Publication date: 21st July 2025
The highly sought after optoelectronic properties of metal halide perovskites and their straightforward solution-processability offers a promising way ahead to realizing high-performance devices through additive approaches like printing.[1,2] The composition of inks used in printing plays a vital role in functional thin film formation which is critical for optical conversion and electrical transport in devices. However, understanding and controlling crystallization of perovskite layers from printed wet films on substrates for device applications remains largely elusive. In this study, the influence of graphene nanosheets on the crystallization dynamics of inkjet-printed methyl ammonium lead bromide (MAPbBr3) thin films is presented and leveraged for device application in photodetection.
The centers of heterogeneous nucleation could be ascribed to graphene nanosheets, resulting in highly textured films while retaining optical properties such as the absorption and emission features of the MAPbBr3. Stark differences in morphology ranging from poorly connected island films to dendritic networks were observed through a variety of microscopic techniques and correlated to the crystalline orientation from x-ray diffraction studies. Additionally, a correlation with time resolved photoluminescence exhibited an interesting evolution in the decay profile that could be linked to the crystallinity of the films, as well as with electrical measurements. To profit from the control on crystallinity to the electro-optical characteristics of these films, printed photodetectors were investigated and found to exhibit strong selective photoresponse above 2.3 eV without the use of external filtering. Benefitting from the influence of graphene on the optoelectronic properties of the films, devices with responsivities of 2 A W-1 and detectivities of nearly 1.9×1010 Jones were obtained. Similarly, flexible devices were also fabricated on polymer substrates and found to have good retention of photoresponse to cyclical mechanical stress. These findings point to the crucial role of tuning ink composition with nano-additives such as graphene, its impact on film formation, and implication in the optoelectronic performance of printed devices.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
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.