Methylammonium lead iodide (MAPbI) perovskite quantum dots (QDs) have become one of the most promising materials for optoelectronics. Understanding the dynamics of the charge transfer from MAPbI QDs to the charge transport layer (CTL) is critical for improving the performance of MAPbI QD photoelectronic devices. However, there is currently less consensus on this. In this study, we used an ultrafast transient absorption (TA) technique to investigate the dynamics of charge transfer from MAPbI QDs to CTL titanium dioxide (TiO), elucidating the dependence of these kinetics on QD size with an injection rate from 1.6 × 10 to 4.3 × 10 s. A QD solar cell based on MAPbI/TiO junctions with a high-power conversion efficiency (PCE) of 11.03% was fabricated, indicating its great potential for application in high-performance solar cells.
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| http://dx.doi.org/10.3390/nano13071292 | DOI Listing |
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