Étude de L'évolution de La Réponse électrique - Paris, France - Institut de Recherche de Chimie Paris (IRCP), ENSCP, Chimie ParisTech, CNRS/UMR 8247

Description

Étude de l'évolution de la réponse électrique de cellules solaires soumises à différents types de stress
:

• Réf
  ABG123998
• Sujet de Thèse 20/05/2024
• Autre financement public
• Institut de Recherche de Chimie Paris (IRCP), ENSCP, Chimie ParisTech, CNRS/UMR 8247
• Lieu de travail
• Paris et GifsurYvette
• IledeFrance
• France
• Intitulé du sujet Étude de l'évolution de la réponse électrique de cellules solaires soumises à différents types de stress.
• Champs scientifiques
• Physique
• Energie

• Mots clés

• Photovoltaïque, spectroscopie d'impédance, cellules solaires, matériaux semiconducteurs, réponses électriques

Description du sujet:


Study by frequency and temperature dependent techniques of the electrical response of photovoltaic solar cells submitted to aging stressors.

CONTEXT

The degradation of photovoltaic (PV) solar cells is caused by a number of factors that have an impact on their effectiveness, performance, and lifetime.

The degradation pathways depend on the solar cell technology and on the degradation agent (light, humidity, temperature ).

Understanding the degradation processes and their consequence on the solar cells electrical response is necessary to develop more reliable devices.

The 3 years PhD thesis will aim at understanding and proposing solutions to suppress the mechanisms of long-term photovoltaic cell degradation, in order to guarantee longer operating times.

PhD Project

• The PhD thesis is proposed by the IRCP (UMR8247) and by the GeePs laboratory (UMR8507) for implementing electrical measurements on devices to get converging and complementary information on aging mechanisms. The effects of various degradation agents (light, temperature, applied bias, moisture...) on the electrical response of solar cells will be investigated by admittance spectroscopy (AS), DLTS (Deep Level Transient Spectroscopy) and impedance spectroscopy (IS).

The PhD student's work will focus on various types of PV technologies:

silicon heterojunction, III-V, CIGS and perovskite solar cells.- The IS spectra of the solar cells will be measured over a large frequency range in two different modes before and after aging episodes: at various applied voltages and at various light intensities.

The evolution of the spectrum features upon aging will be linked to changes occurring at the interfaces and within the layers.

The spectra will be analyzed using ad-hoc equivalent electrical circuits which electrical elements will be assigned to different physical/chemical phenomena and cell locations thanks to chemical/defect analyses and electrical modelling.

The same solar cells will be studied by admittance and capacitance techniques.

Additionally, DLTS (Deep Level Transient Spectroscopy) measurements will be performed, and the DLTS spectra will be correlated to the impedance/admittance spectra.

With the comparison between this set of electrical characterization techniques, and with the support of numerical modelling that will be developed in parallel, we aim at converging interpretations and better understanding of the physico-chemical processes at hand in the degradation of solar cells, e.g.

in terms of creation of defects, presence of ions and their migration, changes in the transport across interfaces.


Prise de fonction:

• 01/10/2024
  Nature du financement:
• Autre financement public

Précisions sur le financement:

• Projet Minotaure du PEPR TASE
  Présentation établissement et labo d'accueil:
• Institut de Recherche de Chimie Paris (IRCP), ENSCP, Chimie ParisTech, CNRS/UMR 8247

The host laboratories are the Institut de Recherche de Chimie Paris (IRCP) (Paris) and the Génie Électrique et Électronique de Paris Laboratory (GeePs) (Gif-sur Yvette). The thesis enters in the framework of the PEPR (Programme et Equipement Prioritaire de Recherche) TASE (Technologies Avancées des Systèmes Énergétiques), in the project MINOTAURE (Multimodal approach combining IN-situ, ex-situ and Operando characTerizAtion with simUlations for highly Reliable next gEneration photovoltaics). This project brings together more than twenty laboratories working in the PV field. It began at the end of 2023 and will run for 5 years, with the aim of developing studies to understand and propose solutions to suppress the mechanisms of long-term photovoltaic cell degradation, in order to guarantee longer operating times.


Site web:


Intitulé du doctorat:

• Doctorat de physique
  Pays d'obtention du doctorat:
• France

Etablissement délivrant le doctorat:

• Université Paris PSL
• Knowledges in Material science, Physics of semiconductors, Photovoltaics, Optoelectronics, Electrical measurements for device investigations.
• Good writing skills
• Good communication, and organizational skills.
• Interpersonal skills, problemsolving, initiative, rigor, and ability to work between two laboratories. 19/07/2024