New conjugated copolymers based on benzo[1,2‐b; 3,4‐b′]dithiophene and derivatives of benzo[g]quinoxaline for bulk heterojunction solar cells

Lee, Po I.; Hsu, Steve Lien‐Chung; Lee, Jung Feng; Chuang, Hung Yi; Lin, P. V. S. K. T.

doi:10.1002/pola.24477

Cited by 12 publications

(14 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compounds 1 -3 were prepared according to the literature. [8,34] Compound 4 was synthesized by a reduction reaction and a substitution reaction. Compound 3 was firstly reduced by Zn powder in NaOH aqueous solution, and then the substitution reaction occurred after 1-bromododecane was added into the mixture.…”

Section: Synthesis and Characterizationmentioning

confidence: 99%

Ethynylene‐Linked Oligomers Based on Benzodithiophene: Synthesis and Photoelectric Properties

Jiang

Wang

et al. 2014

Chin. J. Chem.

View full text Add to dashboard Cite

Two conjugated ethynyl-linked oligomers, oligo(benzodithiophene-ethynylene-benzothiadiazole) (O1) and oligo(benzodithiophene-ethynylene-carbazole) (O2), were synthesized by Sonogashira coupling reaction. Their degrees of polymerization were 7 and 10, respectively. Their photophysical and electrochemical properties were investigated. O1 exhibitd two strong absorption bands at 404 nm and 483 nm, and O2 at 401 nm and 429 nm. The results of UV-Vis, cyclic voltammetry (CV) and theoretical calculations showed that O1 has a narrower band gap than O2. The conductivities of O1 and O2 were 1.05×10 −15 and 6.98×10 −16 S/cm, respectively, and would increase to 1.23×10 −10 and 1.05×10 −10 S/cm after doping with iodine.

show abstract

Section: Synthesis and Characterizationmentioning

confidence: 99%

Ethynylene‐Linked Oligomers Based on Benzodithiophene: Synthesis and Photoelectric Properties

Jiang

Wang

et al. 2014

Chin. J. Chem.

View full text Add to dashboard Cite

show abstract

“…Small organic molecule materials have received considerable attention because of their advantages in determined molecular mass, easy purification, high fluorescent quantum yield, high electroluminescence, and low driving voltage [ 1 , 2 , 3 , 4 ]. Researchers have developed a wide variety of organic optoelectronic materials whose performance can be adjusted through molecular design [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. For example, their solubility can be adjusted by changing the length of the alkyl substituents [ 4 , 5 , 6 ], and their absorption spectrum, carrier mobility, and forbidden band width can be adjusted by changing the type of the substituent [ 7 , 8 , 9 , 10 ] and the link mode [ 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

“…Researchers have developed a wide variety of organic optoelectronic materials whose performance can be adjusted through molecular design [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. For example, their solubility can be adjusted by changing the length of the alkyl substituents [ 4 , 5 , 6 ], and their absorption spectrum, carrier mobility, and forbidden band width can be adjusted by changing the type of the substituent [ 7 , 8 , 9 , 10 ] and the link mode [ 11 , 12 , 13 , 14 ]. The combination of an electron-rich unit, i.e., an electron donor (D), with electron-donating ability, and an electron-deficient unit, i.e., an electron acceptor (A), with electron-withdrawing ability to construct a D–A–D structure is referred as the D–A strategy [ 11 , 12 , 13 , 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

“…Intramolecular charge transfer (ICT) occurs in a D–A molecule, and it affects the molecule’s highest occupied molecular orbital (HOMO), lowest unoccupied molecular orbital (LUMO), and band gap, thereby affecting various optoelectronic properties [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. Combining D or A units with similar structures, changing the heteroatoms, or changing the substituents can affect the properties of D–A-type materials [ 7 , 8 , 9 , 10 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of Pyrazine Derivatives and Substituted Positions on the Photoelectric Properties and Electromemory Performance of D–A–D Series Compounds

