Effect of fluorination on haze reduction in transparent polyimide films for flexible substrates

2016 ◽  
Vol 134 (4) ◽  
Author(s):  
Yooseong Yang ◽  
Jong Hwan Park ◽  
Youngsuk Jung ◽  
Seung Geol Lee ◽  
Sang Kil Park ◽  
...  
2016 ◽  
Vol 24 (1) ◽  
Author(s):  
K. Znajdek ◽  
M. Sibiński ◽  
A. Strąkowska ◽  
Z. Lisik

The article presents an overview of polymeric materials for flexible substrates in photovoltaic (PV) structures that could be used as power supply in the personal electronic systems. Four types of polymers have been elected for testing. The first two are the most specialized and heat resistant polyimide films. The third material is transparent polyethylene terephthalate film from the group of polyesters which was proposed as a cheap and commercially available substrate for the technology of photovoltaic cells in a superstrate configuration. The last selected polymeric material is a polysiloxane, which meets the criteria of high elasticity, is temperature resistant and it is also characterized by relatively high transparency in the visible light range. For the most promising of these materials additional studies were performed in order to select those of them which represent the best optical, mechanical and temperature parameters according to their usage for flexible substrates in solar cells.


Author(s):  
O.C. de Hodgins ◽  
K. R. Lawless ◽  
R. Anderson

Commercial polyimide films have shown to be homogeneous on a scale of 5 to 200 nm. The observation of Skybond (SKB) 705 and PI5878 was carried out by using a Philips 400, 120 KeV STEM. The objective was to elucidate the structural features of the polymeric samples. The specimens were spun and cured at stepped temperatures in an inert atmosphere and cooled slowly for eight hours. TEM micrographs showed heterogeneities (or nodular structures) generally on a scale of 100 nm for PI5878 and approximately 40 nm for SKB 705, present in large volume fractions of both specimens. See Figures 1 and 2. It is possible that the nodulus observed may be associated with surface effects and the structure of the polymers be regarded as random amorphous arrays. Diffraction patterns of the matrix and the nodular areas showed different amorphous ring patterns in both materials. The specimens were viewed in both bright and dark fields using a high resolution electron microscope which provided magnifications of 100,000X or more on the photographic plates if desired.


Author(s):  
Wei-Wei Chen ◽  
Jui-Wen Pan ◽  
Shie-Chang Jeng
Keyword(s):  

2020 ◽  
Vol 62 (2) ◽  
pp. 196-204
Author(s):  
I. V. Gofman ◽  
A. L. Nikolaeva ◽  
I. V. Abalov ◽  
E. M. Ivan’kova ◽  
I. V. Kuntzman ◽  
...  

Author(s):  
Mahesh Soni ◽  
Dhayalan Shakthivel ◽  
Adamos Christou ◽  
Ayoub Zumeit ◽  
Nivasan Yogeswaran ◽  
...  

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