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Organic photovoltaic devices with high open-circuit voltage based on oligothiophene derivatives

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Chinese Chemical Letters 2007年第4期18卷 437-440页

作者： Ping Liu Jia Le Huang Wan Zhang Pan Ming Sheng Huang Wen Ji Deng Yu Liang Mai An Bo Luan Research Institute of Materials Science South China University of Technology Guangzhou 510640 China Department of Applied Physics South China University of Technology Guangzhou 510640 China Gungdong Province Petroleum Chemicals Institute Guangzhou 510665 China

For the purpose of developing organic photovoltaic devices with good performance characteristics, we have fabricated two devices using 4T-CHO, 5T-CHO and PTCDA. The ITO/4T-CHO/PTCDA/Al device has a Voc of 2.45 V and photoelectric conversion efficiency of 2.76%. The ITO/ST-CHO/PTCDA/Al device has a Voc of 2.1 3V and photoelectric conversion efficiency of 2.90%. The two devices have higher Voc （2.45 and 2.13 V）. It is possible that intennolecular hydrogen bonding between -CHO group of nT-CHO and carboxylic dianhydride of PTCDA contribute to enhance the efficiency by promoting interracial electron transfer and eliminating the subconducting band trap sites.

关键词： oligothiophene Organic photovoltaic property Device

Luminescence Properties of Europium and Terbium Complexes with Pyridine or Bipyridine Linked oligothiophene Ligand

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Journal of Rare Earths 2007年第S1期25卷 355-357页

作者：刘平梁禄生胡建华张雅敏冯桂菊邓文基 Research Institute of Materials Science South China University of Technology Department of Applied Physics South China University of Technology

With an aim to develop novel luminescence materials, europium and terbium complexes of 2, 5-(2-thiophene)-pyridine (TPY), 5, 5′-bis(5-(2, 2′-bithiophene))-2, 5-pyridine (B2TPY) and 5, 5′-bis(5-(2, 2′-bithiophene))-2, 2′-bipyridine (B2TBPY) were synthesized, and their luminescence properties were studied. The complexes exhibited ligand-sensitized emission, which was typical of Eu(Ⅲ) and Tb(Ⅲ) ions. The excitation spectra of Eu(Ⅲ) and Tb(Ⅲ) complexes with TPY (or B2TPY or B2TBPY) show similar bands as these with the ligands. It suggests that, the excitation energy is absorbed by TPY or B2TPY or B2TBPY, the energy transfers from its excited single state to its triplet state, and finally transfers from the ligands to Eu(Ⅲ) and Tb(Ⅲ) ions. The luminescence of Eu(Ⅲ) and Tb(Ⅲ) ions in the TPY or B2TPY or B2TBPY complexes indicates that the metal ions are efficiently excited by the absorbed energy from excitation of the ligands.

关键词： pyridine bipyridine oligothiophene Eu, Tb complex rare earths

Luminescence Properties of Europium and Terbium Complexes with Pyridine or Bipyridine Linked oligothiophene Ligand

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Luminescence Properties of Europium and Terbium Complexes wi...

2D complex nanostructres of oligothiophene based T-shaped bolamphiphilies

The Fifth International Conference on Rare Earth Development and Application

作者：刘平梁禄生胡建华张雅敏冯桂菊邓文基 Research Institute of Materials Science Department of Applied Physics South China University of Technology

＜正＞With an aim to develop novel luminescence materials,europium and terbium complexes of 2,5-（2-thiophene）- pyridine（TPY）,5,5’-bis（5-（2,2’-bithiophene））-2,5-pyridine（B2TPY）and 5,5’-bis（5-（2,2’-bithiophenè））-2,2’-bi- pyridine（B2TBPY）were synthesized,and their luminescence properties were *** complexes exhibited ligand-sen- sitized emission,which was typical of Eu（Ⅲ）and Tb（Ⅲ）*** excitation spectra of Eu（Ⅲ）and Tb（Ⅲ）complexes with TPY（or B2TPY or B2TBPY）show similar bands as these with the *** suggests that,the excitation energy is ab- sorbed by TPY or B2TPY or B2TBPY,the energy transfers from its excited single state to its triplet state,and finally trans- fers from the ligands to Eu（Ⅲ）and Tb（Ⅲ）*** luminescence of Eu（Ⅲ）and Tb（Ⅲ）ions in the TPY or B2TPY or B2- TBPY complexes indicates that the metal ions are efficiently excited by the absorbed energy from excitation of the ligands.

关键词： pyridine bipyridine oligothiophene Eu,Tb complex rare earths

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2D complex nanostructres of oligothiophene based T-shaped bo...

SYNTHESIS, PROPERTIES AND ELECTROPOLYMERIZATION OF STAR-SHAPED oligothiopheneS WITH HEXAKIS(FLUOREN-2-YL)BENZENE AS CORE

2009年全国高分子学术论文报告会

作者：程晓红董星魏广辉云南大学化学与工程学院教育部自然资源药物化学重点实验室

＜正＞oligothiophene based T-shaped bolaamphilic LC molecules have been *** can exhibit honeycomblike 2D-LC cylinder structures,ranging from squares via triangulars,pentagons

关键词： oligothiophene nanostructure liquid crystal

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Chinese Journal of Polymer Science 2013年第6期31卷 938-945页

作者： Yang Zou Yuan Liu Jin-gui Qin 杨楚罗 Department of Chemistry Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials Wuhan University

Star-shaped oligothiophenes with hexakis（fluoren-2-yl）benzene （HFB） as cores were designed and synthesized. Grafting thiophene units to HFB results in a bond flattening of the core, and makes the molecules a flipping-twist shape. Their thermal, photophysical and electrochemical properties were studied. Highly cross-linked conjugated polymers can be produced by electropolymerization of T1-T3.

