Photoredox-active Dyads Based on a Ru(II) Photosensitizer Equipped with Electron Donor or Acceptor Polymer Chains: A Spectroscopic Study of Light-Induced Processes toward Efficient Charge Separation

2015 ◽  
Vol 119 (9) ◽  
pp. 4742-4751 ◽  
Author(s):  
Joachim Kübel ◽  
Robert Schroot ◽  
Maria Wächtler ◽  
Ulrich S. Schubert ◽  
Benjamin Dietzek ◽  
...  
Keyword(s):  
Spectroscopic Study ◽  
Electron Donor ◽  
Charge Separation ◽  
Polymer Chains ◽  
Efficient Charge

scholarly journals Carbon Nanodots as a Potential Transport Layer for Boosting Performance of All-Inorganic Perovskite Nanocrystals-based Photodetector

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 717
Author(s):  
Hassan Algadi ◽  
Ahmad Umar ◽  
Hasan Albargi ◽  
Turki Alsuwian ◽  
Sotirios Baskoutas
Keyword(s):  
Charge Separation ◽  
High Performance ◽  
Band Alignment ◽  
Transport Layer ◽  
Carbon Nanodots ◽  
Separation Mechanism ◽  
Perovskite Layer ◽  
Inorganic Perovskite ◽  
Highly Efficient ◽  
Efficient Charge

A low-cost and simple drop-casting method was used to fabricate a carbon nanodot (C-dot)/all-inorganic perovskite (CsPbBr3) nanosheet bilayer heterojunction photodetector on a SiO2/Si substrate. The C-dot/perovskite bilayer heterojunction photodetector shows a high performance with a responsivity (R) of 1.09 A/W, almost five times higher than that of a CsPbBr3-based photodetector (0.21 A/W). In addition, the hybrid photodetector exhibits a fast response speed of 1.318/1.342 µs and a highly stable photocurrent of 6.97 µA at 10 V bias voltage. These figures of merits are comparable with, or much better than, most reported perovskite heterojunction photodetectors. UV–Vis absorption and photoluminescent spectra measurements reveal that the C-dot/perovskite bilayer heterojunction has a band gap similar to the pure perovskite layer, confirming that the absorption and emission in the bilayer heterojunction is dominated by the top layer of the perovskite. Moreover, the emission intensity of the C-dot/perovskite bilayer heterojunction is less than that of the pure perovskite layer, indicating that a significant number of charges were extracted by the C-dot layer. The studied band alignment of the C-dots and perovskites in the dark and under emission reveals that the photodetector has a highly efficient charge separation mechanism at the C-dot/perovskite interface, where the recombination rate between photogenerated electrons and holes is significantly reduced. This highly efficient charge separation mechanism is the main reason behind the enhanced performance of the C-dot/perovskite bilayer heterojunction photodetector.

scholarly journals Efficient charge separation and visible-light response in bilayer HfS2-based van der Waals heterostructures

RSC Advances ◽  
2018 ◽  
Vol 8 (34) ◽  
pp. 18889-18895 ◽  
Author(s):  
Biao Wang ◽  
Xukai Luo ◽  
Junli Chang ◽  
Xiaorui Chen ◽  
Hongkuan Yuan ◽  
...  
Keyword(s):  
Charge Separation ◽  
Density Functional ◽  
Van Der Waals ◽  
Light Response ◽  
Hybrid Density Functional Theory ◽  
Functional Theory ◽  
Visible Light Response ◽  
Efficient Charge ◽  
Hybrid Density Functional ◽  
Photocatalytic Applications

In this work, we employ hybrid density functional theory to investigate HfS2-based van der Waals (vdW) heterojunctions for highly efficient photovoltaic and photocatalytic applications.

scholarly journals Understanding the anatase–rutile phase junction in charge separation and transfer in a TiO2 electrode for photoelectrochemical water splitting

2016 ◽  
Vol 7 (9) ◽  
pp. 6076-6082 ◽  
Author(s):  
Ailong Li ◽  
Zhiliang Wang ◽  
Heng Yin ◽  
Shengyang Wang ◽  
Pengli Yan ◽  
...  
Keyword(s):  
Water Splitting ◽  
Charge Separation ◽  
Rutile Phase ◽  
Interface Structure ◽  
Photoelectrochemical Water Splitting ◽  
Tio2 Electrode ◽  
Phase Alignment ◽  
Efficient Charge

The key to phase junctions for efficient charge separation is to consider both the phase alignment and interface structure.

Greatly enhanced photocatalytic activity by organic flexible piezoelectric PVDF induced spatial electric field

2017 ◽  
Vol 7 (23) ◽  
pp. 5594-5601 ◽  
Author(s):  
Baoying Dai ◽  
Hengming Huang ◽  
Wei Wang ◽  
Yukai Chen ◽  
Chunhua Lu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Electric Field ◽  
Charge Separation ◽  
High Photocatalytic Activity ◽  
Efficient Charge ◽  
Vital Factor

Efficient charge separation accelerated by a spatial electric field is a vital factor for semiconductor photocatalysts to achieve high photocatalytic activity.

scholarly journals Regulation of Ferroelectric Polarization to Achieve Efficient Charge Separation and Transfer in Particulate RuO 2 /BiFeO 3 for High Photocatalytic Water Oxidation Activity

Small ◽  
2021 ◽  
Vol 17 (3) ◽  
pp. 2007044
Author(s):  
Jafar H. Shah ◽  
Biaohong Huang ◽  
Ahmed M. Idris ◽  
Yong Liu ◽  
Anum S. Malik ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Charge Separation ◽  
Ferroelectric Polarization ◽  
Oxidation Activity ◽  
Efficient Charge
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