Photoinduced hole transfer in QD-phthalocyanine hybrids.
作者： M. Arvani , K. Virkki , F. Abou-Chahine , A. Efimov , A. Schramm
DOI: 10.1039/C6CP04374G
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摘要: A series of CdSe quantum dot (QD)–phthalocyanine (Pc) hybrids were synthesized and their photophysics was studied using steady state time-resolved spectroscopic methods. Emission QDs progressively quenched upon increasing the concentration Pc in hybrids. detailed transient absorption study revealed that mechanism quenching is charge separation, resulting formation with negatively charged cation. Direct photo-excitation did not show any detectable interaction between excited QD to which it attached. An explanation proposed, based on suggestion energy lowest unoccupied molecular orbital (LUMO) lower than edge conduction band, while highest occupied (HOMO) sufficiently higher high valence band (VB), thus permitting hole transfer from VB HOMO after QDs.
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