Citation: Quan-xiang Yan, Zhuo-wei Gu, Qi Li, Wei-fei Fu, Xiao-qiang Chen, Wen-qing Liu, Hong-bin Pan, Mang Wang, Hong-zheng Chen. Water Soluble Amino Grafted Silicon Nanoparticles and Their Use in Polymer Solar Cells[J]. Chinese Journal of Polymer Science, ;2014, 32(4): 395-401. doi: 10.1007/s10118-014-1415-z shu

Water Soluble Amino Grafted Silicon Nanoparticles and Their Use in Polymer Solar Cells

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State Key Lab of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding author: Hong-zheng Chen,
Received Date: 2 May 2013
Revised Date: 14 June 2013

Fund Project: This work was financially supported by the National Natural Science Foundation of China (NSFC) (Nos. 51261130582, 91233114 and 50990063).

Stable aqueous amino-grafted silicon nanoparticles (SiNPs-NH2) were prepared via one-pot solution method. By grafting amino groups on the particle surface, the dispersion of SiNPs in water became very stable and clear aqueous solutions could be obtained. By incorporating SiNPs-NH2 into the hole transport layer of poly(3,4-ethylenedioxythiophene)/polystyrene sulfonic acid (PEDOT:PSS), the performance of polymer solar cells composed of poly[2-methoxy,5-(2'-ethylhexyloxy)-1,4-phenylene vinylene] (MEH-PPV):[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) as active layer can be improved. SiNPs-NH2 are dispersed uniformly in the PEDOT:PSS solution and help form morphologies with small-sized domains in the PEDOT:PSS film. SiNPs-NH2 serve as screens between conducting polymer PEDOT and ionomer PSS to improve the phase separation and charge transport of the hole transport layer. As a result, the sheet resistance of PEDOT:PSS thin films is decreased from (935)105 to (133)105 /□. The power conversion efficiency (PCE) of polymer solar cells was thus improved by 9.8% for devices fabricated with PEDOT:PSS containing 1 wt% of SiNPs-NH2, compared with the devices fabricated by original PEDOT:PSS.
- SiNPs-NH2,
- Water-soluble,
- Phase separation,
- Polymer solar cells,
- Transport
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