Proceedings of nanoGe International Conference on Perovskite Solar Cells, Photonics and Optoelectronics (NIPHO19)
DOI: https://doi.org/10.29363/nanoge.nipho.2019.008
Publication date: 21st November 2018
Many of the physical and engineering aspects that govern the behavior of perovskite photovoltaics occur at interfaces. Especially, the metal oxide-perovskite interface is of great importance for inverted perovskite PV operation, and control of the interfacial materials properties is critical for high performance photovoltaics [1]. As an example, we have recently reported the synthesis and characterization of a low-temperature solution-processable monodispersed nickel cobaltite (NiCo2O4) as a hole transporting layer for inverted perovskite PVs. NiCo2O4 is a p-type semiconductor consisting of environmentally friendly, abundant elements and higher conductivity compared to NiO. We have shown that interfaces influence the perovskite grain boundaries formation and that control of interfacial energetics are very beneficial for inducing a desired functionality [2]. Hence, the development of intimate interfaces through their fundamental understanding and manipulation is expected to be crucial to the continued progress of perovskite PVs [3]. Up to now the main efforts of the perovskite research community have been focused on improving the power conversion efficiency (PCE). There are fewer reports on the degradation of perovskite PVs. We have recently reported long thermal stability of inverted perovskite photovoltaics [4] by incorporation of fullerene-based diffusion blocking layer (please see figure below) but the underlying degradation mechanisms of the anode-cathode metal oxide-based interfaces remain unclear. The presentation aims in covering a range of interfacial engineering concepts for high performance perovskite photovoltaics. A systematic understanding of the relationship between recently developed metal oxide interface materials [1,2], processing/ electrodes [2,3] and device performance [3,4] will be presented.
Funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (H2020-ERC-2014-GoG project number 647311) is gratefully acknowledged.
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