Origin of vertical orientation in two-dimensional metal halide perovskites and its effect on photovoltaic performance

• DOI: 10.1038/s41467-018-03757-0
• Publication Date: 2018-03-29T22:28:29Z
• Authors: Alexander Z. Chen; Michelle Shiu; Jennifer H. Ma; Matthew R. Alpert; Depei Zhang; Benjamin J. Foley; Detlef-M. Smilgies; Seung-Hun Lee; Joshua J. Choi
• Keywords: Science; Q; 02 engineering and technology; 0210 nano-technology; 7. Clean energy; Article

Abstract Thin films based on two-dimensional metal halide perovskites have achieved exceptional performance and stability in numerous optoelectronic device applications. Simple solution processing of the 2D perovskite provides opportunities for manufacturing devices at drastically lower cost compared to current commercial technologies. A key high is align layers, during processing, vertical electrodes achieve efficient charge transport. However, it yet be understood how counter-intuitive orientations layers substrates can obtained. Here we report a formation mechanism such vertically orientated which nucleation growth arise from liquid–air interface. As consequence, choice liberal polymers oxides depending targeted application. We also demonstrate control over degree preferential orientation its drastic impact performance.