Journal
NANO LETTERS
Volume 21, Issue 5, Pages 2207-2215Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c05045
Keywords
organic photovoltaics; layered third component; layered third-component layer structures; bulk heterojunction ternary blend
Categories
Funding
- Center for Emergent Functional Matter Science of National Yang Ming Chiao Tung University/National Chiao Tung University from the Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Educatio
- Ministry of Science and Technology, Taiwan [MOST 109-2221-E-009-064-MY3, MOST 107-2923-M-009-004-MY3]
- Ministry of Education Subsidies for Universities and Tertiary Colleges to Develop International Bilateral Program to Jointly Train World Class Professionals, Taiwan
- Air Force Office of Scientific Research (AFOSR) [FA2386-18-1-4094]
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This study demonstrates a universal approach for constructing a new bilayer device architecture in OPV systems, utilizing a few-nanometer-thick third-component layer on a bulk-heterojunction binary blend layer. The enhancement in power conversion efficiency achieved through the layered third-component structure shows great promise for achieving high-performance OPVs.
In this paper, a universal approach toward constructing a new bilayer device architecture, a few-nanometer-thick third-component layer on a bulk-heterojunction (BHJ) binary blend layer, has been demonstrated in two different state-of-the-art organic photovoltaic (OPV) systems. Through a careful selection of a third component, the power conversion efficiency (PCE) of the device based on PM6/Y6/layered PTQ10 layered third-component structure was 16.8%, being higher than those of corresponding devices incorporating the PM6/Y6/PTQ10 BHJ ternary blend (16.1%) and the PM6/Y6 BHJ binary blend (15.5%). Also, the device featuring PM7/Y1-4F/layered PTQ10 layered third-component structure gave a PCE of 15.2%, which is higher than the PCEs of the devices incorporating the PM7/Y1-4F/PTQ10 BHJ ternary blend and the PM7/Y1-4F BHJ binary blend (14.2 and 14.0%, respectively). These enhancements in PCE based on layered third-component structure can be attributed to improvements in the charge separation and charge collection abilities. This simple concept of the layered third-component structure appears to have great promise for achieving high-performance OPVs.
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