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- W2890117741 abstract "Fullerenes have been widely used as the electron transport layers (ETL) for planar-heterojunction perovskite solar cells (PSCs), due to their superior abilities in electron transporting, hysteresis suppression and low-temperature processing. Here, we demonstrate a novel inverted PSC with evaporated C60 as ETL and dopant-free copper phthalocyanine (CuPc) as hole transport layer (HTL). The C60 ETL can not only transport photogenerated electrons, but also passivate grain boundaries and surfaces of perovskite films effectively. By optimizing the thickness of the C60 ETL, a champion power conversion efficiency (PCE) of 16.72% is obtained with almost no hysteresis and less than 10% decay in efficiency is observed during a two-week stability test. To the best of our knowledge, this is the highest efficiency of the inverted PSCs employing CuPc as HTL. For comparison, the devices using PCBM as ETL are also prepared and only achieve a highest efficiency of 15.74%. Various characterizations and analyses attest the enhanced charge transport and extraction as well as suppressed charge recombination and hysteresis for the C60-based devices. Since all the processes are accomplished under a low temperature, this enable us to fabricate flexible PSCs on polyethylene terephthalate (PET) substrates with a highest PCE of 12.96%. Our work provides a new strategy for fabricating cost-effective, highly efficient and hysteresis-free flexible PSCs in mass production." @default.
- W2890117741 created "2018-09-27" @default.
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- W2890117741 date "2018-10-01" @default.
- W2890117741 modified "2023-10-13" @default.
- W2890117741 title "Novel efficient C60-based inverted perovskite solar cells with negligible hysteresis" @default.
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- W2890117741 doi "https://doi.org/10.1016/j.electacta.2018.09.004" @default.
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