Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP23)
DOI: https://doi.org/10.29363/nanoge.iperop.2023.018
Publication date: 21st November 2022
Since perovskite solar cell (PSC) achieved high efficiency over 25%, fundamental studies of PSCs have been directed to stability and durability improvement by defect passivation and interfacial modification while efficiency development is becoming a major issue for large area modules and muti-junction tandem cells.1 We have been tackling interfacial passivation with functional organic molecules, particularly focusing on the method of enabling high voltage output (close to theoretical limit) in photovoltaic performance.2 In compositional engineering, inorganic perovskites are promising in the viewpoints of high thermal stability and potentially high stability against light-assisted phase segregation. Besides the perovskite composition, use of diffusible dopants in hole transport materials (HTMs) are responsible for low stability of perovskites at high temperatures (>120oC). In this respect, use of dopant-free HTMs for all-inorganic perovskite absorbers is highly desired. CsPbI2Br perovskites in combination of dopant-free polymer HTMs achieved PCEs of >17% under 1 sun and >34% under indoor LED illumination, supported by high Voc values and low voltage deficits.3 Phase segregation in CsPbI2Br is less than those for hybrid perovskite and it was not observed under indoor light circumstance. Therefore, inorganic PSCs are promising for applications to the IoT industry. Creation of new inorganic perovskite materials includes lead-free compositions. As a typical composition, Ag-Bi-halide (sulfide) system is an important target for achieving environmentally kind PSCs, where the method to achieve high Voc by interfacial passivation is the key to high efficiency.4
Applications of PSCs in space environments attract attentions because thin perovskite photovoltaic films demonstrate high stability and tolerance against exposure to high energy particle irradiations (proton and electron beams).5 Thin absorbers (<500 nm) avoid accumulation of particles and due to intrinsic defect tolerant nature of perovskites, radiation-induced collision damage is highly suppressed. Based on our current R&Ds, future perspectives of perovskite photovoltaics will be presented.
1. T. Miyasaka, editor, Perovskite Photovoltaics and Optoelectronics ―From Fundamentals to Advanced Applications―, Wiley-VCH, Weinheim, 2021, ISBN: 978-3-527-34748-3.
2. G. M. Kim, H. Sato, Y. Ohkura, A. Ishii, and T. Miyasaka, Adv. Energy Mat. 2022, 12, 2102856.
3. Z. Guo, A. K. Jena, I. Takei, M. Ikegami, A. Ishii, Y. Numata, N. Shibayama, T. Miyasaka, Adv. Func. Mat. 2021, 31, 2103614.
4. T. Miyasaka, A. Kulkarni, Gyu Min Kim, Senol Öz, A. K. Jena, Adv. Energy. Mat. 2019, 1902500.
5. Y. Miyazawa, M. Ikegami, H.-W. Chen, T. Ohshima, M. Imaizumi, K. Hirose, T. Miyasaka, iScience 2018, 2, 148.
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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.