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首页> 外文期刊>Advanced functional materials >Synergistic Effect between NiO_x and P3HT Enabling Efficient and Stable Hole Transport Pathways for Regular Perovskite Photovoltaics
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Synergistic Effect between NiO_x and P3HT Enabling Efficient and Stable Hole Transport Pathways for Regular Perovskite Photovoltaics

机译：Synergistic Effect between NiO_x and P3HT Enabling Efficient and Stable Hole Transport Pathways for Regular Perovskite Photovoltaics

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摘要

As an inorganic hole transport material (HTM), nickel O_xide (NiO_x) is widelyused in perovskite solar cells (PSCs) due to its low cost and intrinsic stability.However, on account of its poor film formation on perovskite, the low powerconversion efficiency (PCE) and stability of regular NiO_x-based PSCs is a mainobstacle for commercialization. Here, a solution-processed inorganic/organichybrid hole transporting system is developed to resolve this issue, therebyimproving the PCE from 16.0% to 21.2%. Poly(3-hexylthiophene) (P3HT) isstudied as the typical case, revealing that the performance improvementmainly lies in the synergistic interaction between NiO_x and P3HT: 1) the introductionof P3HT improves assembly regularity and film uniformity of NiO_x; 2)electron redistribution between P3HT and NiO_x increases the Ni~(3+)/Ni~(2+) ratiofor higher hole mobility; 3) the feed-back impact of NiO_x on P3HT enhancesmolecular orientation of polymer chains in P3HT for better hole transportthrough polymer framework. Finally, the encapsulated solar cell moduleswith P3HT-promoted NiO_x maintains 91% of the initial efficiency after 1000 haging at a harsh 85 ℃/85% relative humidity condition. This finding providesa feasible approach for using NiO_x-based HTMs to realize high-performanceregular PSCs, paving the way for their commercialization.

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