Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV24)
DOI: https://doi.org/10.29363/nanoge.hopv.2024.089
Publication date: 6th February 2024
Organic solar cells (OSCs) have attracted considerable attention for potential commercial applications because of their light weight, mechanical flexibility, semitransparency, and large-area manufacturing properties. Recent advancements in Y-series non-fullerene acceptors (Y-NFAs) and polymer donors have significantly improved the power conversion efficiency of OSCs. In light of these rapid efficiency improvements, it is essential to focus on the stability of photovoltaic materials. These materials are pivotal in determining the operational lifetime of OSCs under real-world conditions, ensuring they meet the necessary standards for future commercial viability. However, the relationship between the molecular structure and the outdoor stability of these devices remains unclear, and there is a deficiency in comprehensive studies that examine operational performance in combination with measurements of photostability and thermal stability.
Here, we explore the stability of various Y-NFAs alongside a common polymer donor and vice versa. Regarding Y-NFAs, we establish a connection between the molecular structure, specifically the endgroup and side-chain, and their photostability. Employing density functional theory (DFT) calculations on the energy barrier for photoisomerization, coupled with device photostability outcomes, we discern that inhibiting light-induced vinyl rotation effectively prolongs device lifetime. Shifting focus to polymer donors, we examine the significance of different building blocks in dictating device longevity. We propose a molecular descriptor to assess the possibility of side-chain breakage. The chemical alterations undergone by Y-NFAs and polymer donors under illumination ultimately lead to notably enhanced trap-assisted recombination, thus compromising device performance in outdoor conditions. Furthermore, we systematically compare the photostability, thermostability, and outdoor stability of devices based on state-of-the-art materials to obtain a comprehensive understanding of how the photoactive layers influence long-term performance in the hot and sunny climate of Saudi Arabia. Our findings offer valuable insights into designing and synthesizing photoactive materials with the goal of achieving high efficiency and long-term stability in outdoor organic solar cells (OSCs).
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International Conference on Hybrid and Organic Photovoltaics
International 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.
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The 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.
The 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.