In recent years, due to their high photo-to-electric power conversion efficiency(PCE)(up to 23%(certified)) and low cost, perovskite solar cells(PSCs) have attracted a great deal of attention in photovoltaics field. T...In recent years, due to their high photo-to-electric power conversion efficiency(PCE)(up to 23%(certified)) and low cost, perovskite solar cells(PSCs) have attracted a great deal of attention in photovoltaics field. The high PCE can be attributed to the excellent physical properties of organic–inorganic hybrid perovskite materials, such as a long charge diffusion length and a high absorption coefficient in the visible range. There are different diffusion lengths of holes in electrons in a PSC device, and thus the electron transporting layer(ETL) plays a critical role in the performance of PSCs. An alternative for TiO2, to the most common ETL material is SnO2, which has similar physical properties to TiO2 but with much higher electron mobility, which is beneficial for electron extraction. In addition, there are many facile methods to fabricate SnO2 nanomaterials with low cost and low energy consumption. In this review paper, we focus on recent developments in SnO2 as the ETL of PSCs. The fabrication methods of SnO2 materials are briefly introduced. The influence of multiple Sn O2 types in the ETL on the performance of PSCs is then reviewed. Different methods for improving the PCE and long-term stability of PSCs based on SnO2 ETL are also summarized. The review provides a systematic and comprehensive understanding of the influence of different Sn O2 ETL types on PSC performance and potentially motivates further development of PSCs with an extension to SnO2-based PSCs.展开更多
To meet the challenge of continuously increasing global energy demands,organic-inorganic halide based perovskite solar cells(PSCs) have garnered great attention from the photovoltaic research community for their low c...To meet the challenge of continuously increasing global energy demands,organic-inorganic halide based perovskite solar cells(PSCs) have garnered great attention from the photovoltaic research community for their low cost and high efficiency.The efficiency of perovskite-based mesoscopic solar cells increases rapidly,from 3.8%in 2009 to22.1%in 2016.N-type metal-oxide electron transport layer,as one of the important components in mesoscopic PSCs(MPSCs),acts as not only a scaffold layer for the growth of perovskite crystals,but also a layer to supply transfer pathways for electrons injected from perovskites.In this review,we discussed recent published reports of MPSCs with the focus on n-type metal-oxide electron transport layer in MPSCs.The scaffold materials,scaffold nanostructure,and scaffold/perovskite interface engineering are considered,and the effects of these modifications of scaffolds on the performance of MPSCs are summarized in this review.展开更多
基金supported by the National Natural Science Foundation of China(NSFC 61574009 and 11574014)
文摘In recent years, due to their high photo-to-electric power conversion efficiency(PCE)(up to 23%(certified)) and low cost, perovskite solar cells(PSCs) have attracted a great deal of attention in photovoltaics field. The high PCE can be attributed to the excellent physical properties of organic–inorganic hybrid perovskite materials, such as a long charge diffusion length and a high absorption coefficient in the visible range. There are different diffusion lengths of holes in electrons in a PSC device, and thus the electron transporting layer(ETL) plays a critical role in the performance of PSCs. An alternative for TiO2, to the most common ETL material is SnO2, which has similar physical properties to TiO2 but with much higher electron mobility, which is beneficial for electron extraction. In addition, there are many facile methods to fabricate SnO2 nanomaterials with low cost and low energy consumption. In this review paper, we focus on recent developments in SnO2 as the ETL of PSCs. The fabrication methods of SnO2 materials are briefly introduced. The influence of multiple Sn O2 types in the ETL on the performance of PSCs is then reviewed. Different methods for improving the PCE and long-term stability of PSCs based on SnO2 ETL are also summarized. The review provides a systematic and comprehensive understanding of the influence of different Sn O2 ETL types on PSC performance and potentially motivates further development of PSCs with an extension to SnO2-based PSCs.
基金supported by the National Natural Science Foundation of China(91433203 and 61474049)the Ministry of Science and Technology of China(2015AA034601)+1 种基金the 111 Project(B07038)the Science and Technology Department of Hubei Province(2013BAA090)
文摘To meet the challenge of continuously increasing global energy demands,organic-inorganic halide based perovskite solar cells(PSCs) have garnered great attention from the photovoltaic research community for their low cost and high efficiency.The efficiency of perovskite-based mesoscopic solar cells increases rapidly,from 3.8%in 2009 to22.1%in 2016.N-type metal-oxide electron transport layer,as one of the important components in mesoscopic PSCs(MPSCs),acts as not only a scaffold layer for the growth of perovskite crystals,but also a layer to supply transfer pathways for electrons injected from perovskites.In this review,we discussed recent published reports of MPSCs with the focus on n-type metal-oxide electron transport layer in MPSCs.The scaffold materials,scaffold nanostructure,and scaffold/perovskite interface engineering are considered,and the effects of these modifications of scaffolds on the performance of MPSCs are summarized in this review.
