Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics (AP-HOPV17)
Publication date: 7th November 2016
As the power conversion efficiency (PCE) of organic photovoltaic (OPV) devices increases beyond 10%, much research interest has gone into understanding the degradation of these devices and improving their stability. The introduction of an inverted device architecture has been credited with improved stability for a number of reasons, including the use of a high work function metal as the top electrode to protect the device from damage by water and oxygen. In order to provide a fair stability comparison, we fabricated devices of both structures using the same interfacial and electrode materials thus removing differences due to material stability.
We produced OPV devices with standard and inverted structures using zinc oxide (ZnO) as the electron selective layer, molybdenum oxide (MoO3) as the hole selective layer and silver as the top electrode. Unencapsulated devices of each type were then subjected to degradation measurements under either constant or intermittent illuminations conditions for 300 hours after which negligible photovoltaic activity remained. Device characteristics for 6 cells of each type were measured every 30 minutes including open circuit voltage, short circuit current and fill factor.
The stability of each structure was found to strongly depend on lighting conditions, with the standard structure being more stable under constant illumination and the inverted structure more stable under intermittent illumination. The difference in degradation trends for each structure also suggests that the film deposition order and interfaces play an important role in degradation.
We also investigated the effect of UV light on the stability of both the inverted and standard structure by performing constant illumination degradation measurements of devices under a UV filter or with the addition of a UV LED. Interestingly, devices of both structures tested under the UV filter degraded much more rapidly than those tested under unaltered constant illumination suggesting UV light plays some part in maintaining device performance.
nanoGe 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.
Previously 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 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.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
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.