Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
Publication date: 20th April 2022
Metal halide perovskite solar cells have been improving significantly over the past decade. Their versatile material properties allow the combination with silicon solar cells in monolithic tandem configurations achieving power conversion efficiencies (PCE) above 29 %.[1] Semitransparent top contact layers are a key element for high efficiency perovskite based tandem solar cells.[2] In addition, these top contact layers, namely tin oxide (SnO2) deposited by atomic-layer deposited (ALD) and indium zinc oxide (IZO) deposited by RF-magnetron sputtering, protect the perovskite solar cells against decomposition reactions in humid air and at high temperature, thus improving long term stability. However, the deposition process of top contact layers often induces fill factor (FF) and open circuit voltage (VOC) losses due to perovskite degradation and/or process related defect generation.[3]
In this work, VOC differences between tandem-relevant cells processed with different electron-selective contacts are quantified. We show how VOC losses can be mitigated by using an ultrathin polymer interlayer between the perovskite absorber and the n-type top contact. The perovskite can be protected by introducing polyethylenimine ethoxylated (PEIE), a polymeric interlayer, which reduces degradation and non-radiative recombination losses. This is shown by an increased steady-state photoluminescence quantum yield and improvements in VOC. Additionally, an enhanced nucleation growth of SnO2 on PEIE[4] allows for a thinner and denser SnO2 film. Combined with a thinner C60 layer due to the protective property of PEIE, an overall optical improvement of the top cell transmission could be achieved. Interestingly, PEIE as interlayer between perovskite and C60 can also reduce recombination losses and improve electron extraction as analysed by transient surface photovoltage. These modifications overcome the top contact limitation, increase the overall performance, and push perovskite/silicon tandem solar cells one step closer towards surpassing 30% PCE.
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.