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

1.
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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