scholarly journals Consecutive Junction-Induced Efficient Charge Separation Mechanisms for High-Performance MoS2/Quantum Dot Phototransistors

2018 ◽  
Vol 10 (44) ◽  
pp. 38264-38271 ◽  
Author(s):  
Sangyeon Pak ◽  
Yuljae Cho ◽  
John Hong ◽  
Juwon Lee ◽  
Sanghyo Lee ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Charge Separation ◽  
High Performance ◽  
Separation Mechanisms ◽  
Efficient Charge

scholarly journals Flexible and efficient perovskite quantum dot solar cells via hybrid interfacial architecture

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Long Hu ◽  
Qian Zhao ◽  
Shujuan Huang ◽  
Jianghui Zheng ◽  
Xinwei Guan ◽  
...  
Keyword(s):  
Thin Film ◽  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
High Performance ◽  
Mechanical Stability ◽  
Mechanical Adhesion ◽  
Perovskite Quantum Dots ◽  
Efficient Charge ◽  
Photovoltaic Technologies

AbstractAll-inorganic CsPbI3 perovskite quantum dots have received substantial research interest for photovoltaic applications because of higher efficiency compared to solar cells using other quantum dots materials and the various exciting properties that perovskites have to offer. These quantum dot devices also exhibit good mechanical stability amongst various thin-film photovoltaic technologies. We demonstrate higher mechanical endurance of quantum dot films compared to bulk thin film and highlight the importance of further research on high-performance and flexible optoelectronic devices using nanoscale grains as an advantage. Specifically, we develop a hybrid interfacial architecture consisting of CsPbI3 quantum dot/PCBM heterojunction, enabling an energy cascade for efficient charge transfer and mechanical adhesion. The champion CsPbI3 quantum dot solar cell has an efficiency of 15.1% (stabilized power output of 14.61%), which is among the highest report to date. Building on this strategy, we further demonstrate a highest efficiency of 12.3% in flexible quantum dot photovoltaics.

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.

V-rich Bi2S3 nanowire with efficient charge separation and transport for high-performance and robust photoelectrochemical application under visible light

2020 ◽  
Vol 350 ◽  
pp. 47-55
Author(s):  
Yuan-Yuan Geng ◽  
Chun-Lan Tao ◽  
Shi-Fang Duan ◽  
Jovan San Martin ◽  
Yixiong Lin ◽  
...  
Keyword(s):  
Visible Light ◽  
Charge Separation ◽  
High Performance ◽  
Efficient Charge

Carbon quantum dot sensitized integrated Fe2O3@g-C3N4 core–shell nanoarray photoanode towards highly efficient water oxidation

2018 ◽  
Vol 6 (21) ◽  
pp. 9839-9845 ◽  
Author(s):  
Sha-Sha Yi ◽  
Jun-Min Yan ◽  
Qing Jiang
Keyword(s):  
Quantum Dot ◽  
Water Oxidation ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Core Shell ◽  
High Catalytic Activity ◽  
Carbon Quantum Dot ◽  
Efficient Charge ◽  
Oxidation Performance ◽  
Charge Separation Efficiency

The carbon quantum dot (CQD) sensitized integrated Ti:Fe2O3@g-C3N4 core–shell nanoarrays demonstrate superior PEC water oxidation performance which can be ascribed to efficient charge separation efficiency derived from the well-confined heterojunction structure together with the high catalytic activity of the CQDs for H2O2 decomposition.

scholarly journals High Performance PbS Quantum Dot/Graphene Hybrid Solar Cell with Efficient Charge Extraction

2016 ◽  
Vol 8 (22) ◽  
pp. 13902-13908 ◽  
Author(s):  
Byung-Sung Kim ◽  
Darren C. J. Neo ◽  
Bo Hou ◽  
Jong Bae Park ◽  
Yuljae Cho ◽  
...  
Keyword(s):  
Solar Cell ◽  
Quantum Dot ◽  
High Performance ◽  
Hybrid Solar Cell ◽  
Efficient Charge ◽  
Charge Extraction ◽  
Pbs Quantum Dot

Carbon Quantum Dot/TiO2 Nanohybrids: Efficient Photocatalysts for Hydrogen Generation via Intimate Contact and Efficient Charge Separation

2019 ◽  
Vol 2 (2) ◽  
pp. 1027-1032 ◽  
Author(s):  
Yulu Zhou ◽  
Sizhuo Yang ◽  
Donghua Fan ◽  
Jake Reilly ◽  
Hongwei Zhang ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Charge Separation ◽  
Hydrogen Generation ◽  
Intimate Contact ◽  
Carbon Quantum Dot ◽  
Efficient Charge

Charge transport effect and photovoltaic conversion of two-dimensional CdSeS quantum dot monolayers in inverted polymer solar cells

2019 ◽  
Vol 7 (38) ◽  
pp. 11797-11805 ◽  
Author(s):  
Guh-Hwan Lim ◽  
Kyu Seung Lee ◽  
Young Jae Park ◽  
Jaeho Shim ◽  
Jin Woo Choi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Charge Transport ◽  
Charge Separation ◽  
Polymer Solar Cells ◽  
Two Dimensional ◽  
Photovoltaic Conversion ◽  
Transport Effect ◽  
Efficient Charge ◽  
Inverted Polymer Solar Cells

Herein, we demonstrate that two-dimensional (2D) CdSeS quantum dot monolayers (QDM) can strongly influence efficient charge transport and charge separation, improving the performance of inverted polymer solar cells (iPSCs).

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