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Journal of Photonics for Energy • Open Access

Significance of light-soaking effect in proper analysis of degradation dynamics of organic solar cells
Author(s): Michał Dusza; Wiesław Strek; Filip Granek

Paper Abstract

One of the issues in the organic solar-cell technology that needs attention before mass production is its low long-term stability. These devices need often to be exposed to the light to improve their photovoltaic properties. This effect, known as light soaking, is the cause of challenges related to correct measurements and proper determination of the device lifetime. Lifetime determination and investigation of failure mechanisms of solar-cell devices require reliable measurement approaches. This paper presents the systematic studies on proper analysis of degradation dynamics of organic solar cells (OSCs) taking into account the light-soaking effect. Five groups of organic solar-cell annealed at various conditions (110°C to 170°C and nonannealed) were under investigation for 100 days. Measurement procedure for proper investigation of light-soaking effect is proposed. Solar-cell efficiency improvement, due to light-soaking effect, in range 8% to 27% was observed for as fabricated devices. After 100 days of study, the light soaking-related efficiency improvement increased up to over 100% of initial efficiency. Device lifetimes strongly depend on measurement methods, which were applied. Our results show the importance of taking into account the changes in magnitude of the light-soaking effect in measurements and degradation studies of OSCs.

Paper Details

Date Published: 26 August 2016
PDF: 11 pages
J. Photon. Energy. 6(3) 035503 doi: 10.1117/1.JPE.6.035503
Published in: Journal of Photonics for Energy Volume 6, Issue 3
Show Author Affiliations
Michał Dusza, Wroclaw Research Ctr. EIT+ (Poland)
Polish Academy of Sciences (Poland)
Wiesław Strek, Institute of Low Temperature and Structure Research (Poland)
Filip Granek, Wroclaw Research Ctr. EIT+ (Poland)

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