Synthesis, Hole Mobility, and Photovoltaic Properties of Cross-Linked Polythiophenes with Vinylene−Terthiophene−Vinylene as Conjugated Bridge

2007 ◽  
Vol 40 (6) ◽  
pp. 1831-1837 ◽  
Author(s):  
Erjun Zhou ◽  
Zhan'ao Tan ◽  
Yi Yang ◽  
Lijun Huo ◽  
Yingping Zou ◽  
...  
Keyword(s):  
Hole Mobility ◽  
Photovoltaic Properties

Effect of Branched Conjugation Structure on the Optical, Electrochemical, Hole Mobility, and Photovoltaic Properties of Polythiophenes

2006 ◽  
Vol 110 (51) ◽  
pp. 26062-26067 ◽  
Author(s):  
Erjun Zhou ◽  
Zhan'ao Tan ◽  
Lijun Huo ◽  
Youjun He ◽  
Chunhe Yang ◽  
...  
Keyword(s):  
Hole Mobility ◽  
Photovoltaic Properties

scholarly journals Steady Enhancement in Photovoltaic Properties of Fluorine Functionalized Quinoxaline-Based Narrow Bandgap Polymer

Molecules ◽  
2018 ◽  
Vol 24 (1) ◽  
pp. 54 ◽  
Author(s):  
Zhonglian Wu ◽  
Huanxiang Jiang ◽  
Xingzhu Wang ◽  
Lei Yan ◽  
Wei Zeng ◽  
...  
Keyword(s):  
Fill Factor ◽  
Polymer Solar Cells ◽  
Short Circuit ◽  
Photovoltaic Performance ◽  
Hole Mobility ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Promising Candidate ◽  
Photovoltaic Properties ◽  
Narrow Bandgap

To investigate the influence of fluoride phenyl side-chains onto a quinoxaline (Qx) unit on the photovoltaic performance of the narrow bandgap (NBG) photovoltaic polymers, herein, two novel NBG copolymers, PBDTT-DTQx and PBDTT-DTmFQx, were synthesized and characterized. 2-ethylhexylthiothiophene-substituted benzodithiophene (BDTT), 2,3-diphenylquinoxaline (DQx) [or 2,3-bis(3-fluorophenyl)quinoxaline (DmFQx)] and 2-ethylhexylthiophene (T) were used as the electron donor (D) unit, electron-withdrawing acceptor (A) unit and π-bridge, respectively. Compared to non-fluorine substituted PBDTT-DTQx, fluoride PBDTT-DTmFQx exhibited a wide UV-Vis absorption spectrum and high hole mobility. An enhanced short-circuit current (Jsc) and fill factor (FF) simultaneously gave rise to favorable efficiencies in the polymer/PC71BM-based polymer solar cells (PSCs). Under the illumination of AM 1.5G (100 mW cm−2), a maximum power conversion efficiency (PCE) of 6.40% was achieved with an open-circuit voltage (Voc) of 0.87 V, a Jsc of 12.0 mA cm−2 and a FF of 61.45% in PBDTT-DTmFQx/PC71BM-based PSCs, while PBDTT-DTQx-based devices also exhibited a PCE of 5.43%. The excellent results obtained demonstrate that PBDTT-DTmFQx by fluorine atom engineering could be a promising candidate for organic photovoltaics.

Synthesis and photovoltaic properties of low band gap quarterthiophenes-alt-diketopyrrolopyrroles polymers having high hole mobility

2012 ◽  
Vol 104 ◽  
pp. 185-192 ◽  
Author(s):  
Seon Kyoung Son ◽  
Bong Soo Kim ◽  
Chun-Young Lee ◽  
Joong Suk Lee ◽  
Jeong Ho Cho ◽  
...  
Keyword(s):  
Band Gap ◽  
Hole Mobility ◽  
Photovoltaic Properties ◽  
Low Band Gap

scholarly journals Regioisomer effects of [70]PCBM on film structures and photovoltaic properties of composite films with a crystalline conjugated polymer P3HT

RSC Advances ◽  
2017 ◽  
Vol 7 (72) ◽  
pp. 45697-45704 ◽  
Author(s):  
Tomokazu Umeyama ◽  
Sho Shibata ◽  
Tetsushi Miyata ◽  
Kensho Igarashi ◽  
Tomoyuki Koganezawa ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Composite Films ◽  
Hole Mobility ◽  
Photovoltaic Properties

The β-isomer of [70]PCBM induced a face-on P3HT packing, resulting in the superior hole mobility and photovoltaic properties.

The Influence of Interchain Branches on Solid State Packing, Hole Mobility and Photovoltaic Properties of Poly(3-hexylthiophene) (P3HT)

2007 ◽  
Vol 28 (17) ◽  
pp. 1781-1785 ◽  
Author(s):  
Guoli Tu ◽  
Askin Bilge ◽  
Sylwia Adamczyk ◽  
Michael Forster ◽  
Ralf Heiderhoff ◽  
...  
Keyword(s):  
Solid State ◽  
Hole Mobility ◽  
Photovoltaic Properties

scholarly journals Solution-Processed Bulk Heterojunction Solar Cells with Silyl End-Capped Sexithiophene

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Jung Hei Choi ◽  
Mohamed E. El-Khouly ◽  
Taehee Kim ◽  
Youn-Su Kim ◽  
Ung Chan Yoon ◽  
...  
Keyword(s):  
Bulk Heterojunction ◽  
Short Circuit ◽  
Acid Methyl Ester ◽  
Hole Mobility ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Photovoltaic Properties ◽  
Solution Processed ◽  
Heterojunction Solar Cells

