首页|Solar cells based on doubly concerted companion dyes with the efficiencies modulated by inserting an ethynyl group at different positions

Solar cells based on doubly concerted companion dyes with the efficiencies modulated by inserting an ethynyl group at different positions

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To develop efficient sensitizers for dye-sensitized solar cells(DSSCs),we recently reported doubly con-certed companion(DCC)dye XW83 with a wrapped porphyrin sub-dye unit linked to an organic sub-dye unit through a flexible chain,which exhibits panchromatic absorption and excellent anti-aggregation abil-ity.To further improve the absorption,we herein report XW87 and XW88 by inserting an ethynyl group into the organic sub-dye unit of XW83 near the donor and acceptor,respectively.For the corresponding organic dyes Z3 and Z4,the introduced ethynyl group improves their absorption,but induces aggravated charge recombination,leading to lowered power conversion efficiencies(PCEs).Similar to the organic dyes,the introduced ethynyl group improves the absorption of DCC dyes XW87 and XW88 as well.In addition,the ethynyl group near the acceptor of the organic sub-dye unit can be well protected by the long wrapping chains from the porphyrin unit.As a result,XW88 affords the highest Jsc(21.84 mA/cm2),Voc(782 mV)and PCE(12.2％)among the DCC dyes.These results provide an effective method for devel-oping efficient DSSC dyes by inserting an ethynyl group at a suitable position of a DCC dye.

PorphyrinEthynyl bridgeCharge-recombinationDye sensitized solar cellsDoubly concerted companion dyes

Yuqing Wang、Zhemin Li、Qingjun Lu、Qizhao Li、Jiaxin Luo、Chengjie Li、Yongshu Xie

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Key Laboratory for Advanced Materials,Frontiers Science Center for Materiobiology and Dynamic Chemistry,Institute of Fine Chemicals,School of Chemistry and Molecular Engineering,East China University of Science & Technology,Shanghai 200237,China

国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金Fundamental Research Funds for the Central Universities,Program of Shanghai Academic Research LeaderShanghai Rising-Star Program上海市自然科学基金上海市自然科学基金

2213100522201074220750772197106320XD140140023QA140210023ZR141560022ZR1416100

2024

10.1016/j.cclet.2023.109093

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子：0.771
ISSN：1001-8417
年,卷(期)：2024.35(5)
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