Tailoring nanoscale morphology of polymer: Fullerene blends using electrostatic field
Journal Article
·
· ACS Applied Materials and Interfaces
- Mansoura Univ., Mansoura (Egypt); Iowa State Univ., Ames, IA (United States)
- Iowa State Univ., Ames, IA (United States)
- Ames Lab., Ames, IA (United States)
- South Dakota State Univ., Brookings, SD (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
In this paper, to tailor the nanoscale phase separation in polymer/fullerene blends, we study the effect of electrostatic field (E-field) on the solidification of poly(3-hexylthiophene-2, 5-diyl) (P3HT):[6,6]-phenyl-C61-butyric acid methyl ester (PC60BM) bulk heterojunction (BHJ). In addition to untreated sample (control); wet P3HT:PC60BM thin films were exposed to E-field of Van de Graaff (VDG) generator at three different directions – horizontal (H), tilted (T) and vertical (V) – relative to the plane of the substrate. Surface and bulk characterizations of field-treated BHJs affirm that fullerene molecules can easily penetrate the spaghetti-like P3HT and move up and down following the E-field. E-field treatment yields thin films with large P3HT- and PCBM-rich domains acting as continuous pathways for efficient charge separation, transport, and collection. We improve; (1) the hole mobility values up to 19.4 × 10-4 ± 1.6 × 10-4 cm2 V-1 s-1 (117% higher than the control), and (2) power conversion efficient (PCE) of conventional and inverted OPVs recording 2.58 ± 0.02% and 4.1 ± 0.4%. This E-field approach can serve as a new morphology-tuning technique, which is generally applicable to other polymer-fullerene systems.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- AC02-06CH11357; AC02-07CH11358
- OSTI ID:
- 1340684
- Alternate ID(s):
- OSTI ID: 1347909
- Report Number(s):
- IS--J 9235; 129386
- Journal Information:
- ACS Applied Materials and Interfaces, Journal Name: ACS Applied Materials and Interfaces Journal Issue: 3 Vol. 9; ISSN 1944-8244
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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