Visible-to-Near-IR Wide-Range Light Harvesting by Interfacial Charge-Transfer Transitions between TiO2 and p-Aminophenol and Evidence of Direct Electron Injection to the Conduction Band of TiO2

2017 ◽  
Vol 121 (34) ◽  
pp. 18710-18716 ◽  
Author(s):  
Jun-ichi Fujisawa ◽  
Takumi Eda ◽  
Giacomo Giorgi ◽  
Minoru Hanaya
Keyword(s):  
Charge Transfer ◽  
Conduction Band ◽  
Light Harvesting ◽  
Electron Injection ◽  
Interfacial Charge Transfer ◽  
Near Ir ◽  
Wide Range ◽  
Charge Transfer Transitions ◽  
Interfacial Charge

scholarly journals Improving Interfacial Charge-Transfer Transitions in Nb-Doped TiO2 Electrodes with 7,7,8,8-Tetracyanoquinodimethane

Catalysts ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 367 ◽  
Author(s):  
Reo Eguchi ◽  
Yuya Takekuma ◽  
Tsuyoshi Ochiai ◽  
Morio Nagata
Keyword(s):  
Charge Transfer ◽  
Electron Transport ◽  
Tio2 Nanoparticles ◽  
Conduction Band ◽  
Charge Separation ◽  
Electron Injection ◽  
Tio2 Electrode ◽  
Interfacial Charge Transfer ◽  
Doped Tio2 ◽  
Interfacial Charge

Interfacial charge-transfer (ICT) transitions involved in charge-separation mechanisms are expected to enable efficient photovoltaic conversions through one-step charge-separation processes. With this in mind, the charge-transfer complex fabricated from TiO2 nanoparticles and 7,7,8,8-tetracyanoquinodimethane (TCNQ) has been applied to dye-sensitized solar cells. However, rapid carrier recombination from the conduction band of TiO2 to the highest occupied molecular orbital (HOMO) of TCNQ remains a major issue for this complex. In this study, to inhibit surface-complex recombinations, we prepared Nb-doped TiO2 nanoparticles with different atomic ratios for enhanced electron transport. To investigate the effects of doping on electron injection through ICT transitions, these materials were examined as photoelectrodes. When TiO2 was doped with 1.5 mol % Nb, the Fermi level of the TiO2 electrode shifted toward the conduction band minimum, which improved electron back-contact toward the HOMO of TCNQ. The enhancement in electron transport led to increases in both short circuit current and open circuit voltage, resulting in a slight (1.1% to 1.3%) improvement in photovoltaic conversion efficiency compared to undoped TiO2. Such control of electron transport within the photoelectrode is attributed to improvements in electron injection through ICT transitions.

Interfacial charge-transfer transitions in a TiO2-benzenedithiol complex with Ti–S–C linkages

2015 ◽  
Vol 17 (44) ◽  
pp. 29867-29873 ◽  
Author(s):  
Jun-ichi Fujisawa ◽  
Ryuki Muroga ◽  
Minoru Hanaya
Keyword(s):  
Charge Transfer ◽  
Visible Light ◽  
Room Temperature ◽  
Light Response ◽  
Interfacial Charge Transfer ◽  
Visible Light Response ◽  
Charge Transfer Transitions ◽  
Interfacial Charge

A visible light response of TiO2 due to interfacial charge-transfer transitions was obtained by the addition of benzenedithiol at room temperature.

Facile interfacial charge transfer across hole doped cobalt-based MOFs/TiO2 nano-hybrids making MOFs light harvesting active layers in solar cells

2015 ◽  
Vol 3 (45) ◽  
pp. 22669-22676 ◽  
Author(s):  
Deok Yeon Lee ◽  
Iseul Lim ◽  
Chan Yong Shin ◽  
Supriya A. Patil ◽  
Wonjoo Lee ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Solar Radiation ◽  
Light Harvesting ◽  
Hole Doping ◽  
Interfacial Charge Transfer ◽  
Active Layers ◽  
Interfacial Charge

Hole doping leads to an efficient photo-induced interfacial charge transfer from MOFs to TiO2 and thereby the MOFs can harvest solar radiation to generate electricity.

scholarly journals Interfacial charge-transfer transitions in SnO2 functionalized with benzoic acid derivatives

RSC Advances ◽  
2021 ◽  
Vol 11 (34) ◽  
pp. 20725-20729
Author(s):  
Jun-ichi Fujisawa ◽  
Minoru Hanaya
Keyword(s):  
Charge Transfer ◽  
Benzoic Acid ◽  
Interfacial Charge Transfer ◽  
Benzoic Acid Derivatives ◽  
Charge Transfer Transitions ◽  
Interfacial Charge

First observation of interfacial charge-transfer transitions in SnO2.

Sign in / Sign up

Export Citation Format

Share Document