We fabricated solution-processed organic photovoltaic cells (OPVs) using substituted two sexithiophenes, a,w-bis(dimethyl-n-octylsilyl)sexithiophene (DSi-6T) and a,w-dihexylsexithiophene (DH-6T), as electron donors, and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) as an electron acceptor. Solution-processed OPVs usingDH-6TandDSi-6Tshowed good photovoltaic properties in spite of their poor solubility. The best performance was observed onDSi-6T : PCBM 1 : 5 (w/w) blend cell with an open circuit voltage (Voc) of 0.63 V, short circuit current density (Jsc) of 1.34 mA/cm2, fill factor (FF) of 55%, and power conversion efficiency of 0.44% under AM 1.5 G illumination. AlthoughDH-6Thas higher hole mobility thanDSi-6T, theDSi-6T : PCBM blend cell showed higher hole mobility thanDH-6T : PCBM cell. Therefore,DSi-6Tcell showed higher device performance thanDH-6Tcell due to its silyl substitutions, which lead to the increase of the solubility. The incorporation of solution-processed TiO2interfacial layer in theDSi-6T : PCBM devices significantly enhances FF due to the reduced charge recombination near active layer/Al interface.

Synthesis, hole mobility, and photovoltaic properties of two alternating poly[3-(hex-1-enyl)thiophene-co-thiophene]s

2007 ◽  
Vol 45 (4) ◽  
pp. 629-638 ◽  
Author(s):  
Erjun Zhou ◽  
Zhan'ao Tan ◽  
Youjun He ◽  
Chunhe Yang ◽  
Yongfang Li
Keyword(s):  
Hole Mobility ◽  
Photovoltaic Properties

Indeno[1,2-b]fluorene-based novel donor–acceptor conjugated copolymers

2017 ◽  
Vol 30 (2) ◽  
pp. 192-201 ◽  
Author(s):  
Ying Sun ◽  
Xiaojing Ding ◽  
Xueqin Zhang ◽  
Qizan Huang ◽  
Baoping Lin ◽  
...  
Keyword(s):  
Photovoltaic Performance ◽  
Hole Mobility ◽  
Molecular Geometry ◽  
Strong Electron ◽  
Photovoltaic Properties ◽  
Polymer Backbone ◽  
Photovoltaic Efficiency ◽  
Donor Acceptor ◽  
Electron Deficiency ◽  
Conjugated Copolymers

A series of conjugated copolymers based on indeno[1,2-b]fluorene as donor unit with different acceptor units have been synthesized to explore the influences of molecular backbone planarization and acceptor electronegativity on charge transport and photovoltaic properties. Polymer incorporating 2,3-diphenylquinoxaline acceptor moiety shows poor light-harvesting capacity and inferior photovoltaic efficiency of 0.5% due to twisted geometry. By introducing the stronger acceptor thiadiazolo[3,4-c]pyridine in polymer, intramolecular charge transfer is enhanced, giving rise to improved absorption property and photovoltaic efficiency of 1.39%. However, the polymer backbone is still twisted. When thiophene-flanked diketopyrrolopyrrole (DPP) is incorporated as electron acceptor, the polymer exhibits a more planar molecular geometry, yielding a broader and red-shifted absorption spectrum as well as a significantly improved hole mobility of 1.46E-2 cm2 V−1 s−1. However, the photovoltaic device efficiency is only enhanced to be 1.69%. The low-lying lowest unoccupied molecular orbital of −3.95 eV as a result of the strong electron deficiency of the DPP unit may lead to the inefficient charge dissociation and increase the charge recombination, which may give rise to the limit photovoltaic performance.

scholarly journals 3,6-Carbazole vs 2,7-carbazole: A comparative study of hole-transporting polymeric materials for inorganic–organic hybrid perovskite solar cells

2016 ◽  
Vol 12 ◽  
pp. 1401-1409 ◽  
Author(s):  
Wei Li ◽  
Munechika Otsuka ◽  
Takehito Kato ◽  
Yang Wang ◽  
Takehiko Mori ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Polymeric Materials ◽  
Hole Mobility ◽  
Clean Energy ◽  
Photovoltaic Properties ◽  
Organic Hybrid ◽  
Hybrid Perovskite ◽  
Hole Transporting ◽  
Stille Polycondensation

The ever increasing demand for clean energy has encouraged researchers to intensively investigate environmentally friendly photovoltaic devices. Inorganic–organic hybrid perovskite solar cells (PSCs) are very promising due to their potentials of easy fabrication processes and high power conversion efficiencies (PCEs). Designing hole-transporting materials (HTMs) is one of the key factors in achieving the high PCEs of PSCs. We now report the synthesis of two types of carbazole-based polymers, namely 3,6-Cbz-EDOT and 2,7-Cbz-EDOT, by Stille polycondensation. Despite the same chemical composition, 3,6-Cbz-EDOT and 2,7-Cbz-EDOT displayed different optical and electrochemical properties due to the different connectivity mode of the carbazole unit. Therefore, their performances as hole-transporting polymeric materials in the PSCs were also different. The device based on 2,7-Cbz-EDOT showed better photovoltaic properties with the PCE of 4.47% than that based on 3,6-Cbz-EDOT. This could be due to its more suitable highest occupied molecular orbital (HOMO) level and higher hole mobility.

Photovoltaic Properties of CdTe Nanoparticles-Decorated Titania Nanotubes Arrays

2008 ◽  
Author(s):  
Latika Menon ◽  
Eugen Panaitescu ◽  
Dattatri Nagesha ◽  
Trifon Fitchorov ◽  
John S. Morris ◽  
...  
Keyword(s):  
Titania Nanotubes ◽  
Photovoltaic Properties ◽  
Cdte Nanoparticles
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