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Morphology changes upon scaling a high-efficiency, solution-processed solar cell

Research output: Contribution to journalArticlepeer-review

DOI

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Morphology changes upon scaling a high-efficiency, solution-processed solar cell. / Ro, Hyun Wook; Downing, Jonathan M.; Engmann, Sebastian; Herzing, Andrew A.; Delongchamp, Dean M.; Richter, Lee J.; Mukherjee, Subhrangsu; Ade, Harald; Abdelsamie, Maged; Jagadamma, Lethy K.; Amassian, Aram; Liu, Yuhang; Yan, He.

In: Energy and Environmental Science, Vol. 9, No. 9, 01.09.2016, p. 2835-2846.

Research output: Contribution to journalArticlepeer-review

Harvard

Ro, HW, Downing, JM, Engmann, S, Herzing, AA, Delongchamp, DM, Richter, LJ, Mukherjee, S, Ade, H, Abdelsamie, M, Jagadamma, LK, Amassian, A, Liu, Y & Yan, H 2016, 'Morphology changes upon scaling a high-efficiency, solution-processed solar cell', Energy and Environmental Science, vol. 9, no. 9, pp. 2835-2846. https://doi.org/10.1039/c6ee01623e

APA

Ro, H. W., Downing, J. M., Engmann, S., Herzing, A. A., Delongchamp, D. M., Richter, L. J., Mukherjee, S., Ade, H., Abdelsamie, M., Jagadamma, L. K., Amassian, A., Liu, Y., & Yan, H. (2016). Morphology changes upon scaling a high-efficiency, solution-processed solar cell. Energy and Environmental Science, 9(9), 2835-2846. https://doi.org/10.1039/c6ee01623e

Vancouver

Ro HW, Downing JM, Engmann S, Herzing AA, Delongchamp DM, Richter LJ et al. Morphology changes upon scaling a high-efficiency, solution-processed solar cell. Energy and Environmental Science. 2016 Sep 1;9(9):2835-2846. https://doi.org/10.1039/c6ee01623e

Author

Ro, Hyun Wook ; Downing, Jonathan M. ; Engmann, Sebastian ; Herzing, Andrew A. ; Delongchamp, Dean M. ; Richter, Lee J. ; Mukherjee, Subhrangsu ; Ade, Harald ; Abdelsamie, Maged ; Jagadamma, Lethy K. ; Amassian, Aram ; Liu, Yuhang ; Yan, He. / Morphology changes upon scaling a high-efficiency, solution-processed solar cell. In: Energy and Environmental Science. 2016 ; Vol. 9, No. 9. pp. 2835-2846.

Bibtex - Download

@article{396ea942a0b24cb480886b3cb93e4606,
title = "Morphology changes upon scaling a high-efficiency, solution-processed solar cell",
abstract = "Solution processing via roll-to-roll (R2R) coating promises a low cost, low thermal budget, sustainable revolution for the production of solar cells. Poly[(5,6-difluoro-2,1,3-benzothiadiazol-4,7-diyl)-alt-(3,3′′′-di(2-octyldodecyl)-2,2′;5′,2′′;5′′,2′′′-quaterthiophen-5,5-diyl)], PffBT4T-2OD, has recently been shown to achieve high power conversion efficiency (>10%) paired with multiple acceptors when thick films are spun-coat from hot solutions. We present detailed morphology studies of PffBT4T-2OD based bulk heterojunction films deposited by the volume manufacturing compatible techniques of blade-coating and slot-die coating. Significant aspects of the film morphology, the average crystal domain orientation and the distribution of the characteristic phase separation length scales, are remarkably different when deposited by the scalable techniques vs. spun-coat. Yet, we find that optimized blade-coated devices achieve PCE > 9.5%, nearly the same as spun-coat. These results challenge some widely accepted propositions regarding what is an optimal BHJ morphology and suggest the hypothesis that diversity in the morphology that supports high performance may be a characteristic of manufacturable systems, those that maintain performance when coated thicker than ≈200 nm. In situ measurements reveal the key differences in the solidification routes for spin- and blade-coating leading to the distinct film structures.",
author = "Ro, {Hyun Wook} and Downing, {Jonathan M.} and Sebastian Engmann and Herzing, {Andrew A.} and Delongchamp, {Dean M.} and Richter, {Lee J.} and Subhrangsu Mukherjee and Harald Ade and Maged Abdelsamie and Jagadamma, {Lethy K.} and Aram Amassian and Yuhang Liu and He Yan",
year = "2016",
month = sep,
day = "1",
doi = "10.1039/c6ee01623e",
language = "English",
volume = "9",
pages = "2835--2846",
journal = "Energy & Environmental Science",
issn = "1754-5692",
publisher = "Royal Society of Chemistry",
number = "9",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Morphology changes upon scaling a high-efficiency, solution-processed solar cell