Song

Kong

et al. 2018

Materials

View full text Add to dashboard Cite

Pyrazine derivatives quinoxaline and pyridopyrazine were selected as the acceptors, and benzocarbazole was used as the donor to synthesize four different D–A–D compounds. The results showed that 2,3-bis(decyloxy)pyridine[3,4-b]pyrazine (DPP) exhibited stronger electron-withdrawing ability than that of 2,3-bis(decyloxy)quinoxaline (DPx), because DPP possesses one more nitrogen (N) atom, resulting in a red-shift of the intramolecular charge transfer (ICT) absorption bands and fluorescent emission spectra for compounds with DPP as the acceptor compared with those that use DPx as the acceptor. The band-gap energy (Eg) of the four D–A–D compounds were 2.82 eV, 2.70 eV, 2.48 eV, and 2.62 eV, respectively, for BPC-2DPx, BPC-3DPx, BPC-2DPP, and BPC-3DPP. The solvatochromic effect was insignificant when the four compounds were in the ground state, which became significant in an excited state. With increasing solvent polarity, a 30–43 nm red shift was observed in the emissive spectra of the compounds. The thermal decomposition temperatures of the four compounds between 436 and 453 °C had very high thermal stability. Resistor-type memory devices based on BPC-2DPx and BPC-2DPP were fabricated in a simple sandwich configuration, Al/BPC-2DPx/ITO or Al/BPC-2DPP/ITO. The two devices showed a binary non-volatile flash memory, with lower threshold voltages and better repeatability.

show abstract

“…In this structure, an electron‐donating conjugated polymer blends with an electron acceptor, such as [6,6]‐phenyl‐C61‐butyric acid methyl ester (PCBM), as the active layer. The photogenerated excitons can effectively dissociate at the interface between the donor and acceptor, followed by the transport of the separated charges to different electrodes 8–13. The BHJ structure can maximize interfacial area between the donor and the acceptor because of the formation of bicontinuous and interpenetrating networks 14–17.…”

Section: Introductionmentioning

confidence: 99%

Structure modification and annealing effect of polymer bulk heterojunction solar cells based on polyfluorene derivatives

Lee

Hsu

Lee

et al. 2011

J. Polym. Sci. A Polym. Chem.

Self Cite

View full text Add to dashboard Cite

Three low bandgap polyfluorene copolymers containing a donor-acceptor-donor moiety have been synthesized via Suzuki and Stille polymerization reactions. Their bandgaps and molecular energy levels (highest occupied molecular orbital and lowest unoccupied molecular orbital) varied with different polymerization methods. The molecular weight of the copolymer increased significantly through copolymerizing with a monomer having a long alkyl side chain. In order to investigate their photovoltaic properties, polymer solar cell devices based on the copolymers were fabricated with a structure of indium tin oxide/ poly(styrene sulfonic acid)-doped poly(ethylene dioxythiophene)/ copolymers:[6,6]-phenyl-C61-butyric acid methyl ester (PCBM)/ LiF/Al under the illumination of AM 1.5G, 100 mW/cm 2 . We found that the annealing temperature had a profound effect on the power conversion efficiency (PCE) of the devices with a blend of poly[9,9-didodecylfluorene-alt-(bis-thienylene) benzothiadiazole] (PF12-TBT) and PCBM. The PCE of the solar cell based on PF12-TBT/PCBM (1:4) annealing at 70 C for 20 min was 4.13% with an open-circuit voltage (V oc ) of 1.02 V, fill factor of 55.9%, and a short-circuit current (J sc ) of 7.24 mA/cm 2 . V C 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: [4618][4619][4620][4621][4622][4623][4624][4625] 2011

show abstract

New conjugated copolymers based on benzo[1,2‐b; 3,4‐b′]dithiophene and derivatives of benzo[g]quinoxaline for bulk heterojunction solar cells

Cited by 12 publications

References 34 publications

Ethynylene‐Linked Oligomers Based on Benzodithiophene: Synthesis and Photoelectric Properties

Ethynylene‐Linked Oligomers Based on Benzodithiophene: Synthesis and Photoelectric Properties

Effects of Pyrazine Derivatives and Substituted Positions on the Photoelectric Properties and Electromemory Performance of D–A–D Series Compounds

Structure modification and annealing effect of polymer bulk heterojunction solar cells based on polyfluorene derivatives

Contact Info

Product

Resources

About