Ternary hybrid systems of P3HT–CdSe–WS₂nanotubes for photovoltaic applications

Abstract

Hybrid heterojunctions of conjugated polymers and inorganic nanomaterials are a promising combination for obtaining high performance solar cells (SC). In this work we have explored new possible uses of the WS2 nanotubes (NTs) both as the only acceptor material blended with a polymer and in ternary systems mixed with a polymer and quantum dots (QDs). In particular we have spectroscopically investigated binary blends of poly(3-hexylthiophene) (P3HT) and WS2 NTs, P3HT and CdSe QDs, and ternary blends of P3HT, CdSe QDs and WS2 NTs. We report fluorescence quenching effects of the QD signal in the P3HT-CdSe-WS2 system with the increase of NT concentration. Static and time-resolved fluorescence studies reveal efficient resonant energy transfer from the QDs to the NTs upon photoexcitation. The evidence of energetic interaction between WS2 NTs and QDs opens new fields of application of WS2 NTs and holds very promising potential for improving charge transfer phenomena in the active layer of hybrid solar cells.

Hybrid nanostructures of metal/two-dimensional nanomaterials for plasmon-enhanced applications

“…Other 2D materials have also been used as active layers of solar cells, such as MoS 2 , 410 and WS 2 . [411][412][413] 4.3.2 PDs. A PD is a photoelectronic device used for the detection of light.…”

PbS nanocrystals in hybrid systems for solar cell applications

“…Moreover, the energy level alignment between P3HT and PbS NCs is not particularly favorite. There is a small energy difference between the valence band (−5.2 eV) of PbS(EDT) and the highest occupied molecular orbital (HOMO) (−5.1 eV) of P3HT while the PbS(EDT) conduction band and the P3HT lowest unoccupied molecular orbital (LUMO) values are −3.8 and −3.2 eV, respectively. These values suggest that the use of a low band gap polymer may constitute a more favorable charge transport and ultimately give rise to higher PCE hybrid cells.…”

Spectroscopic investigation of flame synthesized carbon nanoparticle/P3HT blends

“…The temporal reconstruction of the signal was obtained through a micrometrically precise delay line on the gate beam. The resolution of the system was measured as 150 fs [26,27]. Sample degradation was avoided by performing measurements under flowing nitrogen and using a translation stage to move the sample within the beam, removing the effect of photo bleaching and providing data averaged over the entire sample.…”