| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Enhancing the Performance of Organic Solar Cells by Introducing Graphene-based Hole Transfer Layer |
| LIN Shan, SHI Yongtang, WANG Yingying, PANG Beili
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| College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042 |
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Abstract In recent years, organic solar cells (OSCs) has aroused numerous attention thanks to their effective utilization of solar energy and competitive advantages, like low-cost, flexibility, portability and lightweight. Typical OSCs are composed of three parts, namely photoactive layer, interfacial layers (electron transport layer and hole transport layer), and electrodes. Among them, interfacial layers exhibit significant impact on the performance of OSCs device, and appropriate interface layer will be ecceedingly beneficial for the charge extraction and light transmission of the OSCs. Nevertheless, the majority of interfacial layers materials suffer from complex synthnsis approach, high-cost and poor stability, hindering the commercialization of OSCs. Accordingly, it is still a great challenge to design solution-processable, low-cost, highly stably and effective OSCs. In this work, Hummers method was employed to synthesize graphene oxide (GO), hole transport layer for OSCs, aiming at enhancing the performance and stability of OSCs. The morphology and structure of GO was characterized by means of transmission electron microscope (TEM), X-ray electron diffraction (XRD), Raman spectroscope; the optical properties of GO was analyzed by ultraviolet-visible spectrophotometry (UV-Vis); and the performance of OSCs device was evaluated by J-V test. The GO-based OSCs devices with PBDT-BDD:PC71BM as active layer held a power conversion efficiency (PCE) of 7.97%, similar to the conventional PEDOT:PSS-based devices (7.9%). Meanwhile, the GO-based OSCs devices showed a phenomenal increase in stability compared with the conventional one. The former preserved 83% of its original PCE value after storage for 80 d, while the latter remained only 45% of original PCE. Apparently, it can be concluded that GO is a promising hole transport layer material for OSCs, which contributes for the realization of high stability, and low-cost OSCs.
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Published: 31 May 2019
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| Fund:This work was financially supported by the Project of Shandong Province Higher Educational Program (J17KA013). |
| About author:: Shan Lin, graduate student of Qingdao University of Science and Technology. In 2016, she graduated from Qiqihar University with a bachelors degree in inorganic non-metallic materials engineering. She is currently pursuing a masters degree in materials engineering at Qingdao University of Science and Technology. She published a paper in the academic journal of Electrochimica Acta, applying for a national patent. The main research direction of the subject is the preparation and performance of new thin film solar cell electrode materials.Beili Pangreceived B.E. degree in materials chemistry from Ocean University of China in 2006, obtained Ph.D. degree in industrial chemistry from Chungnam National University of Korea in 2014. She entered the postdoctoral mobile station of the School of Materials Science and Engineering of Qingdao University of Science and Technology in 2014 and is currently a lecturer and master in 2016. At present, there are more than 10 academic papers published in Carbon, Electrochimica Acta, RSC Advances, Applied Surface Science, Materials Science and Engineering: B, and other domestic and foreign academic journals, including 12 articles in SCI and 1 national invention patent. The main research work is the preparation and performance of graphene materials and the preparation, characterization and device assembly of new solar cell materials. |
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2019, Vol. 33 
