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Exploration of donor effect on electron injection and photovoltaic properties of chalcone derivatives

Irfan A.

Materials Science Poland

2018

Vol. 36, No. 2

276--282

Various photovoltaic parameters, i.e., electron injection (ΔGinject.), electronic coupling constants (|VRP|), light harvesting efficiencies (LHE), band alignment and electronic properties of five chalcone derivatives were studied by density functional theory (DFT) and time domain. The light was also shed on the effect of different electron donating groups and their strength intensity on the electronic and charge transfer properties. The balanced hole and electron reorganization energies for Comp 4 showed that it might have better ambipolar charge transfer in nature. The strong electron donating group(s) usually enhance(s) the ΔGinject. and |VRP| of chalcones as -N(CH3)2 > OCH3 > OH. Additionally, ΔGinject. and |VRP| of various substituted chalcone derivatives have been observed as trimethoxy > dimethoxy > monomethoxy. The greater electron donating ability of substituents is also favorable for the staggered band alignment. The superior ΔGinject. of all the studied chalcones than of the referenced compounds disclosed that the prior compounds would be proficient photovoltaic materials.

Generation and transport of laser-induced electron burst for a new diagnostic of Hall plasma thruster

Gilbert T., Leufroy A., Lazurenko A., Bouchoule A.

Journal of Technical Physics

2008

Vol. 49, no 2

143-161

The Hall thrusters are developed in the field of spatial mission or satellite trajectories control. These thrusters are based on ejection of the ions from a E x B discharge. The physical understanding involves a lot of parameters. It is still today not fully controlled. Particularly, the electronic transport represents a challenge in the theoretical and experimental domains. This work presents the second part of an original diagnosis of electrons transport.