| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 63794 | Journal of Energy Chemistry | 2015 | 5 Pages |
The electron transport layer (ETL) plays an important role in planar heterojunction perovskite solar cell (PSCs), by affecting the light-harvesting, electron injection and transportation processes, and especially the crystallization of perovskite absorber. In this work, we utilized a commercial TKD-TiO2 nanoparticle with a small diameter of 6 nm for the first time to prepare a compact ETL by spin coating. The packing of small-size particles endowed TKD-TiO2 ETL an appropriate surface-wettability, which is beneficial to the crystallization of perovskite deposited via solution-processed method. The uniform and high-transmittance TKD-TiO2 films were successfully incorporated into PSCs as ETLs. Further careful optimization of ETL thickness gave birth to a highest power conversion efficiency of 11.0%, which was much higher than that of PSC using an ETL with the same thickness made by spray pyrolysis. This TKD-TiO2 provided a universal solar material suitable for the further large-scale production of PSCs. The excellent morphology and the convenient preparation method of TKD-TiO2 film gave it an extensive application in photovoltaic devices.
Graphical abstractDescription portion: Highly transparent TiO2 nanoparticle (∼ 6 nm) electron transport layer with improved wettability for DMF solvent were successfully used to fabricate planar-heterojunction PSCs with a PCE of 11.0%.Figure optionsDownload full-size imageDownload as PowerPoint slide
