An easy approach of preparing strongly luminescent carbon dots and their polymer based composites for enhancing solar cell efficiency

We report a one-step approach for synthesis of carbon dots (CDs) under mild conditions. By using (N-(2-aminoethyl)-3-aminopropyl)tris-(2-ethoxy) silane (KH791) as catalyzer, stabilizing and passivation agent, the resultant CDs are allowed to be self-assembled in solution and exhibit excitation wavel...

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Bibliographic Details
Published in:Carbon (New York) 2014-04, Vol.70, p.190-198
Main Authors: Huang, Jia Jia, Zhong, Zhen Feng, Rong, Min Zhi, Zhou, Xiang, Chen, Xu Dong, Zhang, Ming Qiu
Format: Article
Language:English
Subjects:
Applied sciences
Cadmium sulfides
Carbon
Cross-disciplinary physics: materials science
rheology
Energy
Exact sciences and technology
Fullerenes and related materials
diamonds, graphite
Materials science
Natural energy
Photovoltaic cells
Photovoltaic conversion
Physics
Polymer matrix composites
Polysiloxanes
Solar cells
Solar cells. Photoelectrochemical cells
Solar energy
Specific materials
Sunlight
Ultraviolet
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Summary:We report a one-step approach for synthesis of carbon dots (CDs) under mild conditions. By using (N-(2-aminoethyl)-3-aminopropyl)tris-(2-ethoxy) silane (KH791) as catalyzer, stabilizing and passivation agent, the resultant CDs are allowed to be self-assembled in solution and exhibit excitation wavelength independent photoluminescence (PL) performance. When the solvent is removed, luminescent CDs filled polysiloxane composite is readily yielded through hydrolytic condensation between KH791 and CDs. According to this habit, CDs can be conveniently utilized by coating the hybrid solution on proper substrates, etc. On the basis of the luminescent down-shifting behavior of the composite with CDs, power conversion efficiency of polymer-fullerene-based bulk heterojunction solar cell is increased by about 12% due to effective light conversion of near ultraviolet and blue-violet portions of sunlight. The simple preparation, easy processing and unique PL properties of CDs and their polymer composite provide the latter with broad applicability.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2013.12.092