Jiahong Optoelectronics

Suzhou, China

Jiahong Optoelectronics

Suzhou, China

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Ye G.,Northwest University, China | Ye G.,CAS National Center for Nanoscience and Technology | Chen S.,CAS National Center for Nanoscience and Technology | Xiao Z.,CAS National Center for Nanoscience and Technology | And 3 more authors.
Journal of Materials Chemistry | Year: 2012

Two novel 56π-electron fullerenes, o-quinodimethane-methano[60]fullerene (OQMF) and thieno-o-quinodimethane-methano[60]fullerene (TOQMF), were prepared by Diels-Alder reaction between methano[60]fullerene and o-quinodimethane type dienes. These fullerenes possess not only high LUMO levels but also sterically small addends, featuring outstanding performance in polymer solar cells. Up to 5.74% and 5.51% PCEs were achieved for OQMF/P3HT and TOQMF/P3HT solar cells, respectively. © 2012 The Royal Society of Chemistry.


Cao J.,CAS National Center for Nanoscience and Technology | Cao J.,University of Chinese Academy of Sciences | Liao Q.,CAS National Center for Nanoscience and Technology | Du X.,CAS National Center for Nanoscience and Technology | And 5 more authors.
Energy and Environmental Science | Year: 2013

A D-A conjugated polymer (PThTPTI) was developed by using a brand new pentacyclic aromatic lactam acceptor unit (TPTI). PThTPTI possesses good light absorption, thermal stability, and a deep HOMO level. PThTPTI/PC71BM cells afford an outstanding PCE up to 7.80%, with high Voc (0.87 V), Jsc (13.69 mA cm-2) and FF (65.6%), and over 70% EQE in the range of 435-640 nm. © 2013 The Royal Society of Chemistry.


Gao J.,Shandong Normal University | Gao J.,CAS National Center for Nanoscience and Technology | He D.,CAS National Center for Nanoscience and Technology | Zhang W.,CAS National Center for Nanoscience and Technology | And 4 more authors.
Synthetic Metals | Year: 2012

A new acceptor unit, 2-alkyl-thieno[3,4-b]imidazole, was synthesized through an annulation reaction between a 3,4-diaminothiophene derivative and a carboxyl acid or an acyl chloride, and was used for developing donor-acceptor conjugated copolymers. Copolymerization of 2-alkyl-thieno[3,4-b]imidazole and benzo[1,2-b:3,4-b′]dithiophene (BDT) or dithieno[3,2-b:2′,3′- d]silole (DTS) afforded 6 new low bandgap polymers P1-P6. These polymers possess intensive absorption at 400-650 nm and the optical bandgaps are in the range of 1.69-1.88 eV. They were firstly applied in polymer solar cells and the best efficiency of 0.72% was obtained from P2/PC 71BM cells fabricated using a dip-coating method. © 2012 Elsevier B.V. All rights reserved.


Liu Y.,Xiangtan University | Liu Y.,CAS National Center for Nanoscience and Technology | Du X.,CAS National Center for Nanoscience and Technology | Xiao Z.,CAS National Center for Nanoscience and Technology | And 4 more authors.
Synthetic Metals | Year: 2012

Three new low bandgap donor-acceptor-donor (D-A-D) type small molecules (M1-M3) containing naphthalene, thiophene, and diketopyrrolopyrrole were synthesized by Suzuki and Stille coupling reactions. The thermal, optical, electrochemical and photovoltaic properties of these molecules were investigated. These materials possess strong absorption at 475-750 nm and low-lying HOMO levels (-5.28 to -5.35 eV). Solution-processed bulk heterojunction solar cells based on M1-M3/PC 71BM blends (1:1, w/w) demonstrate power conversion efficiencies (PCEs) as high as 2.59%, with a short-circuit current density (J sc) of 6.83 mA/cm 2, and an open-circuit voltage (V oc) of 0.88 V under AM1.5G irradiation (100 mW/cm 2). Naphthalene-ended M1 and M3 show higher photovoltaic performance than M2 due to broad absorption and better morphology of the devices. © 2012 Elsevier B.V. All rights reserved.


Liu Y.,Shaanxi Normal University | Liu Y.,CAS National Center for Nanoscience and Technology | Du X.,CAS National Center for Nanoscience and Technology | Cao J.,CAS National Center for Nanoscience and Technology | And 6 more authors.
Synthetic Metals | Year: 2012

N-alkylaziridino[60]fullerenes (NAAFs) were synthesized through the reaction of C 60 and primary alkylamines with the aid of di(acetoxyiodo)benzene (DIB) and I 2 under mild conditions. The NAAFs exhibit similar LUMO energy levels (-3.82 eV to -3.89 eV), which is comparable with PC 61BM. The NAAFs are thermally stable with the decomposition temperature over 230°C and show good solubility in common organic solvents. Polymer solar cells based on N-phenylethylaziridino[60]fullerene/P3HT (0.5:1, w/w) demonstrated a good power conversion efficiency of 2.92% under the illumination of 86 mW/cm 2. The solar cells kept good performance (PCE = 2.71%) even with a very low fullerene content (N-phenylethylaziridino[60] fullerene/P3HT = 0.3:1, w/w). © 2012 Elsevier B.V. All rights reserved.


