Journal
NANO ENERGY
Volume 26, Issue -, Pages 305-312Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2016.05.040
Keywords
Silicon nanocrystals; Solar cells; Ternary
Categories
Funding
- National Basic Research Program of China [2013CB632101]
- NSFC for excellent young researchers [61222404]
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Inorganic/organic ternary hybrid structures are emerging as promising candidates for the fabrication of novel solar cells. As one of the most important inorganic solar cell material, silicon (Si) is worth careful exploration during the preparation of the hybrid structures. Here we incorporate the nanoscale form of Si, Si nanocrystals (NCs), into the classical bulk-heterojunction organic solar cells based on poly (3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). It is found that the solar cell efficiency may increase by similar to 40% when similar to 5% of PCBM in the original P3HT:PCBM blend is replaced with Si NCs. The efficiency enhancement is enabled by the improved short-wavelength absorption, optimized film structure and cascade energy-level alignment. (C) 2016 Elsevier Ltd. All rights reserved.
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