Dynamic Microscopy Study of Ultrafast Charge Transfer in a Hybrid P3HT/Hyperbranched CdSe Nanoparticle Blend for Photovoltaics
Giulia Grancini
Mariano Biasiucci
Rosanna Mastria
Francesco Scotognella
Francesco Tassone
Dario Polli
Giuseppe Gigli
Guglielmo Lanzani
10.1021/jz3000382.ls01
https://acs.figshare.com/articles/media/Dynamic_Microscopy_Study_of_Ultrafast_Charge_Transfer_in_a_Hybrid_P3HT_Hyperbranched_CdSe_Nanoparticle_Blend_for_Photovoltaics/2018361
We present a spectroscopic investigation on a new hyperbranched cadmium selenide nanocrystals (CdSe NC)/poly(3-hexylthiophene) (P3HT) blend, a potentially good active component in hybrid photovoltaics. Combined ultrafast transient absorption spectroscopy and morphological investigations by means of an ultrafast confocal microscope reveal a strong influence of the complex local structure on the photogenerated carrier dynamics. In particular, we map the electron-transfer process across the hybrid NC/polymer interface, and we reveal that charge separation occurs through a preferential pathway from the CdSe nanobranches to the P3HT chains. Efficient charge generation at the distributed heterojunction is also confirmed by scanning kelvin probe force microscopy measurements.
2015-12-16 20:59:09
Hybrid P 3HT CdSe Nanoparticle
P 3HT chains
Ultrafast Charge Transfer
absorption spectroscopy
photogenerated carrier dynamics
NC
charge separation
spectroscopic investigation
P 3HT blend
Dynamic Microscopy Study
ultrafast confocal microscope
Efficient charge generation
scanning kelvin probe force microscopy measurements
hyperbranched cadmium selenide nanocrystals
CdSe nanobranches