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Ren, Ziqiu; Wang, Na; Zhu, Menghua; Li, Xin; Qi, Jingyao
Electrochimica acta, 08/2018, Letnik: 282Journal Article
The simple assembling process and lower manufacturing cost are crucial for wide application of perovskite solar cells. In this work, we report an efficient interface passivation strategy for preparing high-performance planar perovskite solar cells, which does not require well-controlled moisture and oxygen atmosphere. A NH4F solution-based additive is introduced to passivated TiO2 electron transfer layer, which offers reduction of oxygen-induced defects and residual surface hydroxyl groups, and lower trap state level. Using a typical planar structure of FTO/NH4F-TiO2/CH3NH3PbI3/Spiro-OMeTAD/Au, the champion device achieves a power conversion efficiency of 15.61%. After 28-day durability test, the device with NH4F-treated TiO2 storing in air without any encapsulation exhibits a little efficiency loss (<10%). Our work demonstrates a generic approach to develop air-processed efficient planar perovskite solar cells by interface engineering for future commercialization. Display omitted •A NH4F additive is introduced to passivated TiO2 electron transfer layer.•The oxygen-induced defects and residual hydroxyls at interface are suppressed.•The air-processed device achieves a power conversion efficiency of 15.61%.•The NH4F-treated device storing in air exhibits a little efficiency loss.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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