https://scholars.lib.ntu.edu.tw/handle/123456789/392243
標題: | Efficient Vacuum-Deposited Tandem Organic Solar Cells with Fill Factors Higher Than Single-Junction Subcells | 作者: | Shim, H.-S. Lin, F. Kim, J. Sim, B. Kim, T.-M. Moon, C.-K. Wang, C.-K. Seo, Y. Wong, K.-T. Kim, J.-J. KEN-TSUNG WONG |
關鍵字: | interconnection units; recombination layers; tandem organic photovoltaics; vacuum processes | 公開日期: | 2015 | 卷: | 5 | 期: | 13 | 來源出版物: | Advanced Energy Materials | 摘要: | Efficient vacuum-deposited tandem organic photovoltaic cells (TOPVs) composed of pristine fullerenes as the acceptors and two complementary absorbing donors, 2-((2-(5-(4-(diphenylamino)phenyl)thieno[3,2-b]thiophen-2-yl)thiazol-5-yl)methylene)malononitrile for the visible absorption and 2-((7-(5-(dip-tolylamino)thiophen-2-yl)benzo[c]-[1,2,5]thiadiazol-4-yl)methylene)malononitrile for the near-infrared absorption, are reported. Two subcells are connected by the interconnection unit (ICU) composed of electron-transporting layer/metal/p-doped hole-transporting layer. The p-doped layer in the ICU enables increasing the short-circuit current density (J SC) of TOPVs by tuning the relative position of subcells in the tandem devices to have the maximum optical field distribution response, which is well matched with theoretical calculation. Moreover, the introduction of the doped layer benefits to the higher fill factor (FF) of the consisting subcells without losing open-circuit voltage (V OC) even with the thick active layers. As a result, power conversion efficiency of 9.2% is achieved with higher FF of 0.62 than that of single-junction subcells (0.54, 0.57), J SC of 8.7 mA cm-2, and V OC of 1.71 V using 80 nm thick active layers in both subcells. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-84937024513&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/392243 |
DOI: | 10.1002/aenm.201500228 | SDG/關鍵字: | Infrared devices; Intensive care units; Light absorption; Open circuit voltage; Photoelectrochemical cells; Photovoltaic cells; Electron transporting layer; interconnection units; Optical field distribution; Organic photovoltaic cells; Organic photovoltaics; Power conversion efficiencies; Recombination layers; Vacuum process; Organic solar cells |
顯示於: | 化學系 |
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