Strong polymer molecular weight-dependent material interactions: impact on the formation of the polymer/fullerene bulk heterojunction morphology

2017 ◽  
Vol 5 (25) ◽  
pp. 13176-13188 ◽  
Author(s):  
Joo-Hyun Kim ◽  
Abay Gadisa ◽  
Charley Schaefer ◽  
Huifeng Yao ◽  
Bhoj R. Gautam ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Phase Separation ◽  
Molecular Mobility ◽  
Bulk Heterojunction ◽  
Morphological Evolution ◽  
Domain Size ◽  
S Phase ◽  
Polymer Molecular Weight ◽  
Solvent Interactions ◽  
Polymer Solvent

The morphological evolution is initiated by L–L or L–S phase separation (left) and further developed by molecular mobility, governed by polymer–solvent interactions which determine the final domain size of the BHJ layer (right).

Optimisation of diketopyrrolopyrrole:fullerene solar cell performance through control of polymer molecular weight and thermal annealing

2014 ◽  
Vol 2 (45) ◽  
pp. 19282-19289 ◽  
Author(s):  
Zhenggang Huang ◽  
Elisa Collado Fregoso ◽  
Stoichko Dimitrov ◽  
Pabitra Shakya Tuladhar ◽  
Ying Woan Soon ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Solar Cells ◽  
Solar Cell ◽  
Thermal Annealing ◽  
Bulk Heterojunction ◽  
Cell Performance ◽  
Polymer Molecular Weight ◽  
Solar Cell Performance ◽  
Heterojunction Solar Cells ◽  
Bulk Heterojunction Solar Cells

The performance of bulk heterojunction solar cells based on a novel donor polymer DPP-TT-T was optimised by tuning molecular weight and thermal annealing.

Phase Separation of DMDBS from PP: Effect of Polymer Molecular Weight and Tacticity

2011 ◽  
Vol 44 (7) ◽  
pp. 2358-2364 ◽  
Author(s):  
K. Sreenivas ◽  
Rajeev Basargekar ◽  
Guruswamy Kumaraswamy
Keyword(s):  
Molecular Weight ◽  
Phase Separation ◽  
Polymer Molecular Weight

Molecular Composites of Rodlike/Flexible Polyimides

1989 ◽  
Vol 171 ◽  
Author(s):  
S. R. Rojstaczer ◽  
D.Y. Yoon ◽  
W. Volksen ◽  
B.A. Smith
Keyword(s):  
Molecular Weight ◽  
Phase Separation ◽  
Light Scattering ◽  
Film Thickness ◽  
Domain Size ◽  
Amic Acid ◽  
Solution Blending ◽  
Thermal Imidization ◽  
Precursor Polymers ◽  
Molecular Composites

ABSTRACTMixtures of a rodlike and a flexible polyimide were prepared by solution-blending of the respective poly(amic alkyl ester) and poly(amic acid), followed by solvent evaporation and thermal imidization. The size scale of the phase separation, as measured by light scattering, is primarily set during the demixing of the precursor polymers, with no significant coarsening observed due to the imidization performed at 400°C. The observed variation of the domain size with parameters such as composition, molecular weight and film thickness is discussed in terms of the miscibility of the precursor polymers as well as the thermal history to which these were exposed.

Determining the Role of Polymer Molecular Weight for High-Performance All-Polymer Solar Cells: Its Effect on Polymer Aggregation and Phase Separation

2015 ◽  
Vol 137 (6) ◽  
pp. 2359-2365 ◽  
Author(s):  
Hyunbum Kang ◽  
Mohammad Afsar Uddin ◽  
Changyeon Lee ◽  
Ki-Hyun Kim ◽  
Thanh Luan Nguyen ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Solar Cells ◽  
Phase Separation ◽  
High Performance ◽  
Polymer Solar Cells ◽  
Polymer Molecular Weight
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