Tetrafluoroquinoxaline based polymers for non-fullerene polymer solar cells with efficiency over 9%

被引：94

作者：

Yuan, Jun ^{[1
]}

Qiu, Lixia ^{[1
]}

Zhang, Zhi-Guo ^{[2
]}

Li, Yongfang ^{[2
]}

Chen, Yiwang ^{[4
]}

Zou, Yingping ^{[1
,3
]}

机构：

[1] Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China

[2] Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China

[3] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[4] Nanchang Univ, Coll Chem, Inst Polymers, 999 Xuefu Ave, Nanchang 330031, Peoples R China

来源：

NANO ENERGY | 2016年 / 30卷

基金：

中国国家自然科学基金;

关键词：

Non-fullerene polymer solar cells; Tetrafluoroquinoxaline; Non-fullerene small molecule; Light harvesting; Photovoltaic properties; OPEN-CIRCUIT VOLTAGE; POWER CONVERSION EFFICIENCY; ELECTRON-ACCEPTORS; CONJUGATED POLYMER; SINGLE-JUNCTION; DONOR; BENZODITHIOPHENE; DIKETOPYRROLOPYRROLE; RECOMBINATION; AGGREGATION;

D O I：

10.1016/j.nanoen.2016.10.008

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In order to increase the power conversion efficiency (PCE) of non-fullerene polymer solar cells (PSCs), the absorption spectra of donor and acceptor should be complementary for efficient light harvesting. Here, we designed and synthesized two types of medium bandgap polymers in which two dimension-conjugated benzodithiophene (BDT) (BDTT and BDTPS) was used as the electron donating units and tetrafluoroquinoxaline (ffQx) was used as electron accepting unit, namely PffQx-T and PffQx-PS, for the application as donor in the PSCs with a popular non-fullerene small molecule ITIC as acceptor. Their optical, electrochemical and photovoltaic properties were well investigated. Under AM 1.5G, 100 mW/cm(-2), all the PSCs with the ffQx-based polymers as donor exhibited PCEs over 8% (8.47% for PffQx-T and 9.12% for PffQx-PS). To the best of our knowledge, the PCE of 9.12% is the highest value for BDT-Qx fullerene-free PSCs to date, which is even higher than that of fullerene-based devices.

引用

页码：312 / 320

页数：9

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