| Autor: |
Deng, Shibin, Snaider, Jordan M., Gao, Yao, Shi, Enzheng, Jin, Linrui, Schaller, Richard D., Dou, Letian, Huang, Libai |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 1/28/2020, Vol. 152 Issue 4, p1-7, 7p, 4 Graphs |
| Abstrakt: |
Rational design of heterojunctions using nanostructured materials is a useful strategy for achieving efficient interfacial charge separation in photovoltaics. Heterojunctions can be constructed between the organic ligands and the inorganic layers in two-dimensional perovskites, taking advantage of their highly programmable structures. Here, we investigate charge transfer and recombination at the interface between the thiophene-based semiconducting ligands and the lead halide inorganic sublattices using time-resolved photoluminescence and transient reflection spectroscopy in single two-dimensional perovskite crystals. These measurements demonstrate the charge transfer time around 10 ps and long-lived charge-separated state over the nanosecond time scale in two-dimensional ligand-perovskite heterostructures. The efficient charge transfer processes coupled with slow charge recombination suggest the potential for improving exciton dissociation and charge transport in two-dimensional perovskite solar cells. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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