Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP20)
Publication date: 14th October 2019
Recently, the perovskite solar cells have been in the spotlight for next generation solar cells as the conversion efficiency is over 25%. This is comparable to that of silicon solar cells during short period of studies. However, toxicity of lead (Pb) is a major obstacle for the commercialization of perovskite solar cells.
In this work, Sn-based PEAxFA1-xSnI3 perovskites were developed using additives of phenethylammonium iodide (PEAI) and SnF2 for device application in inverted structure (ITO/PEDOT:PSS/Perovskite/PCBM/Ag). We measured absorbance and steady-state photoluminescence measurements to investigate optical properties of PEAxFA1-xSnI3 perovskites and showed the perovskite films with narrow bandgaps about 1.36 ~ 1.38eV. In addition, the amounts of PEAI as mixed cation and tin fluoride (SnF2) to inhibit oxidation of Sn2+ were optimized by measuring the performances of each devices. By introducing optimized PEAI of 15% and SnF2 of 20%, the power conversion efficiency was improved from 3.65% for pristine FASnI3 device to 5.25% for PEAxFA1-xSnI3 device. Furthermore, the stability was maintained at 98% of the initial efficiency after 7 days without encapsulation. Afterward, enhanced performance will be achieved by optimizing the interfaces between charge transport layers and perovskites. These results could promote the development of eco-friend and non-toxic perovskite solar cells.
This work was partly supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (20193091010160, Development of 3D eyed transparent inorganic photovoltaic module) and supported by National Research Foundation of Korea (NRF) grants funded by the Korean government (MSIT) (NRF- 2018R1C1B6008028, 2019K2A9A2A08000132).
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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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