ORGANIC SOLAR CELLS: STUDY OF STABILITY AND DEGRADATION UNDER CONTINUOUS USE

Yosthyn Manuel Ariza Florez; Roberto Faria; Gregório Faria

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Submission

Paper Title

ORGANIC SOLAR CELLS: STUDY OF STABILITY AND DEGRADATION UNDER CONTINUOUS USE

Authors

Yosthyn Manuel Ariza Florez
Roberto Faria
Gregório Faria

Modality

Pôster

Subject area

Dispositivos eletrônicos e ópticos (OLED/OFET/OPVs/etc.)

Publishing Date

12/12/2023

Country of Publishing

Brasil

Language of Publishing

Inglês

Paper Page

https://www.even3.com.br/anais/workshop-do-ineo-2023/612855-organic-solar-cells--study-of-stability-and-degradation-under-continuous-use

ISBN

978-65-272-0088-8

Keywords

organic solar cells, polymeric blend, efficiency, stability, solar radiation

Summary

Organic solar cells (OSC) are devices based on small molecules or conjugated polymers, which can transform light energy into electric current [1]. These devices have attracted attention of the scientific community because of their low manufacturing cost, compatibility with flexible electronics, and efficiencies that approaches those of semicrystalline silicon. Despite the high efficiencies of OSCs, there is a lack of scientific studies that investigate degradation processes in continuous use and under ambient conditions. The very first step towards standardization in OSC reliability/stability tests was made in 2011 during the Intentional Summer on Organic Photovoltaic Stability (ISOS), where testing guidelines and protocols were established [2]. However, the ISOS protocols are still not being completely followed by the OSC community, making degradation data on photovoltaics difficult to compare and replicate. Therefore, in this work focuses on the development and characterization of organic photovoltaic devices in order to study stability and degradation phenomena in continuous operation, following the ISOS protocols. For this purpose, active layers produced from a polymer blend of P3HT - poly(3-hexylthiophene) - with PC61BM - [6,6]-phenyl-C61-butyric acid - were used, with area of 0.045 cm2 and conventional structure ITO/PEDOT:PSS/P3HT:PCBM/Ca/Al, which is a well-known organic solar cell structure of the bulk-heterojunction (BHJ). The characterization was conducted by using a ThermoOriel class AAA solar simulator and a Keithley source and meter 238. Current and voltage measurements (J-V) under illumination (100 mW/cm2) was obtained allowing one to extract OSC characteristics and parameters. Fresh devices provided an average value of short circuit current density (JSC) of 10 mA/cm2, Open Circuit Voltage (VOC) of 0.60 V, fill factor (FF) of 47% and Power conversion efficiency (PCE) of 3%. To measure the degradation under continuous operation, the ISOS-D-1 dark (temperature and relative humidity values at ambient conditions) test protocol was used [2]. Here, the device is exposed to atmospheric air, without further encapsulation. Results revealed that the device maintained 80% of its PCE (T80) after 3.5 h of continuous operation, while the JSC, VOC and FF decays to 80% of its initial value only after 5h of operation. It is reaffirmed that oxygen is one of the main factors influencing the degradation of a photovoltaic device and guidelines for improving lifetime of OSC under continuous operation is discussed. References: [1] Doumon, N. Y. (2019). The degradation of organic solar cells: from chemistry to device physics through materials. [Groningen]: University of Groningen. https://doi.org/10.33612/diss.98539626. [2] Reese, M. O., Gevorgyan, S. A., Jorgensen, M., Bundgaard, E., Kurtz, S. R., Ginley, D. S. et al (2011). Consensus stability testing protocols for organic photovoltaic materials and devices. Solar Energy Materials and Solar Cells, 95, 1253-1267. https://doi.org/doi:10.1016/j.solmat.2011.01.03

Title of the Event: Workshop do INEO 2023
City of the Event: Nazaré Paulista
Title of the Proceedings of the event: Anais do Workshop INEO 2023
Name of the Publisher: Even3
Means of Dissemination: Meio Digital
DOI: Get DOI

How to cite

FLOREZ, Yosthyn Manuel Ariza; FARIA, Roberto; FARIA, Gregório. ORGANIC SOLAR CELLS: STUDY OF STABILITY AND DEGRADATION UNDER CONTINUOUS USE.. In: Anais do workshop INEO 2023. Anais...Nazaré Paulista(SP) Hotel Estância Atibainha, 2023. Available in: https//www.even3.com.br/anais/workshop-do-ineo-2023/612855-ORGANIC-SOLAR-CELLS--STUDY-OF-STABILITY-AND-DEGRADATION-UNDER-CONTINUOUS-USE. Access in: 27/07/2024