Large impact of reorganization energy on photovoltaic conversion due to interfacial charge-transfer transitions

2015 ◽  
Vol 17 (18) ◽  
pp. 12228-12237 ◽  
Author(s):  
Jun-ichi Fujisawa
Keyword(s):  
Charge Transfer ◽  
Energy Loss ◽  
Charge Separation ◽  
Reorganization Energy ◽  
Separation Mechanism ◽  
Interfacial Charge Transfer ◽  
Photovoltaic Conversion ◽  
Charge Transfer Transitions ◽  
One Step ◽  
Interfacial Charge

Interfacial charge-transfer (ICT) transitions are expected to be a novel charge-separation mechanism for efficient photovoltaic conversion featuring one-step charge separation without energy loss.

Interfacial charge-transfer transitions and reorganization energies in sulfur-bridged TiO2-x-benzenedithiol complexes (x: o, m, p)

2016 ◽  
Vol 18 (32) ◽  
pp. 22286-22292 ◽  
Author(s):  
Jun-ichi Fujisawa ◽  
Ryuki Muroga ◽  
Minoru Hanaya
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Reorganization Energy ◽  
Interfacial Charge Transfer ◽  
Charge Transfer Transitions ◽  
Reorganization Energies ◽  
Interfacial Charge

Sulfur-bridging atoms strongly induce interfacial charge-transfer absorption and reduce the reorganization energy in the electron-injected excited state.

scholarly journals Interfacial Charge-Transfer Transitions for Direct Charge-Separation Photovoltaics

Energies ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2521
Author(s):  
Jun-ichi Fujisawa
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Solar Energy ◽  
Metal Oxide ◽  
Energy Loss ◽  
Energy Absorption ◽  
Charge Separation ◽  
Heterogeneous Interfaces ◽  
Charge Transfer Transitions ◽  
Interfacial Charge

Photoinduced charge separation (PCS) plays an essential role in various solar energy conversions such as photovoltaic conversion in solar cells. Usually, PCS in solar cells occurs stepwise via solar energy absorption by light absorbers (dyes, inorganic semiconductors, etc.) and the subsequent charge transfer at heterogeneous interfaces. Unfortunately, this two-step PCS occurs with a relatively large amount of the energy loss (at least ca. 0.3 eV). Hence, the exploration of a new PCS mechanism to minimize the energy loss is a high-priority subject to realize efficient solar energy conversion. Interfacial charge-transfer transitions (ICTTs) enable direct PCS at heterogeneous interfaces without energy loss, in principle. Recently, several progresses have been reported for ICTT at organic-inorganic semiconductor interfaces by our group. First of all, new organic-metal oxide complexes have been developed with various organic and metal-oxide semiconductors for ICTT. Through the vigorous material development and fundamental research of ICTT, we successfully demonstrated efficient photovoltaic conversion due to ICTT for the first time. In addition, we revealed that the efficient photoelectric conversion results from the suppression of charge recombination, providing a theoretical guiding principle to control the charge recombination rate in the ICTT system. These results open up a way to the development of ICTT-based photovoltaic cells. Moreover, we showed the important role of ICTT in the reported efficient dye-sensitized solar cells (DSSCs) with carboxy-anchor dyes, particularly, in the solar energy absorption in the near IR region. This result indicates that the combination of dye sensitization and ICTT would lead to the further enhancement of the power conversion efficiency of DSSC. In this feature article, we review the recent progresses of ICTT and its application in solar cells.

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.

High-efficiency photocatalytic activity of type II SnO/Sn3O4 heterostructures via interfacial charge transfer

CrystEngComm ◽  
2014 ◽  
Vol 16 (30) ◽  
pp. 6841-6847 ◽  
Author(s):  
Weiwei Xia ◽  
Haibo Wang ◽  
Xianghua Zeng ◽  
Jie Han ◽  
Jun Zhu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Charge Transfer ◽  
Large Scale ◽  
High Efficiency ◽  
Hollow Microspheres ◽  
Type Ii ◽  
Hydrothermal Route ◽  
Interfacial Charge Transfer ◽  
One Step ◽  
Interfacial Charge

Flower-like hollow microspheres were synthesized on a large scale using a one-step hydrothermal route.

Enhanced charge separation and interfacial charge transfer of InGaN nanorods/C3N4 heterojunction photoanode

2019 ◽  
Vol 324 ◽  
pp. 134844 ◽  
Author(s):  
Zhenzhu Xu ◽  
Shuguang Zhang ◽  
Fangliang Gao ◽  
Peng Gao ◽  
Yuefeng Yu ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Charge Separation ◽  
Interfacial Charge Transfer ◽  
Interfacial Charge
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