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High Efficiency P3HT/PCBM Solar Cell

Published online by Cambridge University Press:  01 February 2011

Kanzan Inoue ,
Ross Ulbricht ,
Pallavi C. Madakasira ,
Miaoxin Zhou ,
Sergey B. Lee ,
John Ferraris  and
Anvar A. Zakhidov
Kanzan Inoue
Affiliation:
NanoTech Institute, The University of Texas at Dallas, 2601 N. Floyd Rd. Richardson, TX 75083, USA. Department of Physics, The University of Texas at Dallas, 2601 N. Floyd Rd. Richardson, TX 75083, USA.
Ross Ulbricht
Affiliation:
NanoTech Institute, The University of Texas at Dallas, 2601 N. Floyd Rd. Richardson, TX 75083, USA.
Pallavi C. Madakasira
Affiliation:
NanoTech Institute, The University of Texas at Dallas, 2601 N. Floyd Rd. Richardson, TX 75083, USA. Department of Physics, The University of Texas at Dallas, 2601 N. Floyd Rd. Richardson, TX 75083, USA.
Miaoxin Zhou
Affiliation:
Department of Chemistry, The University of Texas at Dallas, 2601 N. Floyd Rd. Richardson, TX 75083, USA.
Sergey B. Lee
Affiliation:
NanoTech Institute, The University of Texas at Dallas, 2601 N. Floyd Rd. Richardson, TX 75083, USA.
John Ferraris
Affiliation:
NanoTech Institute, The University of Texas at Dallas, 2601 N. Floyd Rd. Richardson, TX 75083, USA. Department of Physics, The University of Texas at Dallas, 2601 N. Floyd Rd. Richardson, TX 75083, USA.
Anvar A. Zakhidov
Affiliation:
NanoTech Institute, The University of Texas at Dallas, 2601 N. Floyd Rd. Richardson, TX 75083, USA. Department of Physics, The University of Texas at Dallas, 2601 N. Floyd Rd. Richardson, TX 75083, USA.
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Abstract

We report a nearly twofold increase of short circuit current: from Isc ∼ 10 mA/cm2 to Isc = 16–20 mA/cm2 in P3HT/PCBM solar cells (SC) employing freshly prepared regio-regular poly(3-hexylthiophene) (RR-P3HT) without special purification. The power conversion efficiency is enhanced to η≥ 4% as compared to our best η=3.8% in SC with commercial polymer despite the decreased filling factor (FF= 0.42, as compared to best FF = 0.59). We used our earlier found [1] procedures with optimal post heat treatment temperatures and time for our polymer SC. We also discovered a strong correlation between the device preparation procedures and performance. The optimal phase separation of PCBM and RR-P3HT into a bi-continuous network structure occurs after quite long solution stirring times (enhanced homogenization) and surprisingly very short annealing time at optimal temperature. We also found that the optimal concentration of PCBM in a RR-P3HT matrix is rather low, only c∼35 wt%, contrary to high c∼80 wt% in PPV based SC.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 836: Symposium L – Materials for Photovoltaics , 2004 , L3.2
Copyright
Copyright © Materials Research Society 2005

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References

REFERENCES

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