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Efficient solar cells are more stable: the impact of polymer molecular weight on performance of organic photovoltaics

Research output: Contribution to journal › Article › peer-review

Standard Standard

Efficient solar cells are more stable: the impact of polymer molecular weight on performance of organic photovoltaics. / Ding, Ziqian; Kettle, Jeffrey; Horie, M. et al.
In: Journal of Materials Chemistry A, Vol. 4, No. 19, 21.05.2016, p. 7274-7280.

Research output: Contribution to journal › Article › peer-review

HarvardHarvard

Ding, Z, Kettle, J, Horie, M, Chang, SM, Smith, GC, Shames, AI & Katz, EA 2016, 'Efficient solar cells are more stable: the impact of polymer molecular weight on performance of organic photovoltaics', Journal of Materials Chemistry A, vol. 4, no. 19, pp. 7274-7280. https://doi.org/10.1039/C6TA00721J

APA

Ding, Z., Kettle, J., Horie, M., Chang, S. M., Smith, G. C., Shames, A. I., & Katz, E. A. (2016). Efficient solar cells are more stable: the impact of polymer molecular weight on performance of organic photovoltaics. Journal of Materials Chemistry A, 4(19), 7274-7280. https://doi.org/10.1039/C6TA00721J

CBE

Ding Z, Kettle J, Horie M, Chang SM, Smith GC, Shames AI, Katz EA. 2016. Efficient solar cells are more stable: the impact of polymer molecular weight on performance of organic photovoltaics. Journal of Materials Chemistry A. 4(19):7274-7280. https://doi.org/10.1039/C6TA00721J

MLA

Ding, Ziqian et al. "Efficient solar cells are more stable: the impact of polymer molecular weight on performance of organic photovoltaics". Journal of Materials Chemistry A. 2016, 4(19). 7274-7280. https://doi.org/10.1039/C6TA00721J

VancouverVancouver

Ding Z, Kettle J, Horie M, Chang SM, Smith GC, Shames AI et al. Efficient solar cells are more stable: the impact of polymer molecular weight on performance of organic photovoltaics. Journal of Materials Chemistry A. 2016 May 21;4(19):7274-7280. Epub 2016 Apr 14. doi: 10.1039/C6TA00721J

Author

Ding, Ziqian ; Kettle, Jeffrey ; Horie, M. et al. / Efficient solar cells are more stable: the impact of polymer molecular weight on performance of organic photovoltaics. In: Journal of Materials Chemistry A. 2016 ; Vol. 4, No. 19. pp. 7274-7280.

RIS

TY - JOUR

T1 - Efficient solar cells are more stable: the impact of polymer molecular weight on performance of organic photovoltaics

AU - Ding, Ziqian

AU - Kettle, Jeffrey

AU - Horie, M.

AU - Chang, S.M.

AU - Smith, G.C.

AU - Shames, A. I.

AU - Katz, E. A.

PY - 2016/5/21

Y1 - 2016/5/21

N2 - The principle remaining challenge in the research area of organic photovoltaic (OPV) materials is to develop solar cells that combine high efficiency, stability and reproducibility. Here, we demonstrate an experimental strategy which has successfully addressed this challenge. We produced a number of samples of the highly efficient PTB7 polymer with various molecular weights (Mn ∼ 40–220k). OPV cells fabricated with this polymer demonstrated significant improvement of the cell efficiency (by ∼90% relative) and lifetime (by ∼300% relative) with the Mn increase. We attribute these effects to the lower density of recombination centers (persistent radical defects revealed by EPR spectroscopy) and better photoactive layer morphology in the samples with higher Mn. Relevance of the observed correlation between the OPV efficiency and stability is discussed.

AB - The principle remaining challenge in the research area of organic photovoltaic (OPV) materials is to develop solar cells that combine high efficiency, stability and reproducibility. Here, we demonstrate an experimental strategy which has successfully addressed this challenge. We produced a number of samples of the highly efficient PTB7 polymer with various molecular weights (Mn ∼ 40–220k). OPV cells fabricated with this polymer demonstrated significant improvement of the cell efficiency (by ∼90% relative) and lifetime (by ∼300% relative) with the Mn increase. We attribute these effects to the lower density of recombination centers (persistent radical defects revealed by EPR spectroscopy) and better photoactive layer morphology in the samples with higher Mn. Relevance of the observed correlation between the OPV efficiency and stability is discussed.

U2 - 10.1039/C6TA00721J

DO - 10.1039/C6TA00721J

M3 - Article

VL - 4

SP - 7274

EP - 7280

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

SN - 2050-7496

IS - 19

ER -