Channa, Iftikhar Ahmed and Chandio, Ali Dad and Rizwan, Muhammad and Shah, Aqeel Ahmed and Bhatti, Jahanzeb and Shah, Abdul Karim and Hussain, Fayaz and Shar, Muhammad Ali and AlHazaa, Abdulaziz (2021) Solution processed PVB/mica flake coatings for the encapsulation of organic solar cells. Materials, 14 (10). ISSN 1996-1944, DOI https://doi.org/10.3390/ma14102496.
Full text not available from this repository.Abstract
Organic photovoltaics (OPVs) die due to their interactions with environmental gases, i.e., moisture and oxygen, the latter being the most dangerous, especially under illumination, due to the fact that most of the active layers used in OPVs are extremely sensitive to oxygen. In this work we demonstrate solution-based effective barrier coatings based on composite of poly(vinyl butyral) (PVB) and mica flakes for the protection of poly (3-hexylthiophene) (P3HT)-based organic solar cells (OSCs) against photobleaching under illumination conditions. In the first step we developed a protective layer with cost effective and environmentally friendly methods and optimized its properties in terms of transparency, barrier improvement factor, and bendability. The developed protective layer maintained a high transparency in the visible region and improved oxygen and moisture barrier quality by the factor of similar to 7. The resultant protective layers showed ultra-flexibility, as no significant degradation in protective characteristics were observed after 10 K bending cycles. In the second step, a PVB/mica composite layer was applied on top of the P3HT film and subjected to photo-degradation. The P3HT films coated with PVB/mica composite showed improved stability under constant light irradiation and exhibited a loss of <20% of the initial optical density over the period of 150 h. Finally, optimized barrier layers were used as encapsulation for organic solar cell (OSC) devices. The lifetime results confirmed that the stability of the OSCs was extended from few hours to over 240 h in a sun test (65 degrees C, ambient RH%) which corresponds to an enhanced lifetime by a factor of 9 compared to devices encapsulated with pristine PVB.
| Item Type: | Article |
|---|---|
| Funders: | Higher Education Commission of Pakistan through NED University of Engineering and Technology, Karachi, Pakistan, King Saud University |
| Uncontrolled Keywords: | Thin barrier films; Synthetic mica composite; Flexibility; Transparency; Solar cell protection |
| Subjects: | Q Science > QC Physics Q Science > QD Chemistry T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Faculty of Engineering > Department of Mechanical Engineering |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 01 Sep 2022 07:13 |
| Last Modified: | 01 Sep 2022 07:13 |
| URI: | http://eprints.um.edu.my/id/eprint/34164 |
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