Carbon-Based Quantum Dots for Photovoltaic Devices: A Review

AbstractIn this work, inorganic tin-doped perovskite quantum dots (PQDs) are incorporated into carbon-based perovskite solar cells (PSCs) to improve their photovoltaic performance. On the one hand, by controlling the content of Sn2+ doping, the energy level of the tin-doped PQDs can be adjusted, to realize optimized band alignment and enhanced separation of photogenerated electron–hole pairs. On the other hand, the incorporation of tin-doped PQDs provided with a relatively high acceptor concentration due to the self-p-type doping effect is able to reduce the width of the depletion region near the back surface of the perovskite, thereby enhancing the hole extraction. Particularly, after the addition of CsSn0.2Pb0.8I3 quantum dots (QDs), improvement of the power conversion efficiency (PCE) from 12.80 to 14.22% can be obtained, in comparison with the pristine device. Moreover, the experimental results are analyzed through the simulation of the one-dimensional perovskite/tin-doped PQDs heterojunction.

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Bidentate ligand modified CsPbI2Br quantum dots as an interface for high-performance carbon-based perovskite solar cells

Materials Science in Semiconductor Processing ◽

10.1016/j.mssp.2021.105847 ◽

2021 ◽

Vol 131 ◽

pp. 105847

Author(s):

Siqi Han ◽

Haiming Zhang ◽

Rufeng Wang ◽

Qingchen He

Keyword(s):

Quantum Dots ◽

Solar Cells ◽

High Performance ◽

Perovskite Solar Cells ◽

Bidentate Ligand ◽

Carbon Based

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Electrochemiluminescence of carbon‐based quantum dots: synthesis, mechanism and application in heavy metal ions detection

Electroanalysis ◽

10.1002/elan.202100221 ◽

2021 ◽

Author(s):

Libo Li ◽

Wanlin Zhao ◽

Lijun Luo ◽

Xiaohong Liu ◽

Xiaoya Bi ◽

...

Keyword(s):

Heavy Metal ◽

Quantum Dots ◽

Metal Ions ◽

Heavy Metal Ions ◽

Synthesis Mechanism ◽

Metal Ions Detection ◽

Carbon Based

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Carbon Based Nanodots in Early Diagnosis of Cancer

Frontiers in Chemistry ◽

10.3389/fchem.2021.669169 ◽

2021 ◽

Vol 9 ◽

Author(s):

Gurpal Singh ◽

Harinder Kaur ◽

Akanksha Sharma ◽

Joga Singh ◽

Hema Kumari Alajangi ◽

...

Keyword(s):

Quantum Dots ◽

Early Stage ◽

Imaging Techniques ◽

Graphene Quantum Dots ◽

Carbon Quantum Dots ◽

Diagnostic Methods ◽

Early Diagnosis Of Cancer ◽

Successful Treatment Outcome ◽

Wide Range ◽

Carbon Based

Detection of cancer at an early stage is one of the principal factors associated with successful treatment outcome. However, current diagnostic methods are not capable of making sensitive and robust cancer diagnosis. Nanotechnology based products exhibit unique physical, optical and electrical properties that can be useful in diagnosis. These nanotech-enabled diagnostic representatives have proved to be generally more capable and consistent; as they selectively accumulated in the tumor site due to their miniscule size. This article rotates around the conventional imaging techniques, the use of carbon based nanodots viz Carbon Quantum Dots (CQDs), Graphene Quantum Dots (GQDs), Nanodiamonds, Fullerene, and Carbon Nanotubes that have been synthesized in recent years, along with the discovery of a wide range of biomarkers to identify cancer at early stage. Early detection of cancer using nanoconstructs is anticipated to be a distinct reality in the coming years.

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