High‐Performance As‐Cast Nonfullerene Polymer Solar Cells with Thicker Active Layer and Large Area Exceeding 11% Power Conversion Efficiency
Abstract
In this work, a nonfullerene polymer solar cell (PSC) based on a wide bandgap polymer donor PM6 containing fluorinated thienyl benzodithiophene (BDT‐2F) unit and a narrow bandgap small molecule acceptor 2,2′‐((2Z,2′Z)‐((4,4,9,9‐tetrahexyl‐4,9‐dihydro‐s‐indaceno[1,2‐b:5,6‐b′]dithiophene‐2,7‐diyl)bis(methanylylidene))bis(3‐oxo‐2,3‐dihydro‐1H‐indene‐2,1‐diylidene))dimalononitrile (IDIC) is developed. In addition to matched energy levels and complementary absorption spectrum with IDIC, PM6 possesses high crystallinity and strong π–π stacking alignment, which are favorable to charge carrier transport and hence suppress recombination in devices. As a result, the PM6:IDIC‐based PSCs without extra treatments show an outstanding power conversion efficiency (PCE) of 11.9%, which is the record value for the as‐cast PSC devices reported in the literature to date. Moreover, the device performances are insensitive to the active layer thickness (≈95–255 nm) and device area (0.20–0.81 cm2) with PCEs of over 11%. Besides, the PM6:IDIC‐based flexible PSCs with a large device area of 1.25 cm2 exhibit a high PCE of 6.54%. These results indicate that the PM6:IDIC blend is a promising candidate for future roll‐to‐roll mass manufacturing and practical application of highly efficient PSCs.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 13, 2017
- Source ID
- 10.1002/adma.201704546
Entities
People
- Bing Guo
- Bo Wu
- Chennan Ye
- Feng Liu
- Jin Fang
- Maojie Zhang
- Qunping Fan
- Thomas Paul Russell
- Tze Chien Sum
- Wanbin Li
- Wenyan Su
- Xia Guo
- Xuemei Ou
- Yan Wang
- Yongfang Li
- Yufeng Jiang
- Zhixiang Wei
Organizations
- Lawrence Berkeley National Laboratory
- Ministry of Education
- Ministry of Education of the People's Republic of China
- Nanyang Technological University
- National Natural Science Foundation of China
- National Research Foundation
- Natural Science Foundation of Jiangsu Province
- Office of Naval Research
- Royal Institute of Chemistry
- Shanghai Jiao Tong University
- Soochow University