Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics (AP-HOPV17)
Publication date: 7th November 2016
Organic-inorganic hybrid halide perovskites (e.g., CH3NH3PbI3 or MAPbI3) have recently emerged as a new class of light absorbers that have demonstrated a rapid progress for solar cell applications. The certified solar conversion efficiencies have reached >22% for a small-area (~0.1 cm2) device and close to 20% for a device with 1-cm2 active area. Despite the rapid progress demonstrated by these light absorbers, there is still a lack of understanding of some fundamental material/physical/chemical properties of these materials. Here I will discuss our recent studies toward a better understanding and control of perovskite nucleation, grain growth, and microstructure evolution using solution processing [1,2]. The precursor chemistry and growth conditions are found to affect significantly the structural and electro-optical properties of perovskite thin films. Our recent study shows that a simple post-growth MABr treatment to the perovskite MAPbI3 thin films can induce substantial grain coarsening via Ostwald ripening, leading to much improved film properties regardless of the initial film quality (e.g., pinholes and grain size). Thus, this new chemical approach enhances processing tolerance to the initial perovskite film quality and improves the reproducibility of device fabrication. The impact of grain boundary on charge transport and recombination as well as on perovskite stability will be discussed. In addition, I will briefly discuss our recent investigation on stabilizing perovskite structures by tuning tolerance factor through solid state alloying [3]. These results and others will be discussed.
References
[1] M. Yang, Y. Zhou, Y. Zeng, C.-S. Jiang, N. P. Padture, K. Zhu, Adv. Mater. (2015) 27, 6363; [2] M. Yang, T. Zhang, P. Schulz, Z. Li, G. Li, D. H. Kim, N. Guo, J. J. Berry, K. Zhu, Y. Zhao, Nat Commun (2016), 7, 12305; [3] Z. Li, M. J. Yang, J. S. Park, S. H. Wei, J. J. Berry, K. Zhu, Chem. Mater. (2016) 28, 284.
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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.