Proceedings of International Conference on Perovskite Thin Film Photovoltaics, Photonics and Optoelectronics (ABXPV18PEROPTO)
Publication date: 11th December 2017
During the past few years hybrid organic-inorganic perovskites (HOIPs) have attracted much interest as solution-processed semiconductors with high potentialities in optoelectronics and photovoltaics. On the one hand 3D HOIPs such as CH3NH3PbI3 have shown their outstanding performances when incorporated in solar cells [2]. On the other hand their 2D layered counterparts such as (C6H5C2H4NH3)2PbI4 (PEPI) are promising materials for light emitting devices because of their strong emission at room temperature [3]. However, the optoelectronic properties of hybrid perovskite polycrystalline films suffer from a microscale grain structure [4]. In order to take advantage of the great potential of these materials for both photovoltaics and emitting devices, the synthesis of large monocrystalline films is a key issue. Here we propose a fast crystallization method for layered hybrid perovskites. A vapor-assisted process coupled with a capping of the precursor solution allows to grow 2-dimensionnal thin films with millimetric monocrystalline grains, a high aspect ratio and a good surface quality. In addition, we highlight the benefits of using γ-butyrolactone (GBL) for the growth of layered perovskites monocrystalline grains. [1]
[1] F. Lédée, G. Trippé-Allard, H. Diab, P. Audebert, D. Garrot, J.-S. Lauret, and E. Deleporte, “Fast growth of monocrystalline thin films of 2D layered hybrid perovskite,” CrystEngComm, vol. 8, pp. 208–215, 2017.
[2] “efficiency_chart NREL.” [Online]. Available: http://www.nrel.gov/ncpv/images/efficiency_chart.jpg. [Accessed: 20-May-2016].
[3] K. Gauthron, J. Lauret, L. Doyennette, G. Lanty, A. Al Choueiry, S. J. Zhang, L. Largeau, O. Mauguin, J. Bloch, and E. Deleporte, “Optical spectroscopy of two-dimensional layered (C6H5C2H4-NH3)2-PbI4 perovskite,” Opt. Express, vol. 18, no. 6, pp. 5912–5919, 2010.
[4] W. Nie, H. Tsai, R. Asadpour, A. J. Neukirch, J.-C. Blancon, G. Gupta, J. J. Crochet, M. Chhowalla, S. Tretiak, M. a Alam, H. Wang, and A. D. Mohite, “High-efficiency solution-processed perovskite solar cells with millimeter-scale grains,” Science (80-. )., vol. 347, no. 6221, pp. 522–525, 2015.
The project leading to this application has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 687008 (GOTSolar).