1446476-79-4

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Upstream product

• 32281-36-0 4,8-dihydrobenzo[1,2-b:4,5-b']dithiophene-4,8-dione 
• 1448963-22-1 2,3,6,7-tetrabromo-4,8-bis(octyloxy)benzo[1,2-b:4,5-b']dithiophene 
• 1098102-94-3 4,8-bis(octyloxy)benzo[1,2-b:4,5-b']dithiophene 
• 1446476-78-3 5,10-bis((2-ethylhexyl)oxy)dithieno[2,3-d:2′,3′-d ′]benzo[1,2-b:4,5-b′]dithiophene 

Relevant academic research and scientific papers

PDT-S-T: A new polymer with optimized molecular conformation for controlled aggregation and π-π Stacking and its application in efficient photovoltaic devices

The correlation among molecular conformation, the crystallinity of the morphology, propensity for π-π stacking, J- versus H-aggregation, and photovoltaic performance have been studied based on two newly designed polymers, PBDTTT-S-T and PDT-S-T. The results show that more linear backbone structure is helpful to improve photovoltaic properties of the polymer, and therefore, molecular conformation should be considered for molecular design of photovoltaic polymers. Copyright

Synthesis of poly(benzothiadiazole-co-dithienobenzodithiophenes) and effect of thiophene insertion for high-performance polymer solar cells

We describe herein the synthesis of novel donor-acceptor conjugated polymers with dithienobenzodithiophenes (DTBDT) as the electron donor and 2,1,3-benzothiadiazole as the electron acceptor for high-performance organic photovoltaics (OPVs). We studied the effects of strategically inserting thiophene into the DTBDT as a substituent on the skeletal structure on the opto-electronic performances of fabricated devices. From UV/Vis absorption, electrochemical, and field-effect transistor analyses, we found that the thiophene-containing DTBDT derivative can substantially increase the orbital overlap area between adjacent conjugated chains and thus dramatically enhance charge-carrier mobility up to 0.55cm2 V-1 s-1. The outstanding charge-transport characteristics of this polymer allowed the realization of high-performance organic solar cells with a power conversion efficiency (PCE) of 5.1 %. Detailed studies on the morphological factors that enable the maximum PCE of the polymer solar cells are discussed along with a hole/electron mobility analysis based on the space-charge-limited current model. Excellent charge transport: Novel donor-acceptor conjugated polymers with dithienobenzodithiophenes as the electron donor and 2,1,3-benzothiadiazole as the electron acceptor can be used for high-performance organic photovoltaics. The high charge-carrier mobility of copolymer 1 (0.55cm2 V -1 s-1) and its outstanding charge-transport characteristics lead to organic solar cells with a power conversion efficiency (PCE) of 5.1 % (see figure). Copyright

Single-junction organic solar cells based on a novel wide-bandgap polymer with efficiency of 9.7%

A novel wide-bandgap copolymer (PDBT-T1) is developed and applied in organic solar cells, which yield a high efficiency of 9.74% and a high fill factor of 75%. The high photovoltaic performance is due to efficient photogenerated exciton dissociation and charge collection in PDBT-T1-based solar cells. The results show that PDBT-T1 is an outstanding candidate as a wide-bandgap material for tandem (or multi-junction) organic solar cells.

Lateral Extension of a Benzodithiophene System: Construction of Heteroacenes Containing Various Chalcogens

A series of linear acenes with five fused rings, which contain thiophene, selenophene, and tellurophene as the outmost rings, have been synthesized from well-known benzodithiophene (BDT). It was found that the optical, electrochemical properties and crystal packing motifs could be modulated by changing heteroatoms in the outmost rings.

Synthesis, characterization and photovoltaic properties of dithienobenzodithiophene-based conjugated polymers

Two new donor-acceptor typed conjugated polymers (P1 and P2) based on the large coplanar and more-extended donor dithieno[2,3-d:2,3-d′]benzo[1,2-b:4,5-b′]dithiphene and thienopyrroledione (TPD) units were synthesized. P1 and P2 have the same polymer backbone, but with different side chains, where P1 has 2-ethylhexyl side chains and P2 has the longer branched 4-ethyoctyl side chains. The solubility measurements show that P2 with longer branched 4-ethyloctyl side chain has better solubility in organic solvents than that of P1. The optical, electrochemical and photovoltaic properties were investigated. P1 and P2 show the very same absorption features in both solution and film states indicating an enhanced molecular planarity of the polymer chains in P1 and P2, which benefits from the large coplanar dithieno[2,3-d:2,3-d′]benzo[1,2-b:4,5-b′]dithiphene unit. The band-gaps of P1 and P2 are at 1.83?eV and 1.74?eV, respectively. The solar cells with P1 or P2 as the electron donor component and PC71BM as the electron acceptor were fabricated and measured under AM 1.5G illumination at 100?mW?cm?2. The results show that the P2/PC71BM-based device showed a moderate power conversion efficiency of 2.86%, which is ～50% improvement in comparison with P1/PC71BM-based device.

Benzodithienothiophene derivatives and organic photovoltaic cell using the same

The present invention relates to a benzodithienothiophene derivative and an organic solar cell using the same. The benzodithienothiophene derivative of the present invention is a compound that has a benzodithienothiophene, which is an electron donor within a molecule, and at the same time has an alkyl group, which is an electron acceptor, and has high solubility. The organic solar cell using the same as an active layer material has excellent oxidation stability and a high open circuit voltage value and current density.

new organic semiconductor compound and a method for manufacturing the same

The present invention provides an organic semiconductor compound that can be used as an organic electronic material, to a method for preparing same, to a photoactive layer containing same, and to an organic photovoltaic cell comprising the photoactive layer. The photoactive layer containing the organic semiconductor compound according to the present invention enables a solution process, and the organic photovoltaic cell comprising the photoactive layer has high efficiency.

Synthetically controlling the optoelectronic properties of dithieno[2,3-d:2′,3′-d′]benzo[1,2-b:4,5-b′] dithiophene-alt-diketopyrrolopyrrole-conjugated polymers for efficient solar cells

We have demonstrated that, by changing the substituent groups on dithieno[2,3-d:2′,3′-d′]benzo[1,2-b:4,5-b′]dithiophene (DTBDT), one could effectively and rationally tune the energy levels, optical band gaps and charge transporting properties, etc. of the DTDBT derivatives (DTBDTs) and their conjugated polymers (CPs) and diketopyrrolopyrrole (DPP) derivatives. the Partner Organisations 2014.