TY - JOUR
T1 - High performance airbrush spray coated organic solar cells via tuning the surface tension and saturated vapor pressure of different ternary solvent systems
AU - Zheng, Ding
AU - Huang, Jiang
AU - Zheng, Yifan
AU - Yu, Junsheng
N1 - Funding Information:
This research was funded by the Foundation of the National Natural Science Foundation of China (NSFC) (Grant No. 61177032 ), the Foundation for Innovation Research Groups of the NSFC (Grant No. 61421002 ), and Dr. J. Huang thanks for the financial support of the Fundamental Research Funds for the Central Universities (Grant no. ZYGX2014J046).
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/7/6
Y1 - 2015/7/6
N2 - In this work, thieno [3,4-b] thiophene/benzodithiophene (PTB7): [6,6]-phenyl C71-butyric acid methyl ester (PC71BM) based organic solar cell (OSC) with a new record of power conversion efficiency (PCE) of ∼7.62% has been realized using airbrush spray (AS) coating method in air ambient which can be well compatible with large-scale fabrication. By investigating the physical mechanism of AS coated blend films, a series of ternary solvent systems (TSS) are used to simultaneous optimize the surface tension and the saturated vapor pressure of solution. Therefore, different TSS further controls the morphology of PTB7:PC71BM blend films precisely and systematically. It is elucidated that the chlorobenzene (CB)/o-Xylene (o-Xy)/1, 8-diiodoctane (DIO) TSS with a ratio of 37:60:3 vol.% could lead to a homogeneous surface morphology with a decreased aggregation domain size of active layer. In addition, the high fill factor, increased PC71BM absorption and internal quantum efficiency indicate the formation of bicontinuous interpenetrating and fully percolated networks with nanostructured phase separation in BHJ blend films. Ultimately, the AS coated OSCs based on the TSS of CB/o-Xy/DIO gains a 34% enhancement in PCE, compared with the conventional CB/DIO solvent based OSCs.
AB - In this work, thieno [3,4-b] thiophene/benzodithiophene (PTB7): [6,6]-phenyl C71-butyric acid methyl ester (PC71BM) based organic solar cell (OSC) with a new record of power conversion efficiency (PCE) of ∼7.62% has been realized using airbrush spray (AS) coating method in air ambient which can be well compatible with large-scale fabrication. By investigating the physical mechanism of AS coated blend films, a series of ternary solvent systems (TSS) are used to simultaneous optimize the surface tension and the saturated vapor pressure of solution. Therefore, different TSS further controls the morphology of PTB7:PC71BM blend films precisely and systematically. It is elucidated that the chlorobenzene (CB)/o-Xylene (o-Xy)/1, 8-diiodoctane (DIO) TSS with a ratio of 37:60:3 vol.% could lead to a homogeneous surface morphology with a decreased aggregation domain size of active layer. In addition, the high fill factor, increased PC71BM absorption and internal quantum efficiency indicate the formation of bicontinuous interpenetrating and fully percolated networks with nanostructured phase separation in BHJ blend films. Ultimately, the AS coated OSCs based on the TSS of CB/o-Xy/DIO gains a 34% enhancement in PCE, compared with the conventional CB/DIO solvent based OSCs.
KW - Airbrush spray coating
KW - Organic solar cell (OSC)
KW - Saturated vapor pressure
KW - Surface tension
KW - Ternary solvent system
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U2 - 10.1016/j.orgel.2015.07.001
DO - 10.1016/j.orgel.2015.07.001
M3 - Article
AN - SCOPUS:84935067874
SN - 1566-1199
VL - 25
SP - 275
EP - 282
JO - Organic Electronics: physics, materials, applications
JF - Organic Electronics: physics, materials, applications
ER -