Tuning the thermal conductivity of solar cell polymers through side chain engineering

2014 ◽  
Vol 16 (17) ◽  
pp. 7764-7771 ◽  
Author(s):  
Zhi Guo ◽  
Doyun Lee ◽  
Yi Liu ◽  
Fangyuan Sun ◽  
Anna Sliwinski ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Solar Cell ◽  
Conjugated Polymer ◽  
Side Chain ◽  
Polymer Backbone

Side chain engineering of the conjugated polymer backbone improves its thermal conductivity.

Understanding the impact of side-chains on photovoltaic performance in efficient all-polymer solar cells

2019 ◽  
Vol 7 (40) ◽  
pp. 12641-12649 ◽  
Author(s):  
Bin Li ◽  
Qilin Zhang ◽  
Gaole Dai ◽  
Hua Fan ◽  
Xin Yuan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Conjugated Polymer ◽  
Polymer Solar Cell ◽  
Polymer Solar Cells ◽  
Photovoltaic Performance ◽  
Cell Performance ◽  
Side Chain ◽  
Solar Cell Performance ◽  
The Impact

We performed side-chain fluorination and alkylthio substituent in a template conjugated polymer and further investigate their impact on polymer–polymer solar cell performance.

scholarly journals Side-chain tuning in conjugated polymer photocatalysts for improved hydrogen production from water

2020 ◽  
Vol 13 (6) ◽  
pp. 1843-1855 ◽  
Author(s):  
Duncan J. Woods ◽  
Sam A. J. Hillman ◽  
Drew Pearce ◽  
Liam Wilbraham ◽  
Lucas Q. Flagg ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Conjugated Polymer ◽  
Chemical Structure ◽  
Side Chain ◽  
Side Chains ◽  
Structure Property ◽  
Polymer Backbone ◽  
Solution Processable

Structure–property–activity relationships in solution processable polymer photocatalysts for hydrogen production from water were probed by varying the chemical structure of both the polymer side-chains and the polymer backbone.

An expanded isoindigo unit as a new building block for a conjugated polymer leading to high-performance solar cells

2014 ◽  
Vol 2 (15) ◽  
pp. 5427-5433 ◽  
Author(s):  
Shugang Li ◽  
Zhongcheng Yuan ◽  
Jianyu Yuan ◽  
Ping Deng ◽  
Qing Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Building Block ◽  
Conjugated Polymer ◽  
High Performance ◽  
Fill Factor ◽  
Solar Cell Device ◽  
Donor Acceptor ◽  
First Time

An expanded isoindigo unit (IBTI) has been incorporated into a donor–acceptor conjugated polymer for the first time. The PCE of the solar cell device based on the new polymer reached 6.41% with a fill factor of 0.71.

Coupling between mesogenic units and polymer backbone in side-chain liquid crystal polymers and elastomers

Polymer ◽  
1991 ◽  
Vol 32 (8) ◽  
pp. 1347-1353 ◽  
Author(s):  
G.R. Mitchell ◽  
F.J. Davis ◽  
W. Guo ◽  
R. Cywinski
Keyword(s):  
Liquid Crystal ◽  
Side Chain ◽  
Liquid Crystal Polymers ◽  
Polymer Backbone

scholarly journals Effect of molecular weight on the properties and organic solar cell device performance of a donor–acceptor conjugated polymer

2015 ◽  
Vol 6 (12) ◽  
pp. 2312-2318 ◽  
Author(s):  
Zeyun Xiao ◽  
Kuan Sun ◽  
Jegadesan Subbiah ◽  
Tianshi Qin ◽  
Shirong Lu ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Solar Cell ◽  
Conjugated Polymer ◽  
Organic Solar Cell ◽  
Photophysical Properties ◽  
Device Performance ◽  
Solar Cell Device ◽  
Donor Acceptor

The effect of molecular weight of a conjugated polymer on its photophysical properties and solar cell device performance was investigated.

