Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV18)
Publication date: 21st February 2018
Crucial point to market a new PV technology is achieving commercialization through low production cost. Graphite based perovskite solar cells are free of costly and potentially unstable organic hole transporting materials (HTM). Insulation or space layer play an important role in graphite based persovsktie solar cells (PSC) providing isolation between the charge selective layers, thereby preventing recombination of electrons with holes at the counter electrode. In our previous work on graphite based PSCs using thick ZrO2 as space layer, we reported high photo voltages of 1 V and a certified stabilised efficiency of 12.6 % using a molten-salt approach [1].
Al2O3 has been proven to be a beneficial alternative as space layer providing efficient isolation between anode and cathode. This work focuses for the first time on solely fabricating a space layer of 10 nm Al2O3 layer through sputtering technique. These ultrathin space layers are compared with standard screen printed 1µm ZrO2. Device resistance measured between the graphite and FTO is in the range if 0.8 to 1.5 MΩ, demonstrating that the cells are free of shunts. Infiltration capabilities of these layers are compared through contact angle measurements. Further, physical properties are studied by SEM, AFM and XRD measurements. In addition to PCE, impedance spectroscopy and time resolved photoluminescence measurements are compared to understand the isolation and interfacial properties. So far, a stabilised efficiency of 9.4% has been reached with a stable voltage of 900 mV, thus demonstrating that this thin layer of Al2O3 is sufficient to function as an isolating layer.
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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.
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.
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