TY - GEN
T1 - Modification of nanomorphology in polymer/fullerene blends-route toward high efficiency polymer solar cells
AU - Yang, Yang
AU - Li, Gang
AU - Shrotriya, Vishal
AU - Yao, Yan
AU - Chen, Hsiang Yu
AU - Sista, Srinivas
PY - 2009/3/22
Y1 - 2009/3/22
N2 - Extensive research is going into polymer solar cells because of their advantage of ease of fabrication, low cost, ability to make large area devices and mechanical flexibility. Optimizing the morphology on a molecular level is essential for achieving high performance polymer solar cells. Optimal nanomorphology leads to optimized exciton dissociation efficiency which is determined by the donor/acceptor interface area and optimal charge transport efficiency through percolating pathways for carriers. In this presentation, we discuss three strategies to manipulate the nanomorphology of regioregular poly(3-hexylthiophene) (rr-P3HT): [6,6]phenyl-C61-butyric acid methyl ester (PCBM) blends viz. thermal annealing, solvent annealing and mixed solvent approach, all of which lead to improved photovoltaic performance. It has been shown that all the three strategies lead to better ordering of the P3HT domains and hence good polymer crystallinity. The effect of these strategies on the blend morphology, polymer crystallinity, absorption and charge carrier mobility will be discussed and will be related to the photovoltaic performance of the device.
AB - Extensive research is going into polymer solar cells because of their advantage of ease of fabrication, low cost, ability to make large area devices and mechanical flexibility. Optimizing the morphology on a molecular level is essential for achieving high performance polymer solar cells. Optimal nanomorphology leads to optimized exciton dissociation efficiency which is determined by the donor/acceptor interface area and optimal charge transport efficiency through percolating pathways for carriers. In this presentation, we discuss three strategies to manipulate the nanomorphology of regioregular poly(3-hexylthiophene) (rr-P3HT): [6,6]phenyl-C61-butyric acid methyl ester (PCBM) blends viz. thermal annealing, solvent annealing and mixed solvent approach, all of which lead to improved photovoltaic performance. It has been shown that all the three strategies lead to better ordering of the P3HT domains and hence good polymer crystallinity. The effect of these strategies on the blend morphology, polymer crystallinity, absorption and charge carrier mobility will be discussed and will be related to the photovoltaic performance of the device.
UR - http://www.scopus.com/inward/record.url?scp=78649506196&partnerID=8YFLogxK
M3 - Conference article published in proceeding or book
AN - SCOPUS:78649506196
SN - 9780841224414
T3 - ACS National Meeting Book of Abstracts
BT - American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
T2 - 237th National Meeting and Exposition of the American Chemical Society, ACS 2009
Y2 - 22 March 2009 through 26 March 2009
ER -