4 years ago

Metal Oxides as Efficient Charge Transporters in Perovskite Solar Cells

Metal Oxides as Efficient Charge Transporters in Perovskite Solar Cells
Md Azimul Haque, Xinwei Guan, Tom Wu, Arif D. Sheikh
Over the past few years, hybrid halide perovskites have emerged as a highly promising class of materials for photovoltaic technology, and the power conversion efficiency of perovskite solar cells (PSCs) has accelerated at an unprecedented pace, reaching a record value of over 22%. In the context of PSC research, wide-bandgap semiconducting metal oxides have been extensively studied because of their exceptional performance for injection and extraction of photo-generated carriers. In this comprehensive review, we focus on the synthesis and applications of metal oxides as electron and hole transporters in efficient PSCs with both mesoporous and planar architectures. Metal oxides and their doped variants with proper energy band alignment with halide perovskites, in the form of nanostructured layers and compact thin films, can not only assist with charge transport but also improve the stability of PSCs under ambient conditions. Strategies for the implementation of metal oxides with tailored compositions and structures, and for the engineering of their interfaces with perovskites will be critical for the future development and commercialization of PSCs. Hybrid perovskites are emerging as promising materials for low-cost photovoltaic technologies with high performance. Wide-bandgap metal oxides in the forms of nanostructures and compact thin films have been extensively applied as electron and hole transporters in perovskite solar cells. This review elucidates their crucial role in assisting perovskite solar cells to achieve optimal performance and stability.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/aenm.201602803

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