Proceedings of International Conference on Perovskite and Organic Photovoltaics and Optoelectronics (IPEROP19)
Publication date: 23rd October 2018
Responding to global warming is an urgent issue towards a sustainable society. Expansion of renewable energy replacing fossil fuels is expected to spread. Photovoltaic power generation is one promising answer. Among photovoltaic devices, the perovskite solar cell (PSC) which has a sudden improvement in conversion efficiency, is an attractive technology. Therefore, we are conducting research and development activities in synthesis of low-cost materials, and establishing low-cost fabrication methods of PSCs.
Spiro-OMeTAD still is the most widely used small molecule hole transport material (HTM) for PSCs. However, it is relatively expensive among the component materials of PSCs. In order to reduce power generation costs, replacing with low-cost material is crucial. So, we focused on phthalocyanine which is used extensively as pigments and organic semiconductors, and synthesized various derivatives as soluble HTM. In this presentation, we show the evaluation results of the PSC with around 15 % of efficiency using our phthalocyanine derivative. It shows phthalocyanine will become the solution for HTM's cost problem.
On the other hand, we are applying spray coating method to fabricate a perovskite light absorbing layer. Usually, just spraying precursor solution without a following anti-solvent process gives us needle-like perovskite. Adding methylammonium chloride to the precursor solution and optimizing spray conditions resulted in fine perovskite layer and over 10 % of cell conversion efficiency. Finally, we made small test modules with spray coating method with average conversion efficiency of 13 %.
This presentation is based on results obtained from a project commissioned by the New Energy and Industrial Technology Development Organization (NEDO).
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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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