Back to Search
Start Over
Ultrafast Electron Injection from Photoexcited Perovskite CsPbI 3 QDs into TiO 2 Nanoparticles with Injection Efficiency near 99.
- Source :
-
The journal of physical chemistry letters [J Phys Chem Lett] 2018 Jan 18; Vol. 9 (2), pp. 294-297. Date of Electronic Publication: 2018 Jan 03. - Publication Year :
- 2018
-
Abstract
- Photoexcited electron injection dynamics from CsPbI <subscript>3</subscript> quantum dots (QDs) to wide gap metal oxides are studied by transient absorption spectroscopy. Experimental results show under a low excitation intensity that ∼99% of the photoexcited electrons in CsPbI <subscript>3</subscript> QDs can be injected into TiO <subscript>2</subscript> with a size-dependent rate ranging from 1.30 × 10 <superscript>10</superscript> to 2.10 × 10 <superscript>10</superscript> s <superscript>-1</superscript> , which is also ∼2.5 times faster than that in the case of ZnO. A demonstration QD-sensitized solar cell based on a CsPbI <subscript>3</subscript> /TiO <subscript>2</subscript> electrode is fabricated that delivers a power conversion efficiency of 5%.
Details
- Language :
- English
- ISSN :
- 1948-7185
- Volume :
- 9
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- The journal of physical chemistry letters
- Publication Type :
- Academic Journal
- Accession number :
- 29286666
- Full Text :
- https://doi.org/10.1021/acs.jpclett.7b03062