Efficient ternary bulk heterojunction solar cells with PCDTBT as hole-cascade material
Publication in refereed journal


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摘要Ternary bulk hetero-junction (BHJ) architecture for organic solar cells has been developed to enhance the power conversion efficiency (PCE) by expanding the light absorption range and smoothing the energy level at the BHJ interface. In this work, we report on a ternary polymer blend solar cell with two donor materials, polythieno[3,4-b]-thiophene/benzodithiophene (PTB7), poly[N-9"-hepta-decanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole) (PCDTBT), and using C71 -butyric acid methyl ester (PC71BM) as acceptor material. The resultant device shows an optimized PCE of 7.81% (control sample, 7.06%), with an open circuit voltage (V) of 0.76 V, a short circuit current (Jx) of 15.4 mA/cm(2) and a fill factor (FF) of 66.7%. The improved device performance is mainly attributed to the enhanced charge separation, improved hole mobility, and better film morphology. And we find that the third component PCDTBTcan reduce charge recombination in the ternary blend system as well. The results bring new insight into the future development of high efficiency ternary organic solar cells. (C) 2015 Elsevier Ltd. All rights reserved.
著者Xiao YB, Wang H, Zhou S, Yan KY, Xie WG, Guan ZC, Tsang SW, Xu JB
期刊名稱Nano Energy
出版年份2016
月份1
日期1
卷號19
出版社ELSEVIER SCIENCE BV
頁次476 - 485
國際標準期刊號2211-2855
電子國際標準期刊號2211-3282
語言英式英語
關鍵詞BHJ; Energy level; Ternary polymer solar cells; Work function pinning
Web of Science 學科類別Chemistry; Chemistry, Physical; Materials Science; Materials Science, Multidisciplinary; Nanoscience & Nanotechnology; Physics; Physics, Applied; Science & Technology - Other Topics

上次更新時間 2021-03-03 於 01:46