Theory of Charge Transfer Reaction Process at the Sensitizers Molecule Dye N3 Contact with MgO Semiconductor

2021 ◽  
Vol 900 ◽  
pp. 94-102
Author(s):  
Nada Adnan Sabri ◽  
Hadi J.M. Al-Agealy
Keyword(s):  
Dielectric Constant ◽  
Refractive Index ◽  
Charge Transfer ◽  
Transfer Rate ◽  
Chemical Potential ◽  
Transition Energy ◽  
Charge Transfer Reaction ◽  
Coupling Constant ◽  
Energy Potential ◽  
Charge Transfer Rate

A theoretical charge transport rate approach has taken to study the charge transfer properties in non-homogeneous N3-MgO systems. It develops at the fully quantum transition theory by means of transition energy, potential, driving energy and coupling constant. It is obtained that transition energy is determined by the donor acceptor scenario, dependent on the radii of N3 and MgO, dielectric constant and refractive index of solvents. The transition energy of charge carriers increased with increased dielectric constant and decreased refractive index of solvents. Transition energy of N3-MgO system reach to top with methanol (0.582 ev) and has minimum with Chlorobenzene (0.104eV). Dependences of the driving energy versus chemical potential of N3 dye and conduction band of semiconductor with potential barrier, the charge transfer rate are increased with decreased driving force of system. It is established that increased coupling constant factor reduces to increased charge transfer rate.

scholarly journals Study on Redox Behaviour of Dopamine and its Complexes with Cu (II) and Mg (II) ions

1970 ◽  
Vol 4 (2) ◽  
Author(s):  
ME Quayum ◽  
RJ Mannan ◽  
K Nahar
Keyword(s):  
Aqueous Solution ◽  
Charge Transfer ◽  
Transfer Rate ◽  
Transfer Reaction ◽  
Platinum Electrode ◽  
Charge Transfer Reaction ◽  
Redox Behaviour ◽  
Charge Transfer Rate ◽  
Dopamine Hydrochloride ◽  
Pure Metals

The complexations of dopamine with Cu (II) and Mg (II) ions and their redox behaviour have been studied in aqueous solution using electrochemical methods such as, cyclic voltammetry (CV) and chrono coulometry (CC). The redox behaviour of Cu (II) and Mg (II) ions in absence and in presence of dopamine has been investigated. Dopamine hydrochloride (DPH) shows a two-electron transfer quasi-reversible charge transfer reaction on platinum electrode and similar redox behaviour was observed in case of Mg (II). A two-step redox process is observed for Cu (II) in aqueous solution. The values of charge transfer rate constants for the ligand DPH and for pure metals Cu (II) and Mg (II) are higher than those of Cu (II)–DPH and Mg (II)-DPH system indicating considerable complexation. CC data was analyzed to evaluate the extent of adsorption of the reactants or products on the surface. Key words: Complexation, Adsorption, Redox behaviour, Charge transfer Dhaka Univ. J. Pharm. Sci. Vol.4(2) 2005 The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website

Connecting charge transfer kinetics to device parameters of a narrow-bandgap polymer-based solar cell

2016 ◽  
Vol 18 (38) ◽  
pp. 26550-26561 ◽  
Author(s):  
Jongwoo Song ◽  
Younah Lee ◽  
Boa Jin ◽  
Jongdeok An ◽  
Hyunmin Park ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Solar Cell ◽  
Kinetic Model ◽  
Rate Constant ◽  
Transfer Rate ◽  
Polymer Solar Cell ◽  
Transfer Rate Constant ◽  
Charge Transfer Rate ◽  
Narrow Bandgap

The spectroscopic charge transfer rate constant was compared with the PV properties of a polymer solar cell using a kinetic model.

scholarly journals Influence of the Potential on the Charge-Transfer Rate Constant of Photooxidation of Water over α-Fe2O3 and Ti-Doped α-Fe2O3

2013 ◽  
Vol 29 (09) ◽  
pp. 1954-1960
Author(s):  
SHANGGUAN Peng-Peng ◽  
◽  
TONG Shao-Ping ◽  
LI Hai-Li ◽  
LENG Wen-Hua ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Rate Constant ◽  
Transfer Rate ◽  
Transfer Rate Constant ◽  
Charge Transfer Rate

NiO nanowires as hole-transfer layer for drastic enhancement of CdSe-sensitized photocathodes

2019 ◽  
Vol 43 (10) ◽  
pp. 4075-4081
Author(s):  
Shuang Zhao ◽  
Yuming Dong ◽  
Guangli Wang ◽  
Pingping Jiang ◽  
Yuxia Zhang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Transfer Rate ◽  
Capture Efficiency ◽  
Transfer Layer ◽  
Hole Transfer ◽  
Charge Transfer Rate ◽  
Light Capture

Grass-like NiO nanowires as a hole-transfer layer to improve light capture efficiency and charge transfer rate for a CdSe-sensitized photocathode.

Charge Transfer Rate in Collisions of H+Ions with Si Atoms

1996 ◽  
Vol 473 (2) ◽  
pp. 1114-1117 ◽  
Author(s):  
M. Kimura ◽  
A. B. Sannigrahi ◽  
J. P. Gu ◽  
G. Hirsch ◽  
R. J. Buenker ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Transfer Rate ◽  
Charge Transfer Rate

Photosynthetic Reaction Center Immobilization through Carboxylic Acid Terminated\Cytochrome C Linker for Applications in Photoprotein-based Bio-photovoltaic Devices

2013 ◽  
Vol 1572 ◽  
Author(s):  
Houman Yaghoubi ◽  
Daniel Jun ◽  
J. Thomas Beatty ◽  
Arash Takshi
Keyword(s):  
Charge Transfer ◽  
Carboxylic Acid ◽  
Transfer Rate ◽  
Internal Quantum Efficiency ◽  
Direct Electron Transfer ◽  
Cysteine Residues ◽  
Photovoltaic Devices ◽  
Au Electrode ◽  
Charge Transfer Rate ◽  
Linker Molecules

ABSTRACTBacterial photosynthetic reaction centers (RCs) are promising materials for solar energy harvesting, due to their high internal quantum efficiency. However, applications of RCs in bio-photovoltaic devices so far show relatively low external power conversion efficiency, mainly due to low efficiency of the charge transfer to the electrode. Preferential orientation of RCs on an electrode’s surface can enhance the charge transfer rate to some extent. Yet, the results of direct coupling of RCs to an Au electrode, through cysteine residues from the H-subunit, revealed that direct electron transfer is not efficient. This work focuses on a different approach to achieve high charge transfer rate between an Au electrode and RC protein complexes by employing cytochrome c (Cyt c)\carboxylic acid-terminated linker molecules. This approach preferentially orients RCs with the primary donor site to the electrode. Furthermore, Cyt c can be considered as a conductive linker, while the charge transfer mechanism through carboxylic acid-terminated linker molecules is dominated by tunneling. The photochronoamperometric results for a two electrode cell setup indicated a 156 nA.cm-2 cathodic photocurrent density; the photocurrent was measured in an electrochemical cell with ubiquinone-10 (Q2) in the electrolyte. Negligible photocurrents were observed in the case of coupled RCs to the Au via cysteine residues on H-subunit, with only Cyt c in the electrolyte. These findings contribute to the design of highly efficient bio-photovoltaic devices.

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