58047-48-6Relevant academic research and scientific papers
Asymmetric squarylium derivative, an organic thin-film solar cell comprising the same donor material and using the same
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Paragraph 0055-0057, (2018/05/31)
PROBLEM TO BE SOLVED: To provide a squarilium derivative that is a new compound useful for providing a high efficiency organic thin film solar cell, in which reverse electron transfer is slow, and that is suitable for a donor material to an acceptor material having a high symmetric property; a donor material comprising the same; and an organic thin film solar cell using the same.SOLUTION: An organic thin film solar cell in which at least one layer of an organic layer is laminated between a pair of electrodes includes a layer comprising an asymmetric squarilium derivative represented by the following general formula (1). (In the formula (1), one of substituents R, Ris a substituted or unsubstituted aromatic hydrocarbon group, and the other is a substituted or unsubstituted aliphatic hydrocarbon group.)
N,N-Diarylamino end-capping as a new strategy for simultaneously enhancing open-circuit voltage, short-circuit current density and fill factor in small molecule organic solar cells
Yang, Daobin,Zhu, Youqin,Jiao, Yan,Yang, Lin,Yang, Qianqian,Luo, Qian,Pu, Xuemei,Huang, Yan,Zhao, Suling,Lu, Zhiyun
, p. 20724 - 20733 (2015/03/30)
A series of new asymmetrical squaraine derivatives bearing N,N-diarylamino substituents as end-capping groups, namely ASQAr-1-6, were designed and synthesized. In comparison with the reference compound ASQB bearing a N,N-diisobutylamino end-capper, all the six target compounds exhibit improved thermal stability, red-shifted and broadened absorption bands as well as lower HOMO and LUMO energy levels. Despite the hole mobility of most of the compounds still being lower than that of ASQB, solution-processed bulk-heterojunction small molecule organic solar cells (BHJ-SMOSCs) using ASQAr-1-6 as electron donor materials all show drastically higher power conversion efficiency (PCE, 3.08-3.69%) than that of the ASQB-based reference device (PCE = 1.54%). The much enhanced photovoltaic performance of BHJ-SMOSCs based-on ASQAr-1-6 could be attributed to the simultaneously enhanced open-circuit voltage (Voc, 0.81-0.87 V vs. 0.75 V), short-circuit current density (Jsc, 8.07-9.06 mA cm-2vs. 5.40 mA cm-2), and fill factor (FF, 0.45-0.47 vs. 0.38) relative to those of the reference ASQB-based device.
