Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. Recommanded Product: 52409-22-0. Introducing a new discovery about 52409-22-0, Name is Pd2(DBA)3
Enhancing the photovoltaic properties of low bandgap terpolymers based on benzodithiophene and phenanthrophenazine by introducing different second acceptor units
Two novel donor-acceptor (D-A) type random conjugated terpolymers PBDTT-PPzIID and PBDTT-PPzDPP were synthesized by copolymerizing electron-rich alkylthienyl benzodithiophene (BDTT) and two different electron-deficient units, in which phenanthrophenazine (PPz) was the first acceptor unit, and isoindigo (IID) or diketopyrrolopyrrole (DPP) with a strong electron-withdrawing ability was the second acceptor unit, respectively. Compared to their parent polymer PTTPPz-BDTT, a broadening of the band in the long wavelength region from 500 to 850 nm and a significant decrease in HOMO levels were observed for the random terpolymers. Ca and PFN-Br were used as interfacial layers to optimize the devices, respectively. Pleasingly, after replacing Ca/Al with PFN-Br/Al as the cathode, the performance of both polymer devices improved greatly. A maximum power conversion efficiency (PCE) of 5.91% was obtained with a Voc of 0.73 V, a Jsc of 11.75 mA cm-2 and a FF of 68.8% in the PBDTT-PPzDPP/PC71BM-based device, while the PBDTT-PPzIID/PC71BM-based device achieved a PCE of 4.21%. To the best of our knowledge, this is one of the highest recorded FF values among PSCs based on previously reported phenazine copolymers.
Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.Recommanded Product: 52409-22-0, you can also check out more blogs about52409-22-0
Reference£º
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method