期刊
ADVANCED FUNCTIONAL MATERIALS
卷 28, 期 50, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201804712
关键词
2D materials; energy transfer; photodetector; quantum dots; solar cells
类别
资金
- National Natural Science Foundation of China [51672150]
- Special Foundation of Young Professor of Zhejiang University [2013QNA5007]
Graphene with a series of neoteric electronic and optical properties is an intriguing building block for optoelectronic devices. Over the past decade, graphene-based solar cells (SCs) and photodetectors (PDs) which can convert light signals to electrical signals have received burgeoning exploration. However, limited light absorption hampers the performance of these devices. Quantum dots (QDs) possess a strong confinement effect, a large exciton energy, and long exciton lifetime, enhancing the interaction between incident light and graphene. Especially, as the density of states near the Dirac point of graphene is ultralow, it is easy to modify the Fermi level of graphene by inserting quantum dots at the interface between graphene and light, thereby enhancing the performance of graphene-based optoelectronic devices. The characteristics of QDs and crucial physical mechanisms of the interaction and energy transfer in QDs/graphene nanohybrids are systematically addressed. The factors influencing the efficiency of energy transfer are also analyzed quantitatively. Moreover, the experimental process of QD-enhanced technologies for SCs, photoconductors, phototransistors, and photodiode PDs is reviewed. Eventually, a conclusion is given and the remaining challenges and future development for QDs/2D materials hybrid systems is discussed. Possible steps toward large-scale commercial applications and integration into optoelectronic networks are suggested.
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