关键词： Star-shaped molecules Hexakis(fluoren-2-yl)benzene oligothiophene Electropolymerization.

Theoretical study of structural and electronic properties of oligo(thiophene-phenylene)s in comparison with oligothiophenes and oligophenylenes

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Chinese Chemical Letters 2008年第1期19卷 123-126页

作者： H.Zgou S.M.Bouzzine S.Bouzakraoui M.Hamidi M.Bouachrine Unité de Recherche sur les Macromolécules et Modélisation Faculté des Sciences et TechniquesB.P.509 Boutalamine5200 ErrachidiaMorocco Unité de Chimie Théorique AppliquéeFaculté des Sciences et TechniquesB.P.509 Boutalamine5200 ErrachidiaMorocco Unité de Chimie Théorique Appliquée Faculté des Sciences et TechniquesB.P.509 Boutalamine5200 ErrachidiaMorocco Unité de Recherche sur les Macromolécules et Modélisation Faculté des Sciences et TechniquesB.P.509 Boutalamine5200 ErrachidiaMorocco

In this work, a quantum-chemical investigation on the structural and opto-electronic properties of oligo（thiophene-phenylene）（4TP） is carried out. The results are discussed in comparison with the properties of corresponding oligothiophene （8T） and oligophenylene （8P）. As the opto-electronic properties of this type of conducting polymers are governed by their electronic band gap, we shall also present a comparison among HOMO, LUMO and band gap energies of these three materials.

关键词： Conjugated polymers oligothiophene Oligophenylene Oligo(thiophene-phenylene) DFT

Organic Photovoltaic Properties Based on oligothiophenes

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Chinese Chemical Letters 2006年第7期17卷 903-906页

作者： Ping LIU Wan Zhang PAN Ming Sheng HUANG Wen Ji DENG Research Institute of Materials Science South China University of Technology Guangzhou 510640 Department of Applied Physics South China University of Technology Guangzhou 510640

The ITO/5T/PCH/Al1 device has a short circuit current of 3.4 mA/cm^2, an open circuit voltage of 2.1 V, fill fact of 27.5 % and photoelectric conversion efficiency of 2.5 %.

关键词： oligothiophene organic photovoltaic property device.

Metallated conjugation in small-sized-molecular donors for solution-processed organic solar cells

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Science China Chemistry 2015年第2期58卷 347-356页

作者： Chaohua Cui Yunye Zhang Wallace C.H.Choy Hua Li Wai-Yeung Wong Institute of Molecular Functional Materials Department of Chemistry and Institute of Advanced Materials Hong Kong Baptist University Department of Electrical and Electronic Engineering The University of Hong Kong College of Life and Environmental Sciences & Beijing Engineering Research Center of Food Environment and Public Health Minzu University of China HKBU Institute of Research and Continuing Education Shenzhen Virtual University Park

Four metallated conjugated oligothiophenes, S-1, S-2, S-3 and S-4, with platinum（II） aryleneethynylenes as the electron-rich building block were synthesized to investigate their physicochemical and photovoltaic properties. These small molecules possess fairly low-lying HOMO energy levels which match with the LUMO energy level of the electron acceptor PC70BM （[6,6]-phenyl-C71-butyric acid methyl ester）. Using the simple process of spin-coating solution fabrication technique, S-I：PC70BM （1：4, w/w） based organic solar cells exhibiting a high Voc of 0.913 V, with a PCE value of 0.88% were developed. In contrast, the OSC device based on S-2：PC70BM （3：7, w/w） displayed a higher PCE of 1.59% with a higher Jsc value of 5.89 mA cm^-2. The device based on S-4：PCToBM （1：4, w/w） exhibited a PCE value of 1.56%, with a Voc of 0.917 V.

关键词： platinum acetylide photovoltaics organic solar cell oligothiophene

Structural Analysis of Thermally-Annealed Bulk Heterojunction Films Based on Sexithiophene and Fullerene

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Advances in Materials Physics and Chemistry 2014年第7期4卷 127-133页

作者： Yosei Shibata Takahiro Kono Takahiko Suzuki Yuzuru Narita Fumihiko Hirose Yuji Yoshida Graduate School of Science and Engineering Yamagata University Yonezawa Japan Research Center for Photovoltaic Technologies National Institute of Advanced Industrial Science and Technology Tsukuba Japan

Recently, power conversion efficiencies of organic photovoltaics based on small molecules have been dramatically improved by means of the bulk heterojunction (BHJ) structure. Moreover, to optimize photovoltaic performance, thermal annealing treatments have often been used because of the simplicity of the process. However, the elucidation of effects of thermal annealing treatment on BHJ film structure based on small molecules is still not enough. Here, we report the results of structural analysis with synchrotron radiation of α-sexithiophene:fullerene BHJ films before and after thermal annealing treatment. In particular, the open-circuit voltage was increased to as high as 0.72 V;moreover, the BHJ films based on α-sexithiophene and fullerene were also clearly crystallized by the thermal annealing treatment. In this study, we found that the optimal crystal size existed in BHJ films for high-performance organic photovoltaics.

关键词： Organic Photovoltaics oligothiophene Bulk Heterojunction Structure Thermal Anneal Morphological Control