AU - Ro, Hyun Wook

AU - Downing, Jonathan M.

AU - Engmann, Sebastian

AU - Herzing, Andrew A.

AU - Delongchamp, Dean M.

AU - Richter, Lee J.

AU - Mukherjee, Subhrangsu

AU - Ade, Harald

AU - Abdelsamie, Maged

AU - Jagadamma, Lethy K.

AU - Amassian, Aram

AU - Liu, Yuhang

AU - Yan, He

PY - 2016/9/1

Y1 - 2016/9/1

N2 - Solution processing via roll-to-roll (R2R) coating promises a low cost, low thermal budget, sustainable revolution for the production of solar cells. Poly[(5,6-difluoro-2,1,3-benzothiadiazol-4,7-diyl)-alt-(3,3′′′-di(2-octyldodecyl)-2,2′;5′,2′′;5′′,2′′′-quaterthiophen-5,5-diyl)], PffBT4T-2OD, has recently been shown to achieve high power conversion efficiency (>10%) paired with multiple acceptors when thick films are spun-coat from hot solutions. We present detailed morphology studies of PffBT4T-2OD based bulk heterojunction films deposited by the volume manufacturing compatible techniques of blade-coating and slot-die coating. Significant aspects of the film morphology, the average crystal domain orientation and the distribution of the characteristic phase separation length scales, are remarkably different when deposited by the scalable techniques vs. spun-coat. Yet, we find that optimized blade-coated devices achieve PCE > 9.5%, nearly the same as spun-coat. These results challenge some widely accepted propositions regarding what is an optimal BHJ morphology and suggest the hypothesis that diversity in the morphology that supports high performance may be a characteristic of manufacturable systems, those that maintain performance when coated thicker than ≈200 nm. In situ measurements reveal the key differences in the solidification routes for spin- and blade-coating leading to the distinct film structures.

AB - Solution processing via roll-to-roll (R2R) coating promises a low cost, low thermal budget, sustainable revolution for the production of solar cells. Poly[(5,6-difluoro-2,1,3-benzothiadiazol-4,7-diyl)-alt-(3,3′′′-di(2-octyldodecyl)-2,2′;5′,2′′;5′′,2′′′-quaterthiophen-5,5-diyl)], PffBT4T-2OD, has recently been shown to achieve high power conversion efficiency (>10%) paired with multiple acceptors when thick films are spun-coat from hot solutions. We present detailed morphology studies of PffBT4T-2OD based bulk heterojunction films deposited by the volume manufacturing compatible techniques of blade-coating and slot-die coating. Significant aspects of the film morphology, the average crystal domain orientation and the distribution of the characteristic phase separation length scales, are remarkably different when deposited by the scalable techniques vs. spun-coat. Yet, we find that optimized blade-coated devices achieve PCE > 9.5%, nearly the same as spun-coat. These results challenge some widely accepted propositions regarding what is an optimal BHJ morphology and suggest the hypothesis that diversity in the morphology that supports high performance may be a characteristic of manufacturable systems, those that maintain performance when coated thicker than ≈200 nm. In situ measurements reveal the key differences in the solidification routes for spin- and blade-coating leading to the distinct film structures.

U2 - 10.1039/c6ee01623e

DO - 10.1039/c6ee01623e

M3 - Article

AN - SCOPUS:84984903663

VL - 9

SP - 2835

EP - 2846

JO - Energy & Environmental Science

JF - Energy & Environmental Science

SN - 1754-5692

IS - 9

ER -

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