Study of the Stability of Encapsulated and Non-encapsulated Polymeric Photovoltaic Cells under Sun and Indoor illumination

Entity: Universitat Rovira i Virgili (URV)

Confidenciality: No

Education area(s): Nanociència, Materials i Processos - Tecnologia Química de Frontera 

APS: NO

Title in different languages: Study of the Stability of Encapsulated and Non-encapsulated Polymeric Photovoltaic Cells under Sun and Indoor illumination

Abstract: In this study, we analyze the degradation behavior of conventional polymeric solar cells (PSCs) under both solar and indoor illumination. In addition, we compare the results obtained with encapsulated and non-encapsulated devices. The performance of the PTB7:PC70BM-based cell showed an initial efficiency of 8.4 % under AM1.5G solar illumination and 12.0% under the LED one. The work describes first the results obtained after the measurement and analysis of the degradation process, performed by a current density – voltage (J–V) characteristic curve study, taking into account 4 performance parameters: power conversion efficiency (PCE), short circuit current density (JSC), open-circuit voltage (VOC) and fill factor (FF). The PCE of encapsulated devices under LED illumination decreased a 20% of the initial PCE after 624 h, while under sun illumination it lost a 90 % after 900 h. After this an impedance spectroscopy study was performed to analyze the internal evolution of the cell under solar AM1.5G illumination, getting to the conclusion that the active layer is the most affected when being encapsulated.

Subject: Electrònica

Academic year: 2021-2022

Language: en

Work's public defense date: 2022-09-08

Subject areas: Electronic engineering

Student: Serantes Melo, Marta

Department: Enginyeria Electrònica, Elèctrica i Automàtica

Creation date in repository: 2022-11-25

Keywords: degradation, encapsulated solar cells, current density-voltage, impedance, polymeric solar cells, PTB7:PC70BM, indoor illumination, solar illumination

Title in original language: Study of the Stability of Encapsulated and Non-encapsulated Polymeric Photovoltaic Cells under Sun and Indoor illuminationEfecto de los edulcorantes no nutritivos en la glucemia y metabolismo de personas con diabetes mellitus de tipo 2: revisión sistemática y metaanálisis

Access Rights: info:eu-repo/semantics/openAccess

Project director: Pallarès Marzal, Josep