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E-beam evaporated Nb2O5 film is directly used as an effective electron transport layer (ETL) for perovskite solar cells without needing any posttreatment. The effect of Nb2O5 thickness on optical and electronic properties of the perovskite layer deposited thereupon are studied in detail. It is found that 60nm thick Nb2O5 ETL delivers the best photovoltaic performance with PCE as high as 18.59%. In...
The effect of transparent conductive oxide (TCO) on the performance of compact-layer free perovskite solar cells has been investigated. The results show that the perovskite film formation, charge transfer and charge recombination are affected by the TCO layer. All common TCOs, including ITO, FTO and AZO, show some beneficial and detrimental characters for solar cell application. Finally, the compact-layer...
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