Xiao Z.,CAS National Center for Nanoscience and Technology | Ye G.,CAS National Center for Nanoscience and Technology | Liu Y.,CAS National Center for Nanoscience and Technology | Chen S.,CAS National Center for Nanoscience and Technology | And 3 more authors.
Angewandte Chemie - International Edition | Year: 2012

Fusing two in one: The π-electron systems of fullerene and an oligothiophene were conjugately fused by an open-cage process. This led to novel fullerene-oligothiophene chromophores with significantly enhanced light-absorbing capability, which covers a wide spectral range. The fullerene band gap could be tuned to about 1 eV by a chemical approach. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Liao L.,Xiangtan University | Liao L.,CAS National Center for Nanoscience and Technology | Zhang W.,CAS National Center for Nanoscience and Technology | Xiao Z.,CAS National Center for Nanoscience and Technology | And 4 more authors.
Polymer Journal | Year: 2013

We have designed and synthesized a series of two-dimensional conjugated polymers (P1P4) based on a backbone consisting of a BDT donor unit and a thiophene unit, which was grafted with different acceptor groups. These polymers show good solubility, thermal stability, and tunable optical and electrochemical properties. Bulk heterojunction polymer solar cells based on P2 exhibit a PCE of 1.89% and an impressively high Voc of 0.93V. Further efforts to lower the bandgaps of these polymers with the aim to enhance photocurrent are currently ongoing. © 2013 The Society of Polymer Science, Japan (SPSJ) All rights reserved.


Zhang W.,CAS National Center for Nanoscience and Technology | Zhang W.,University of Chinese Academy of Sciences | Cao J.,CAS National Center for Nanoscience and Technology | Cao J.,Xiangtan University | And 5 more authors.
Macromolecular Rapid Communications | Year: 2012

A novel electron-accepting unit cyclopenta[2,1-b:3,4-c']dithiophene-4-one (CPDTO-c'), which is an isomer of CPDTO-b' was developed. CPDTO-c' can be incorporated into the D-A backbone through 5, 7 positions. The 2 position of CPDTO-c' can be easily functionalized with an electron-withdrawing chain. By copolymerizing CPDTO-c' with four different donor units: benzo[1,2-b:4,5-b'] dithiophene (BDT), dithieno[3,2-b:2',3'-d]silole (DTS), carbazole, and fluorene, four new conjugated copolymers P1-P4 were obtained. All these polymers have good solubility and low-lying HOMO energy levels (-5.41 ∼ -5.92 eV). Among them, P1 and P2 exhibit broad absorption and narrow optical bandgaps of 1.91 and 1.72 eV, respectively. Solar cells based on P1/PC71BM afforded a PCE up to 2.72% and a high Voc up to ∼0.9 V. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Cao J.,Xiangtan University | Cao J.,CAS National Center for Nanoscience and Technology | Zhang W.,CAS National Center for Nanoscience and Technology | Xiao Z.,CAS National Center for Nanoscience and Technology | And 4 more authors.
Macromolecules | Year: 2012

Two low-bandgap polymers P1 and P2 were synthesized by copolymerization of benzo[1,2-b:4,5-c']-dithiophene-4,8-dione (BDTD) with benzo-[1,2-b:4,5-b'] dithiophene (BDT) and dithieno[3,2- b:2',3'-d]silole (DTS), respectively. Thermogravimetric analyses of P1 and P2 were found and the temperature of 5% weight-loss was selected as the onset point of decomposition. Both the polymers are found to exhibit low-lying HOMO and good light-absorption properties. The absorption spectra of the polymers in chloroform and films are found to be of the range of 500-650 nm. The optimized weight ratios for P1 and P2 both are found to be 1:1.5. The AFM images show the morphology change for the polymer/PC61BM composite films and the rms roughness for the film is found to decrease from 6.94 to 0.47 nm. P2 device exhibits higher external quantum efficiency (EQE) than that of P1, which is due to stronger sunlight absorption of P2 film.


Zhang C.,CAS National Center for Nanoscience and Technology | Chen S.,CAS National Center for Nanoscience and Technology | Xiao Z.,CAS National Center for Nanoscience and Technology | Zuo Q.,Jiahong Optoelectronics | Ding L.,CAS National Center for Nanoscience and Technology
Organic Letters | Year: 2012

A series of mono- and bisadducts of thieno-o-quinodimethane with C 60 (TOQC) was efficiently prepared through the Diels-Alder reaction of pristine or solubilizing side-chain-substituted 2,3-bis(chloromethyl) thiophene with C 60. The pristine TOQC bisadduct (bis-TOQC) shows much higher performance than the side-chain-substituted TOQC bisadducts in polymer solar cells, while the situation is inverse for the TOQC monoadducts. The best power conversion efficiency of 5.1% was achieved from the bis-TOQC:P3HT solar cells under simulated AM1.5G irradiation (86 mW/cm 2). © 2012 American Chemical Society.

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