Environmentally friendly nitrogen-doped carbon quantum dots for next generation solar cells

Darragh Carolan, Conor Rocks, Dilli Babu Padmanaban, PD Maguire, Vladimir Svrcek, D Mariotti

Research output: Contribution to journalArticle

Abstract

Shine on you crazy carbon! In this work, nitrogen-doped carbon quantum dots (N-CQDs) are synthesized using a simple custom atmospheric pressure microplasma. The method is facile, rapid, and environmentally friendly and the N-CQDs can be produced in a few minutes with no need for high temperature, complicated chemical techniques, or surface ligands. The N-CQDs are formed using molecular precursors and can be produced in different solvent mixtures. Material characterization techniques show a high degree of nitrogen doping on the QD surface with the amount of nitrogen depending on initial reaction conditions. The N-CQDs show interesting quantum confined optical properties that depend on the amount of nitrogen incorporation. Importantly, the band energy structure of the N-CQDs is elucidated and they are incorporated into a photovoltaic device as the photoactive layer achieving an extraordinary open-circuit voltage of 1.8 V and a power conversion efficiency of 0.8 (champion device), amongst the highest reported to date for group IV and carbon based quantum dots.
LanguageEnglish
Pages1611-1619
JournalSustainable Energy Fuels
Volume1
Early online date9 Aug 2017
DOIs
Publication statusE-pub ahead of print - 9 Aug 2017

Fingerprint

Semiconductor quantum dots
Solar cells
Nitrogen
Carbon
Open circuit voltage
Band structure
Conversion efficiency
Atmospheric pressure
Optical properties
Doping (additives)
Ligands

Keywords

  • quantum dots

Cite this

Carolan, Darragh ; Rocks, Conor ; Padmanaban, Dilli Babu ; Maguire, PD ; Svrcek, Vladimir ; Mariotti, D. / Environmentally friendly nitrogen-doped carbon quantum dots for next generation solar cells. 2017 ; Vol. 1. pp. 1611-1619.
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Environmentally friendly nitrogen-doped carbon quantum dots for next generation solar cells. / Carolan, Darragh; Rocks, Conor; Padmanaban, Dilli Babu; Maguire, PD; Svrcek, Vladimir; Mariotti, D.

Vol. 1, 09.08.2017, p. 1611-1619.

Research output: Contribution to journalArticle

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AU - Carolan, Darragh

AU - Rocks, Conor

AU - Padmanaban, Dilli Babu

AU - Maguire, PD

AU - Svrcek, Vladimir

AU - Mariotti, D

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AB - Shine on you crazy carbon! In this work, nitrogen-doped carbon quantum dots (N-CQDs) are synthesized using a simple custom atmospheric pressure microplasma. The method is facile, rapid, and environmentally friendly and the N-CQDs can be produced in a few minutes with no need for high temperature, complicated chemical techniques, or surface ligands. The N-CQDs are formed using molecular precursors and can be produced in different solvent mixtures. Material characterization techniques show a high degree of nitrogen doping on the QD surface with the amount of nitrogen depending on initial reaction conditions. The N-CQDs show interesting quantum confined optical properties that depend on the amount of nitrogen incorporation. Importantly, the band energy structure of the N-CQDs is elucidated and they are incorporated into a photovoltaic device as the photoactive layer achieving an extraordinary open-circuit voltage of 1.8 V and a power conversion efficiency of 0.8 (champion device), amongst the highest reported to date for group IV and carbon based quantum dots.

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