Charge separation and fullerene triplet formation in blend films of polyfluorene polymers with [6,6]-phenyl C61 butyric acid methyl ester

2009 ◽  
pp. 10000 ◽  
Author(s):  
Jessica J. Benson-Smith ◽  
Hideo Ohkita ◽  
Steffan Cook ◽  
James R. Durrant ◽  
Donal D. C. Bradley ◽  
...  
Keyword(s):  
Methyl Ester ◽  
Butyric Acid ◽  
Charge Separation ◽  
Acid Methyl Ester ◽  
Blend Films ◽  
Acid Methyl ◽  
Butyric Acid Methyl Ester ◽  
Triplet Formation

Interface-induced crystallization and nanostructure formation of [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) in polymer blend films and its application in photovoltaics

2016 ◽  
Vol 4 (9) ◽  
pp. 3335-3341 ◽  
Author(s):  
Yufei Zhong ◽  
Kaori Suzuki ◽  
Daishi Inoue ◽  
Daisuke Hashizume ◽  
Seiichiro Izawa ◽  
...  
Keyword(s):  
Methyl Ester ◽  
Polymer Blend ◽  
Butyric Acid ◽  
Acid Methyl Ester ◽  
Blend Films ◽  
Nanostructure Formation ◽  
Acid Methyl ◽  
Butyric Acid Methyl Ester ◽  
Induced Crystallization

Nanorod-shaped crystals of PCBM grew in polymer blend films from the interface of pre-crystallized PCBM films.

scholarly journals Carrier Formation Dynamics of Organic Photovoltaics as Investigated by Time-Resolved Spectroscopy

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Kouhei Yonezawa ◽  
Minato Ito ◽  
Hayato Kamioka ◽  
Takeshi Yasuda ◽  
Liyuan Han ◽  
...  
Keyword(s):  
Methyl Ester ◽  
Butyric Acid ◽  
Organic Photovoltaics ◽  
Acid Methyl Ester ◽  
Time Resolved ◽  
Blend Film ◽  
Time Resolved Spectroscopy ◽  
Blend Films ◽  
Acid Methyl ◽  
Butyric Acid Methyl Ester

Bulk heterojunction (BHJ) based on a donor (D) polymer and an acceptor (A) fullerene derivative is a promising organic photovoltaics (OPV). In order to improve the incident photon-to-current efficiency (IPCE) of the BHJ solar cell, a comprehensive understanding of the ultrafast dynamics of excited species, such as singlet exciton (D*), interfacial charge-transfer (CT) state, and carrier (D+), is indispensable. Here, we performed femtosecond time-resolved spectroscopy of two prototypical BHJ blend films: poly(3-hexylthiophene) (P3HT)/[6,6]-phenyl C61-butyric acid methyl ester (PCBM) blend film and poly(9,9′-dioctylfluorene-co-bithiophene) (F8T2)/[6,6]-phenyl C71-butyric acid methyl ester (PC70BM) blend film. We decomposed differential absorption spectra into fast, slow, and constant components via two-exponential fitting at respective probe photon energies. The decomposition procedure clearly distinguished photoinduced absorptions (PIAs) due to D*, CT, and D+. Based on these assignments, we will compare the charge dynamics between the F8T2/PC70BM and P3HT/PCBM blend films.

Optical Absorption Enhancement in Polymer BHJ thin Film Using Ag Nanostructures: A Simulation Study

2020 ◽  
Vol 16 (4) ◽  
pp. 556-567
Author(s):  
Asma Khalil ◽  
Zubair Ahmad ◽  
Farid Touati ◽  
Mohamed Masmoudi
Keyword(s):  
Absorption Spectrum ◽  
Solar Cell ◽  
Methyl Ester ◽  
Butyric Acid ◽  
Organic Solar Cell ◽  
Short Circuit ◽  
Acid Methyl Ester ◽  
Short Circuit Current ◽  
Acid Methyl ◽  
Butyric Acid Methyl Ester

Background: The photo-absorption and light trapping through the different layers of the organic solar cell structures are a growing concern now-a-days as it affects dramatically the overall efficiency of the cells. In fact, selecting the right material combination is a key factor in increasing the efficiency in the layers. In addition to good absorption properties, insertion of nanostructures has been proved in recent researches to affect significantly the light trapping inside the organic solar cell. All these factors are determined to expand the absorption spectrum and tailor it to a wider spectrum. Objective: The purpose of this investigation is to explore the consequence of the incorporation of the Ag nanostructures, with different sizes and structures, on the photo absorption of the organic BHJ thin films. Methods: Through a three-dimensional Maxwell solver software, Lumerical FDTD, a simulation and comparison of the optical absorption of the three famous organic materials blends poly(3- hexylthiophene): phenyl C71 butyric acid methyl ester (P3HT:PCBM), poly[N-9″-heptadecanyl-2,7- carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)]: phenyl C71 butyric acid methyl ester (PCDTBT:PCBM) and poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b′]dithiophene)-alt- 4,7-(2,1,3-benzothiadiazole)]: phenyl C71 butyric acid methyl ester (PCDPDTBT:PCBM) has been conducted. Furthermore, FDTD simulation study of the incorporation of nanoparticles structures with different sizes, in different locations and concentrations through a bulk heterojunction organic solar cell structure has also been performed. Results: It has been demonstrated that embedding nanostructures in different locations of the cell, specifically in the active layer and the hole transporting layer had a considerable effect of widening the absorption spectrum and increasing the short circuit current. The effect of incorporation the nanostructures in the active layer has been proved to be greater than in the HTL. Furthermore, the comparison results showed that, PCDTBT:PCBM is no more advantageous over P3HT:PCBM and PCPDTBT:PCBM, and P3HT:PCBM took the lead and showed better performance in terms of absorption spectrum and short circuit current value. Conclusion: This work revealed the significant effect of size, location and concentration of the Ag nanostructures while incorporated in the organic solar cell. In fact, embedding nanostructures in the solar cell widen the absorption spectrum and increases the short circuit current, this result has been proven to be significant only when the nanostructures are inserted in the active layer following specific dimensions and structures.

Sterically controlled azomethine ylide cycloaddition polymerization of phenyl-C61-butyric acid methyl ester

2016 ◽  
Vol 52 (36) ◽  
pp. 6107-6110 ◽  
Author(s):  
Meera Stephen ◽  
Hasina H. Ramanitra ◽  
Hugo Santos Silva ◽  
Simon Dowland ◽  
Didier Bégué ◽  
...  
Keyword(s):  
Thin Films ◽  
Methyl Ester ◽  
Butyric Acid ◽  
Acid Methyl Ester ◽  
Azomethine Ylide ◽  
Acid Methyl ◽  
Butyric Acid Methyl Ester ◽  
Solution Processable

PCBM is polymerised using the SACAP route to give solution processable thin films and raised LUMOs.

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