Abstract
The compact layer plays an important role in conducting electrons and blocking holes in perovskite solar cells (PSCs). Here, we use a two-dimensional titania nanosheet (TNS) thin film as the compact layer in CH3NH3PbI3 PSCs. TNS thin films with thicknesses ranging from 8 to 75 nm were prepared by an electrophoretic deposition method from a dilute TNS/tetrabutylammonium hydroxide solution. The TNS thin films contact the fluorine-doped tin oxide grains perfectly. Our results show that a 8-nm-thick TNS film is sufficient for acting as the compact layer. Currently, the PSC with a TNS compact layer has a high efficiency of 10.7% and relatively low hysteresis behavior.
Original language | American English |
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Pages (from-to) | 15117-15122 |
Number of pages | 6 |
Journal | ACS Applied Materials and Interfaces |
Volume | 7 |
Issue number | 28 |
DOIs | |
State | Published - 2015 |
NREL Publication Number
- NREL/JA-5900-64922
Keywords
- compact layer
- electrophoretic deposition
- perovskite solar cell
- titania nanosheet