Highly Efficient Charge Separation and Collection across in Situ Doped Axial VLS-Grown Si Nanowire p–n Junctions

Nano Letters ◽  
2012 ◽  
Vol 12 (4) ◽  
pp. 1965-1971 ◽  
Author(s):  
A. D. Mohite ◽  
D. E. Perea ◽  
S. Singh ◽  
S. A. Dayeh ◽  
I. H. Campbell ◽  
...  
Keyword(s):  
Charge Separation ◽  
Si Nanowire ◽  
Highly Efficient ◽  
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.

Construction of Hierarchical ZnIn2S4/C3N4 Heterojunction for Enhanced Photocatalytic Degradation of Tetracycline

2022 ◽  
Author(s):  
Feng Min ◽  
Zhengqing Wei ◽  
Zhen Yu ◽  
Yu-Ting Xiao ◽  
Shien Guo ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Organic Contaminants ◽  
Charge Separation ◽  
Active Sites ◽  
In Situ Growth ◽  
Efficient Charge

Both efficient charge separation and sufficiently exposed active sites are critical limiting for solar-driven organic contaminants degradation. Herein, we describe a hierarchical heterojunction photocatalyst fabricated by in situ growth of...

scholarly journals Highly-efficient charge separation and polaron delocalization in polymer–fullerene bulk-heterojunctions: a comparative multi-frequency EPR and DFT study

2013 ◽  
Vol 15 (24) ◽  
pp. 9562 ◽  
Author(s):  
Jens Niklas ◽  
Kristy L. Mardis ◽  
Brian P. Banks ◽  
Gregory M. Grooms ◽  
Andreas Sperlich ◽  
...  
Keyword(s):  
Charge Separation ◽  
Dft Study ◽  
Bulk Heterojunctions ◽  
Highly Efficient ◽  
Efficient Charge

In situ nitrogen-doped hollow-TiO2/g-C3N4 composite photocatalysts with efficient charge separation boosting water reduction under visible light

2017 ◽  
Vol 5 (20) ◽  
pp. 9671-9681 ◽  
Author(s):  
Xiaowei Shi ◽  
Mamoru Fujitsuka ◽  
Zaizhu Lou ◽  
Peng Zhang ◽  
Tetsuro Majima
Keyword(s):  
Visible Light ◽  
Charge Separation ◽  
Alternative Energy ◽  
Energy Utilization ◽  
Nitrogen Doped ◽  
Composite Photocatalysts ◽  
Earth Abundant ◽  
Efficient Charge ◽  
Visible Light Driven

The visible-light-driven water splitting process is highly attractive for alternative energy utilization, while developing efficient, earth-abundant, and environmentally friendly photocatalysts for the hydrogen evolution reaction has remained a major challenge.

Highly efficient charge separation in model Z-scheme TiO2/TiSi2/Si photoanode by micropatterned titanium silicide interlayer

2019 ◽  
Vol 174 ◽  
pp. 237-245 ◽  
Author(s):  
M. Hannula ◽  
H. Ali-Löytty ◽  
K. Lahtonen ◽  
J. Saari ◽  
A. Tukiainen ◽  
...  
Keyword(s):  
Charge Separation ◽  
Titanium Silicide ◽  
Highly Efficient ◽  
Efficient Charge

Efficient Charge Separation of In-Situ Nb-Doped TiO2Nanowires for Photoelectrochemical Water-splitting

2017 ◽  
Vol 2 (9) ◽  
pp. 2822-2827 ◽  
Author(s):  
Zhangliu Tian ◽  
Houlei Cui ◽  
Jijian Xu ◽  
Guilian Zhu ◽  
Feng Shao ◽  
...  
Keyword(s):  
Water Splitting ◽  
Charge Separation ◽  
Photoelectrochemical Water Splitting ◽  
Efficient Charge

A facile in situ approach to fabricate N,S-TiO2/g-C3N4 nanocomposite with excellent activity for visible light induced water splitting for hydrogen evolution

2015 ◽  
Vol 17 (12) ◽  
pp. 8070-8077 ◽  
Author(s):  
Soumyashree Pany ◽  
K. M. Parida
Keyword(s):  
Visible Light ◽  
Specific Surface ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Charge Separation ◽  
Small Crystallite Size ◽  
Excellent Activity ◽  
Efficient Charge ◽  
Small Crystallite

The efficient charge separation, small crystallite size and enhanced specific surface area in N,S-TiO2/g-C3N4 nanocomposites make the system pivotal and unique for hydrogen evolution.

Noble-metal-free CdS/Ni-MOF composites with highly efficient charge separation for photocatalytic H2 evolution

2020 ◽  
Vol 522 ◽  
pp. 146356 ◽  
Author(s):  
Junlan Guo ◽  
Yinghua Liang ◽  
Li Liu ◽  
Jinshan Hu ◽  
Huan Wang ◽  
...  
Keyword(s):  
Noble Metal ◽  
Charge Separation ◽  
H2 Evolution ◽  
Metal Free ◽  
Highly Efficient ◽  
Efficient Charge ◽  
Photocatalytic H2 Evolution
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