Isoindigo-based conjugated polymer for high-performance organic solar cell with a high VOC of 1.06 V as processed from non-halogenated solvent

2019 ◽  
Vol 161 ◽  
pp. 113-118 ◽  
Author(s):  
Eui Hyuk Jung ◽  
Hyungju Ahn ◽  
Won Ho Jo ◽  
Jea Woong Jo ◽  
Jae Woong Jung
Keyword(s):  
Solar Cell ◽  
Conjugated Polymer ◽  
Organic Solar Cell ◽  
High Performance

Deposition of Al-Doped Zinc Oxide by Direct Pulsed Laser Recrystallization at Room Temperature on Various Substrates for Solar Cell Applications

2012 ◽  
Author(s):  
Martin Y. Zhang ◽  
Qiong Nian ◽  
Gary J. Cheng
Keyword(s):  
Thin Film ◽  
Thermal Conductivity ◽  
Solar Cell ◽  
Melting Point ◽  
Room Temperature ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Flexible Substrates ◽  
Laser Recrystallization ◽  
Azo Thin Film

In this study, a method combining room temperature pulsed laser deposition (PLD) and direct pulsed laser recrystallization (DPLR) are introduced to deposit superior transparent conductive oxide (TCO) layer on low melting point flexible substrates. As an indispensable component of thin film solar cell, TCO layer with a higher quality will improve the overall performance of solar cells. Alumina-doped zinc oxide (AZO), as one of the most promising TCO candidates, has now been widely used in solar cells. However, to achieve optimal electrical and optical properties of AZO on low melting point flexible substrate is challenging. Recently developed direct pulsed laser recrystallization (DPLR) technique is a scalable, economic and fast process for point defects elimination and recrystallization at room temperature. It features selective processing by only heating up the TCO thin film and preserve the underlying substrate at low temperature. In this study, 250 nm AZO thin film is pre-deposited by pulsed laser deposition (PLD) on flexible and rigid substrates. Then DPLR is introduced to achieve a uniform TCO layer on low melting point flexible substrates, i.e. commercialized Kapton polyimide film and micron-thick Al-foil. Both finite element analysis (FEA) simulation and designed experiments are carried out to demonstrate that DPLR is promising in manufacturing high quality AZO layers without any damage to the underlying flexible substrates. Under appropriate experiment conditions, such as 248 nm in laser wavelength, 25 ns in laser pulse duration, 15 laser pulses at laser fluence of 25 mJ/cm2, desired temperature would result in the AZO thin film and activate the grain growth and recrystallization. Besides laser conditions, the thermal conductivity and crystallinity of the substrate serve as additional factors in the DPLR process. It is found that the substrate’s thermal conductivity correlates positively with the AZO crystal size; the substrate’s crystallinity correlates positively with the AZO film’s crystallinity. The thermal expansion of substrate would also contribute to the film tensile stress after processed by DPLR technique. The overall results indicate that DPLR technique is useful and scalable for flexible solar cell manufacturing.

scholarly journals Variation of the Side Chain Branch Position Leads to Vastly Improved Molecular Weight and OPV Performance in 4,8-dialkoxybenzo[1,2-b:4,5-b′]dithiophene/2,1,3-benzothiadiazole Copolymers

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Robert C. Coffin ◽  
Christopher M. MacNeill ◽  
Eric D. Peterson ◽  
Jeremy W. Ward ◽  
Jack W. Owen ◽  
...  
Keyword(s):  
Thin Film ◽  
Molecular Weight ◽  
Thin Film Transistor ◽  
Power Conversion ◽  
Hole Mobility ◽  
Side Chain ◽  
Side Chains ◽  
Absorption Profile ◽  
Polymer Backbone ◽  
Chain Branch

Through manipulation of the solubilizing side chains, we were able to dramatically improve the molecular weight(Mw)of 4,8-dialkoxybenzo[1,2-b:4,5-b′]dithiophene (BDT)/2,1,3-benzothiadiazole (BT) copolymers. When dodecyl side chains (P1) are employed at the 4- and 8-positions of the BDT unit, we obtain a chloroform-soluble copolymer fraction withMwof 6.3 kg/mol. Surprisingly, by moving to the commonly employed 2-ethylhexyl branch (P2),Mwdecreases to 3.4 kg/mol. This is despite numerous reports that this side chain increases solubility andMw. By moving the ethyl branch in one position relative to the polymer backbone (1-ethylhexyl,P3),Mwis dramatically increased to 68.8 kg/mol. As a result of thisMwincrease, the shape of the absorption profile is dramatically altered, withλmax= 637 nm compared with 598 nm forP1and 579 nm forP2. The hole mobility as determined by thin film transistor (TFT) measurements is improved from~1×10−6 cm2/Vs forP1andP2to7×10−4 cm2/Vs forP3, while solar cell power conversion efficiency in increased to2.91%forP3relative to0.31%and0.19%forP1andP2, respectively.

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