Abstract
-Improvement of the surface roughness and power conversion efficiency (PCE) of bulk hetero-junction (BHJ) solar cells was made by the addition of organic additives for the cells based on a low energy-gap polymer, poly [2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta [2,1-b;3,4-b'] dithiophene)-alt-4,7(2,1,3-benzothiadiazole)] (PCPDTBT), as an electron donor and [6,6]-phenyl C61 butyric acid methyl ester (PC61BM) as the electron acceptor. The PCPDTBT: PC61BM active layers were prepared by spin-coating process from four different organic solvents: pure chlorobenzene, chlorobenzene with 2.5 vol% 1,2-ethanedithiol (EDT) additive, chlorobenzene with 2.5 vol% 1,8-octanedithiol (ODT) additive, and chlorobenzene with a combination of 2.5 vol% EDT and 2.5 vol% ODT additives. The smoothest surface of the active layer, which was observed by AFM, was obtained in the case of PCPDTBT:PC61BM prepared with a combination of EDT and ODT additives in chlorobenzene, and a maximum PCE of 3.5% was achieved.
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References
C. J. Brabec, N. S. Sariciftci and J. C. Hummelen, Adv. Funct. Mater., 11, 15 (2001).
S. Gunes, H. Neugebauer and N. S. Sariciftci, Chem. Rev., 107, 1324 (2007).
B.C. Thompson and J.M. J. Frechet, Angew. Chem., Int. Ed., 47, 58 (2008).
C. J. Brabec, S. Gowrisanker, J. J. M. Halls, D. Laird, S. J. Jia and S. P. Williams, Adv. Mater., 22, 3839 (2010).
C. Liu, C. Yi, K. Wang, Y. Yang, R. S. Bhatta, M. Tsige, S. Xiao and X. Gong, ACS Appl. Mater. Interfaces, 7(8),4928 (2015).
Y. Chang, Y. Su and C. Leu, Thin Solid Films, 534, 492 (2013).
W. Ma, C. Yang, X. Gong, K. Lee and A. J. Heeger, Adv. Funct. Mater., 15, 1617 (2005).
G. Li, Y. Yao, H. Yang, V. Shrotriya, G. Yang and Y. Yang, Adv. Funct. Mater., 17, 1636 (2007).
Y. Liu, J. Zhao, Z. Li, C. Mu, W. Ma, H. Hu, K. Jiang, H. Lin, H. Adeand and H. Yan, Nature Commun,, 5, 5293 (2014).
H. Liao, P. Chen, R. P. H. Chang and W. Su, Polymers, 6(11),2784 (2014).
S. Cook, A. Furube and R. Katoh, Japanese J. Appl. Phys., 47, 1238 (2008).
W. Zhang, Y. Wu, Q. Bao, F. Gao and J. Fang, Adv. Energy Mater., 4, 1400359 (2014).
Z.C. He, C. Zhang, X.F. Xu, L. J. Zhang, L. Huang, J.W. Chen, H.B. Wu and Y. Cao, Adv. Mater., 23, 3086 (2011).
Y. M. Chang and J. M. Ding, Thin Solid Films, 520, 5400 (2012).
H.L. Yip, S.K. Hau, N.S. Baek, H. Ma and A.K.Y. Jen, Adv. Mater., 20, 2376 (2008).
S. K. Hau, H. Yip, O. Acton, S. Nam, H. Maa and A. K.-Y. Jen, J. Mater. Chem., 18, 5113 (2008).
G. Wang, T. Jiu, G. Tang, J. Li, P. Li, X. Song, F. Lu and J. Fang, ACS Sustainable Chem. Eng., 2, 1331 (2014).
P. Ruankham, S. Yoshikawa and T. Sagawa, Phys. Chem. Chem. Phys., 15, 9516 (2013).
M. Tanveer, A. Habib and M. Bilal Khan, J. Eng. Sci., 6(1),15 (2013).
L. Chen, Z. Xu, Z. Honga and Y. Yang, J. Mater. Chem., 20, 2575 (2010).
J.Y. Kim, S.H. Kim, H. H. Lee, K. Lee, W. Ma, X. Gong and A. J. Heeger, Adv. Mater., 18, 572 (2006).
J. Yang, J. You, C.C. Chen, W.C. Hsu, H.R. Tan, X.W. Zhang, Z. Hong and Y. Yang, ACS Nano, 5, 6210 (2011).
A.K. Pandey, M. Aljada, M. Velusamy, P.L. Burn and P. Meredith, Adv. Mater., 24, 1055 (2012).
Q. Li, W. J. Yoon and H. Ju, Nanoscale Res. Lett., 9, 460 (2014).
J. Peet, J.Y. Kim, N. E. Coates, W. L. Ma, D. Moses, A. J. Heeger and G. C. Bazan, Nature Mater., 6, 497 (2007).
M. T. Dang and J.D. Wuest, Chem. Soc. Rev., 42, 9105 (2013).
S. Ochiai, S. Imamura, S. Kannappan, K. Palanisamy and P. K. Shin, Cur. Appl. Phys., 13, S58 (2013).
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Pham, V.H.T., Truong, N.T.N., Trinh, T.K. et al. Controlling the morphology of the active layer by using additives and its effect on bulk hetero-junction solar cell performance. Korean J. Chem. Eng. 33, 678–682 (2016). https://doi.org/10.1007/s11814-015-0162-3
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DOI: https://doi.org/10.1007/s11814-015-0162-3