Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV18)
Publication date: 21st February 2018
As an alternative of conventional solar cells, perovskite solar cells are currently promising due to their high performance. The technology, however, shares the critical problem of low-stability which prevent their commercialization. In this respect, a new approach to address stability issues is still required and important. Moreover, it brings us a dramatic potential if the approach not only improve the stability, but also go the fabrication cost down. In this work, we propose carbon allotropes-sandwiched structure, in which fullerene bottom layer as an electron transporting layer resolves low stability induced by widely-used TiO2 layer and carbon nanotube top electrode layer functioning as both hole transporting and electrode layers offers high stability and low-cost merits. Carbon allotropes-sandwiched devices fabricated using different hole-transporting materials infiltrated into carbon nanotube networks were compared to find out the best solution to stability and cost. We measured time evolution of power conversion efficiency under constant one sun illumination to examine their lifetime. As a consequence, polymeric hole-transporting layers show much longer lifetime when infiltrated into carbon nanotube networks because of their compact nature and stronger interaction with the carbon network, which is evidenced by computation calculation and water vapor transmission rate results. Finally, the encapsulated carbon allotropes-sandwiched perovskite solar cells including polymeric hole-transporting layer showed high stability against both air and light, maintaining up to 85% of the initial efficiency after 2200 hours under actual operation conditions. Cost analysis also shows that our carbon-sandwiched approach brings the fabrication cost down to less than 5.5% compared with conventional devices employing Au electrode. Our study suggests a promising cell structure for highly stable and low-cost perovskite photovoltaic technologies.
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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.
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.