Polydopamine/ZnO electron transport layers enhance charge extraction in inverted non-fullerene organic solar cells

被引：67

作者：

Ahmad, Nafees ^{[1
,2
]}

Zhang, Xuning ^{[1
,3
]}

Yang, Shuo ^{[1
,2
]}

Zhang, Dongyang ^{[1
,3
]}

Wang, Jianqiu ^{[1
]}

Zafar, Saud Uz ^{[1
,2
]}

Li, Yanxun ^{[1
,2
]}

Zhang, Yuan ^{[3
]}

Hussain, Sabir ^{[1
,2
]}

Cheng, Zhihai ^{[4
]}

Kumaresan, Anbu ^{[1
,2
]}

Zhou, Huiqiong ^{[1
]}

机构：

[1] Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, CAS Key Lab Nanosyst & Hierarch Fabricat, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Beihang Univ, Sch Chem, Beijing Adv Innovat Ctr Biomed Engn, Beijing 100191, Peoples R China

[4] Renmin Univ China, Dept Phys, Beijing Key Lab Optoelect Funct Mat & Micronano D, Beijing 100872, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2019年 / 7卷 / 35期

基金：

中国国家自然科学基金;

关键词：

UNDERWATER ADHESION MECHANISM; THIN-FILMS; POLYMER; PERFORMANCE; DEPOSITION; INTERLAYER; CONVERSION; COATINGS; CATECHOL;

D O I：

10.1039/c9tc02781e

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The cathode interlayer plays a key role in the photovoltaic performance in organic solar cells. In this work, we demonstrate that polydopamine/ZnO can be used as efficient electron transport layers (ETL) in inverted non-fullerene organic solar cells. In comparison to the devices with the ZnO ETL, the power conversion efficiency of inverted PBDBT:ITIC solar cells with the PDA/ZnO ETL can be boosted from 10.15% to 11.14%, due to the simultaneously enhanced open-circuit voltage, short-circuit current and fill factor. The increased photovoltaic performance is mainly attributed to a faster charge extraction ability at the cathode interface and longer carrier lifetime, confirmed by transient optoelectrical analyses. Revealed by conductive-AFM and KPFM coupled with absorption spectroscopy, high optical transmittance and vertical electrical conductivity with a suitable low work function and a doping effect induced by PDA were observed in the PDA modified ZnO, which makes it a good ETL material for inverted solar cells and indicated universal applicability. This work provides a new approach to modify the cathode interfacial properties towards high efficiency organic solar cells with non-fullerene acceptors.

引用

页码：10795 / 10801

页数：7