Effect of Donor-Acceptor Concentration Ratios on Non-Radiative Energy Transfer in Zero-Dimensional Cs4PbBr6 Perovskite/MEH-PPV Nanocomposite Thin Films

Abstract

Composite materials with different concentration ratios of a hybrid of zero-dimensional (0-D) Cs4PbBr6 perovskite, which acts as a donor (D), and poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV), which acts as an acceptor (A), were successfully prepared via a solution blending method prior to being deposited onto glass substrates by a spin-coating technique. The influence of acceptor content on the structural, optical, and energy transfer properties of the donor was investigated. The perovskite nanocrystals formed thin films without any chemical interactions within a matrix of MEH-PPV in the blend. The possibility of dipole–dipole (non-radiative) energy transfer from the 0-D Cs4PbBr6 to the MEH-PPV was proven. The energy transfer parameters such as Ro (critical distance of the energy transfer), kapp (apparent quenching constant), ∅ D A (quantum yield of D in the presence of A), τ D A (lifetime of D in the presence of A), PDA (probability of energy transfer), η (efficiency of energy transfer), RDA (energy transfer radius), kET (energy transfer rate constant), TDR (total decay rate), Ao (critical concentration of A), and Aπ (conjugation length) were calculated based on the absorption and emission measurements.

Reducing Amplified Spontaneous Emission Threshold in CsPbBr3 Quantum Dot Films by Controlling TiO2 Compact Layer

“…The figures indicate that QDs were successfully grown. This is further confirmed by the measured XRD patterns shown in Figure 1 c. A set of distinct peaks located at approximately that correspond, respectively, to diffractions from (100), (110), (200), (210), (211) and (220) planes of the perovskite cubic structure [ 12 , 19 , 23 , 24 , 31 ]. Interestingly, there are clearly some differences in the sharpnesses of XRD peaks.…”

“…This can be done by calculating the output intensity by integrating the spectrograph counts across the emission spectrum and then normalizing to create a degradation curve. perovskite cubic structure [12,19,23,24,31]. Interestingly, there are clearly some differences in the sharpnesses of XRD peaks.…”

Triplet Energy Transfer Mechanism of Ternary Organic Hybrid Thin Films of PFO/MEH-PPV/CsPbBr3 Perovskite Quantum Dots

“…To prevent intermolecular transfer in the donor (PFO), the concentration of the acceptor (PQDs and MEH-PPV) should be limited, specifically less than A o [13,28], where A o is the concentration of the acceptor at which 76% of the energy could be transferred. In Case I, A o of MEH-PPV decreased in the range of 0.57-0.39 mM with the addition of PQDs, as shown in Table 1.…”

“…Hence, an appropriate donor/acceptor combination is crucial to achieving FRET-based OLEDs with high performance. In our recent reports, appropriate donor/acceptor combinations, such as PFO/MEH-PPV [ 12 ], Cs 4 PbBr 6 /MEH-PPV [ 13 ], and PFO/CsPbBr 3 perovskite quantum dots (PQDs) [ 14 ], were employed to achieve efficient FRET.…”

Photophysical Properties of the PVK-MEH-PPV/PCBM Composite for Organic Solar Cells Application: Synthesis, Characterization and Computational Study

“…Actually, it has been reported that the architectures of the most efficient photovoltaic cells use alternating donor-acceptor groups [8][9][10][11][12][13], mainly for their good thermal stability. In this context, poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) is a semiconducting polymer of interest [14][15][16], one that has been widely studied for the development of a P-N junction with [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) [17][18][19]. However, fullerene and its derivatives, particularly PCBMs, are becoming an interesting candidate for organic optoelectronics thanks to their advantageous properties, mainly their quantum yield at high fluorescence along with their good thermal stability [20][21][22].…”