Cesium carbonate-doped 1,4,5,8-naphthalene-tetracarboxylic-dianhydride used as efficient electron transport material in polymer solar cells |
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| Affiliation: | 1. Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai 200072, PR China;2. The School of Physical Science and Electronics, Shanxi Datong University, Datong 037009, PR China;1. School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, GA 30332-0400, United States;2. Department of Chemistry, New Mexico Highlands University, Las Vegas, NM 87701, United States;3. Department of Chemistry and Center for Applied Energy Research (CAER), University of Kentucky, Lexington, KY 40506, United States;1. IMS, UMR-CNRS 5218, ENSCBP, IPB, University of Bordeaux, 16 avenue Pey Berland, 33607 Pessac Cedex, France;2. XLIM, UMR-CNRS 7252, University of Limoges, 123 avenue Albert Thomas, 87060 Limoges Cedex, France;1. Ames Laboratory-USDOE and Physics & Astronomy Department, Iowa State University, Ames, IA 50011, USA;2. Ames Laboratory-USDOE and Electrical & Computer Engineering Department, Iowa State University, Ames, IA 50011, USA;3. Ames Laboratory-USDOE and Simpson College, Indianola, IA 50125, USA;4. Microelectronics Research Center and Electrical & Computer Engineering Department, Iowa State University, Ames, IA 50011, USA |
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| Abstract: | The use of appropriate charge carrier transport materials in organic solar cells strongly influences the device performance. In this work, we focused on the molecular electron transport material 1,4,5,8-naphthalene-tetracarboxylic-dianhydride (NTCDA) doped by cesium carbonate (Cs2CO3). We first investigated the electrical properties of such n-type doped material as a function of the doping concentration before using it as electron transport layer (ETL) in polymer solar cells. The doped transparent ETL reduces the series resistance leading to an increased open circuit voltage. A power conversion efficiency of 3.8% was finally achieved in a device with a blend of poly(3-hexylthiophene-2,5-diyl):phenyl-C61-butyric acid methyl ester (P3HT:PCBM) as the active layer and a 5 nm-thick NTCDA:Cs2CO3 film with a molar ratio of 30% as ETL. |
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| Keywords: | Doping Organic semiconductor Polymer solar cell |
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