base de TiO2 et de ZnO
Publishing Information
- Imprint Pagination
- 196 p.
- Report number
- FRNC-TH--15050
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 54115753
- Subject category
- S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- CHARGE TRANSPORT; COPOLYMERIZATION; DYES; ELECTRIC CONDUCTIVITY; INTERFACES; MONOMERS; N-TYPE CONDUCTORS; PHOTOANODES; SENSITIZERS; SOLAR CELLS; TITANIUM OXIDES; ZINC OXIDES
- Descriptors DEC
- ANODES; CHALCOGENIDES; CHEMICAL REACTIONS; DIRECT ENERGY CONVERTERS; ELECTRICAL PROPERTIES; ELECTRODES; EQUIPMENT; MATERIALS; OXIDES; OXYGEN COMPOUNDS; PHOTOELECTRIC CELLS; PHOTOVOLTAIC CELLS; PHYSICAL PROPERTIES; POLYMERIZATION; REAGENTS; SEMICONDUCTOR MATERIALS; SOLAR EQUIPMENT; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; ZINC COMPOUNDS
Optional Information
- Notes
- 398 refs.; Available from the INIS Liaison Officer for France, see the INIS website for current contact and E-mail addresses