Proceedings of International Conference on Perovskite Thin Film Photovoltaics and Perovskite Photonics and Optoelectronics (NIPHO20)
Publication date: 25th November 2019
In the past few years, resonant semiconductor nanoparticles (NPs) were proved to be a powerful tool for efficient incident light scattering and enhancement, that has been recently employed for a number of applications [1,2]. Therefore, they can be integrated in perovskite solar cells (PSCs) for additional efficiency growth. In addition, Mie resonant silicon nanoparticles with high refractive index are able to provide not only the optical part of solar cells optimization, but also, being doped by elements of III/V groups, take part on the device charge transport.
In our work, we show that the Mie resonant silicon nanoparticles can boost the efficiency of n-i-p based PSCs being in different location on the perovskite device: between mesoporous electron transport layer (ETL) [3] and perovskite or in hole transporting layer [4]. The choice of well-studied perovskite MAPbI3 is the reason to avoid any influence of material’s composition. We achieved the PSC improvement of efficiency up to 18.8% by incorporation of pristine resonant silicon nanoparticles as loose interlayer between ETL-perovskite location mostly by light management which is confirmed by photoluminescence enhancement and, as a result, by Voc growth. The highest PSCs efficiency for NPs implementation into hole transporting layer is 18.7%. In this case, the best result was achieved with Al-doped silicon NPs by charge transport improvement and partially by generation rate enhancement that was proved experimentally and theoretically.
Our theoretical analysis includes a comprehensive multiphysics modeling of interdependent optical and electrical effects caused by doped and undoped Si NPs in different location of PSCs. We revealed a resonant behavior of silicon inclusions that contribute to enhanced generation rate. Also, we investigated charge carrier transport properties of our solar cell for different architectures. The proposed method of PSCs improvement by nanophotonic elements is important for optimization of perovskite-based devices with different architecture and composition.
This work was supported by Russian Science Foundation (19-73-30023)
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