Journal
ACS APPLIED ELECTRONIC MATERIALS
Volume 1, Issue 6, Pages 854-861Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaelm.9b00016
Keywords
polymer solar cells; cathode interlayers; electron-collecting interlayers; fullerene derivatives; postvapor treatment
Funding
- National Natural Science Foundation of China [21674050, 21835003, 61704077, 21422402]
- National Key Basic Research Program of China [2014CB648300, 2017YFB0404501]
- Natural Science Foundation of Jiangsu Province [BK20171007, BK20140060]
- China Postdoctoral Science Foundation [2016M601784, 2017T100358]
- Postdoctoral Science Foundation of Jiangsu Province [1701135B]
- Scientific Foundation [NY218164, NY217169]
- Leading Talent of Technological Innovation of National Ten-Thousands Talents Program of China
- Excellent Scientific and Technological Innovative Teams of Jiangsu Higher Education Institutions [TJ217038]
- Synergetic Innovation Center for Organic Electronics and Information Displays
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Six Talent Peaks Project of Jiangsu Province [TD-XCL-009]
- 333 Project of Jiangsu Province [BRA2017402]
- open research fund of Key Laboratory for Organic Electronics and Information Displays
Ask authors/readers for more resources
A novel fullerene derivative (FBPNOH) grafted with bilateral polar pendants was explored as an efficient electron-collecting layer (ECL) for inverted polymer solar cells (i-PSCs). Using PTB7-Th:PC71BM as the photoactive material, the devices based on FBPNOH achieved power conversion efficiencies (PCEs) exceeding 8.85%, which are higher than those of the reference devices based on sol-gel ZnO. The impact of postsolvent treatment on the interfacial properties and charge transport ability of interlayers and the corresponding optoelectronic characteristics have been systematically investigated in comparison with those of its unilateral counterpart (FPNOH). The results show that the post-solvent annealing process is beneficial for enhancing the carrier transport and extraction characteristics of fullerene-based ECLs for PSCs. Meanwhile, according to ultraviolet photoelectron spectroscopy, dimethyl-formamide solvent annealing can further reduce the work function of indium tin oxide. The electron-selective device tests confirmed the improvement in the charge transport ability for the solvent-annealed films, which boosted PCEs to 9.49% and 10.05% for the typical i-PSCs based on FBPNOH and FPNOH as the ECL, respectively. Our findings shed light on further optimizing the molecular design and device engineering of ECLs for photovoltaic applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available