Proceedings of International Conference on Perovskite Thin Film Photovoltaics, Photonics and Optoelectronics (ABXPV18PEROPTO)
DOI: https://doi.org/10.29363/nanoge.abxpvperopto.2018.077
Publication date: 11th December 2017
Solar cells for low light harvesting are acquiring in the recent years an increasing interest for their commercial application in the market of Electronic and Product Integrated Photovoltaics (EIPV and PIPV). The solar technology based on perovskite crystals (PSCs) has a huge potential in this field.
In this work, we show that, for low light application, the reduction of electron recombination at the front contact and improved crystal quality are very crucial. Thus, a 2-fold optimization of the monolithic carbon-graphite based PSC used in this study is performed to achieve low non-radiative recombination and, hence, high VOC and efficiency under both full Sun and indoor light conditions:
1. Four different up-scalable electron selective layer (ETS) processes (sputtering, spray pyrolysis, screen-printing and atomic layer deposition) have been investigated through Dark Lock-In Thermography (DLIT) and optimized to achieve a pin-hole/defect free layer and reduced electron-hole recombination. With a spatial resolution < 100 μm, the DLIT analysis (vs. applied voltage) allows the determination of shunts in the layer. Furthermore, shunts can be distinguished into linear (ohmic) and non-linear through plotting the local I-V curve. Transmittance, SEM, AFM, XRD and ellipsometry support the whole analysis. Among the investigated ESLs, the PSCs fabricated with the c-TiO2 ALD-processed ESL showed the maximized VOC.
2. The high quality of the perovskite crystals into the porous structure of the carbon-graphite based PSC is achieved by a molten-salt based MAPbI3 precursor solution. This approach allows a dense pore filling (demonstrated by SEM and EDX maps) and a very fast charge transport through the porous layers (analysed by JSC, VOC and photoluminescence transients). Thereby, a stabilized photovoltage as high as 1 V is a reached, which is the highest for monolithic hole-transport-layer (HTL) free MAPbI3-based devices. We measured a stabilized PCE of 13.8% under 1 Sun and we report the certified stabilized efficiency of 12.6 %.
Following these two optimizations, the resulting high-efficient and low-cost HTL-free PSC is measured under low light intensity as well as under compact fluorescent lamp (CFL) and light-emitting diode (LED) illumination.
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.