Advancing Operational Stability of Inverted Perovskite Solar Cells Utilizing Parylene-C Encapsulation Techniques
Bibliographic record
Abstract
Advancing Operational Stability of Inverted Perovskite Solar Cells Utilizing Parylene-C Encapsulation TechniquesElnaz Ghahremani Rad a, Abraha Tadese Gidey a, Towhid Chowdhury a, Alexander R. Uhl aa Laboratory for Solar Energy and Fuels (LSEF)School of Engineering, The University of British ColumbiaInternational Conference on Hybrid and Organic PhotovoltaicsProceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV24)València, Spain, 2024 May 12th - 15thOrganizer: Bruno EhrlerOral, Elnaz Ghahremani Rad, presentation 129DOI: https://doi.org/10.29363/nanoge.hopv.2024.129Publication date: 6th February 2024Following advancements to increase the efficiency of perovskite solar cells, the current emphasis is mainly on enhancing their operational stability. Various methods of encapsulation have been employed to safeguard perovskite solar cells from environmental factors and preserve their efficiency. Recent research studies have primarily focused on using organic/inorganic multilayers to create a more robust barrier against the degradation of perovskite solar cells. [1-3]However, the commercial feasibility of employing inorganic materials might be limited due to their high-cost fabrication process and low flexibility. The encapsulation techniques using polymers stand out for their versatility in material selection and functionality, making them suitable for manufacturing flexible devices. Polymers efficiently act as encapsulants, preventing the infiltration of water and oxygen into the perovskite layer while also inhibiting the release of perovskite composition. One such polymer, parylene-C, offers cost-effective extrinsic protection against environmental harm, mainly humidity and oxygen, to uphold the performance and reliability of perovskite solar cells. [4-5] In our study, we utilized a multilayer deposition of parylene-C with a high light and low water vapor transmission rate, uniformly applied across the surface of the perovskite solar cells. To assess the operational stability of these devices, we employed ISOS-D1 and D2 protocols including conditions such as ambient/ambient and 85ºC/ambient, pertaining to temperature/relative humidity. The obtained results underscore the robustness of inverted control perovskite solar cells coated with parylene-C. These cells reached T80, lasting over 210 hours at an accelerated temperature of 85ºC and 30-35% relative humidity, in contrast to their unencapsulated counterparts, which failed after undergoing the accelerated test for 98 hours. Furthermore, we conducted a study on the operational mechanisms of the devices influenced by degradation using impedance spectroscopy measurements at open-circuit conditions with various irradiances, and dark conditions at different biases. References:[1] J. Zhou, X. Tian, Y. Gao, S. Zhang, Y. Zhang, Z. Liu and W. Chen, Enhancing the Stability of Perovskite Solar Cells with a Multilayer Thin-Film Barrier, ACS Applied Energy Materials 2023, 6, 1413-1421.[2] J. Zhou, Z. Liu, P. Yu, G. Tong, R. Chen, L.K. Ono, R. Chen, H. Wang, F. Ren, S. Liu, J. Wang, Z. Lan, Y. Qi and W. Chen, Modulation of perovskite degradation with multiple-barrier for light-heat stable perovskite solar cells, Nature Communications 2023, 14, 6120.[3] Y.I. Lee, N.J. Jeon, B.J. Kim, H. Shim, T.-Y. Yang, S.I. Seok, J. Seo and S.G. Im, A Low-Temperature Thin-Film Encapsulation for Enhanced Stability of a Highly Efficient Perovskite Solar Cell, Advanced Energy Materials 2018, 8, 1701928.[4] H. Kim, J. Lee, B. Kim, H.R. Byun, S.H. Kim, H.M. Oh, S. Baik and M.S. Jeong, Enhanced Stability of MAPbI3 Perovskite Solar Cells using Poly(p-chloro-xylylene) Encapsulation, Scientific Reports 2019, 9, 15461.[5] J. Zhou, X. Tian, R. Chen, W. Chen, X. Meng, X. Guan, J. Wang, S. Liu, F. Ren, S. Zhang, Y. Zhang, Z. Liu and W. Chen, An ultra-thin chemical vapor deposited polymer interlayer to achieve highly improved stability of perovskite solar cell, Chemical Engineering Journal 2023, 461, 141914.Acknowledgements:The authors acknowledge that this work was conducted on the traditional, ancestral, and unceded territory of the Syilx Okanagan Nation (Kelowna). E.G., A.T.G., T.H.C., and A.R.U. acknowledge the financial support provided by the Natural Sciences and Engineering Research Council of Canada (NSERC) through grants RGPIN-2019-05489 and DGECR- 2019-00450 as well as the Canada Foundation for Innovation (CFI) and British Columbia Knowledge Development Fund (BCKDF) through grant 39081. © FUNDACIO DE LA COMUNITAT VALENCIANA SCITOnanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.MATSUSPreviously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.International Conference on Hybrid and Organic PhotovoltaicsInternational Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and OptoelectronicsThe main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and OptoelectronicsThe International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".