文献类型：期刊文献

中文题名：Selenium cooperated polysulfide electrolyte for efficiency enhancement of quantum dot-sensitized solar cells

英文题名：Selenium cooperated polysulfide electrolyte for efficiency enhancement of quantum dot-sensitized solar cells

作者：Mengsi Zhou[1,2];Gencai Shen[1];Zhenxiao Pan[2];Xinhua Zhong[1,2]

机构：[1]Key Laboratory for Advanced Materials,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China;[2]College of Materials and Energy,South China Agricultural University,Guangzhou 510642,Guangdong,China

年份：2019

卷号：28

期号：11

起止页码：147

中文期刊名：Journal of Energy Chemistry

外文期刊名：能源化学（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2019_2020】；

基金：supported by the National Natural Science Foundation of China (NFSC nos. 51732004 , 91433106 , 21703071 , 21805093)

语种：英文

中文关键词：Quantum;dot-sensitized;solar;cells;Polysulfide;electrolyte;Selenium;Charge;transfer;Counter;electrode

外文关键词：Quantum dot-sensitized solar cells;Polysulfide electrolyte;Selenium;Charge transfer;Counter electrode

摘要：The modification of polysulfide electrolyte with additives has been demonstrated as an effective way to improve the photovoltaic performance of quantum dot-sensitized solar cells(QDSCs). Most of these additives can inhibit the charge recombination processes at photoanode/electrolyte interface and favor the improvement of V oc of cell devices. Herein, we showed that the incorporation of elemental selenium(Se) in polysulfide electrolyte to form polyselenosulfide species can notably improve the performance of QDSCs. Unlike previous reports, we present here an integrated investigation of the effects of polyselenosulfide species in polysulfide electrolyte on the photovoltaic performance of QDSCs from both of the photoanode and counter electrode(CE) aspects. Electrochemical impedance spectroscopy(IS) and opencircuit voltage-decay(OCVD) measurements demonstrated that the introduction of Se into polysulfide electrolyte can not only retard charge recombination at photoanode/electrolyte interface, but also reduce the charge transfer resistance at CE/electrolyte interface, resulting in the improvement of J sc and FF values. Consequently, the average efficiency of Zn-Cu-In-Se QDSCs was improved from 9.26% to 9.78% under AM 1.5 G full one sun illumination.
The modification of polysulfide electrolyte with additives has been demonstrated as an effective way to improve the photovoltaic performance of quantum dot-sensitized solar cells(QDSCs). Most of these additives can inhibit the charge recombination processes at photoanode/electrolyte interface and favor the improvement of V oc of cell devices. Herein, we showed that the incorporation of elemental selenium(Se) in polysulfide electrolyte to form polyselenosulfide species can notably improve the performance of QDSCs. Unlike previous reports, we present here an integrated investigation of the effects of polyselenosulfide species in polysulfide electrolyte on the photovoltaic performance of QDSCs from both of the photoanode and counter electrode(CE) aspects. Electrochemical impedance spectroscopy(IS) and opencircuit voltage-decay(OCVD) measurements demonstrated that the introduction of Se into polysulfide electrolyte can not only retard charge recombination at photoanode/electrolyte interface, but also reduce the charge transfer resistance at CE/electrolyte interface, resulting in the improvement of J sc and FF values. Consequently, the average efficiency of Zn-Cu-In-Se QDSCs was improved from 9.26% to 9.78% under AM 1.5 G full one sun illumination.