| 芴-呋喃苯并噻二唑共聚物的光电性能 |
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| 引用本文： | 罗洁,阳仁强,杨伟,曹镛. 芴-呋喃苯并噻二唑共聚物的光电性能[J]. 中国科学:化学, 2010, 40(2): 161-166 |
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| 作者姓名： | 罗洁 阳仁强 杨伟 曹镛 |
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| 作者单位： | ① 华南理工大学高分子光电材料与器件研究所; 特种功能材料及其制备新技术教育部重点实验室, 广州 510640② 广东工业大学实验教学部, 广州 510006 ③ 中国科学院青岛生物能源与过程研究所, 青岛 266101 |
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| 基金项目： | 国家重点基础研究发展计划(编号: 2009CB623601)和国家自然科学基金(批准号: 50433030)资助 |
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| 摘 要： | 对芴-呋喃苯并噻二唑共聚物的吸收光谱、光致发光光谱、电致发光性能和光伏性能进行了研究. 共聚物在382 nm和530 nm处有两处明显的吸收峰, 其中530 nm处的吸收强度随着共聚物中呋喃苯并噻二唑单元(FBT)含量的增加而增加. 随着FBT单元含量的增加, 电致发光峰值从611 nm红移至702 nm. 以PVK为空穴传输层, 共聚物PFO- FBT0.1为发光层的发光器件, 在33 mA/cm2电流密度下的外量子效率达2.32%, 亮度为441 cd/m2. 实验中观察到快速的链内能量陷阱过程(从芴到FBT单元). 以共聚物PFO-FBT50为电子给体、PCBM为电子受体(重量比1:2)共混制备的光电池能量转换效率为1.13%, 开路电压0.85 V, 短路电流3.39 mA/cm2, 光谱响应边延伸至近750 nm.
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| 关 键 词： | 芴-呋喃苯并噻二唑 共聚物 发光性能 光伏性能 |
| 收稿时间： | 2009-04-17 |
| 修稿时间： | 2009-04-20 |
Optoelectronic properties of fluorene-co-4,7-difuran-2,1,3-benzothiadiazole copolymers |
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| LUO Jie,,YANG RenQiang,YANG Wei , CAO Yong Institute of Polymer Optoelectronic Material , Devices,Key Laboratory of Specially Functional Materials , Advanced Manufacturing Technology,South China University of Technology,Guangzhou ,China, Experimental Teaching Center,Guangdong University of Technology,Guangzhou , Qingdao Institute of Bioenergy , Bioprocess Technology,Chinese Academy of Sciences,Qingdao. Optoelectronic properties of fluorene-co-4,7-difuran-2,1,3-benzothiadiazole copolymers[J]. Scientia Sinica Chimica, 2010, 40(2): 161-166 |
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| Authors: | LUO Jie YANG RenQiang YANG Wei & CAO Yong Institute of Polymer Optoelectronic Material Devices Key Laboratory of Specially Functional Materials Advanced Manufacturing Technology South China University of Technology Guangzhou China Experimental Teaching Center Guangdong University of Technology Guangzhou Qingdao Institute of Bioenergy Bioprocess Technology Chinese Academy of Sciences Qingdao |
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| Affiliation: | 1 Institute of Polymer Optoelectronic Material and Devices; Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology, South China University of Technology, Guangzhou 510640, China; 2 Experimental Teaching Center, Guangdong University of Technology, Guangzhou 510006, China; 3 Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China |
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| Abstract: | Light-emitting and photovoltaic properties of copolymers (PFO-FBT) based on 9,9-dioctylfluorene and 4,7-difuran-2,1,3-benzothiadiazole (FBT) units were investigated. The copolymers show two absorbance peaks at around 382 nm and 530 nm, respectively. The relative absorbance at around 530 nm of the PFO-FBT copolymers increases with the FBT content. The EL emissions are red-shifted from 611 nm to 702 nm with increasing the FBT content in the copolymer. The highest EL external quantum efficiency achieved with the device configuration of ITO/PEDOT/PVK/PFO-FBT0.1/Ba/Al is 2.32% with the luminance of 441.3 cd/m2 at a current density of 33 mA/cm2. Efficient energy transfer due to exciton trapping on low band-gap FBT sites was observed. The bulk-heterojunction photovoltaic cell used PFO-FBT50 copolymer as the electron donor and methanofullerene [6,6]-phenyl C61 -butyric acid methyl ester (PCBM) as electron acceptor shows an energy conversion efficiency of 1.13% with open-circuit voltage (Voc) of 0.85 V and short-circuit current density (Jsc) of 3.39 mA/cm2 under AM 1.5 solar simulator (100 mW/cm2), and the edge of the spectral photoresponse is at 750 nm. |
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| Keywords: | fluorene-co-furan-benzothiadiazolezz copolymerzz photoluminescencezz photovoltaic cellzz |
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