Journal
NATURE MATERIALS
Volume 17, Issue 8, Pages 703-709Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41563-018-0128-z
Keywords
-
Categories
Funding
- Swedish Energy Agency Energimyndigheten [2016-010174]
- Swedish Research Council VR [621-2013-5561, 2016-06146, 2017-00744]
- Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009-00971]
- National Natural Science Foundation of China [91633301, 51673201, 21325419]
- Chinese Academy of Sciences [XDB12030200]
- China Scholarship Council (CSC) [201306730002]
- Department of the Navy, Office of Naval Research, under the MURI 'Center for Advanced Organic Photovoltaics' [N00014-14-1-0580, N00014-16-1-2520]
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [639750, 717026]
- Swiss National Science Foundation
- Swedish Research Council [2017-00744, 2016-06146] Funding Source: Swedish Research Council
- EPSRC [1829348] Funding Source: UKRI
Ask authors/readers for more resources
The open-circuit voltage of organic solar cells is usually lower than the values achieved in inorganic or perovskite photovoltaic devices with comparable bandgaps. Energy losses during charge separation at the donor-acceptor interface and non-radiative recombination are among the main causes of such voltage losses. Here we combine spectroscopic and quantum-chemistry approaches to identify key rules for minimizing voltage losses: (1) a low energy offset between donor and acceptor molecular states and (2) high photoluminescence yield of the low-gap material in the blend. Following these rules, we present a range of existing and new donor-acceptor systems that combine efficient photocurrent generation with electroluminescence yield up to 0.03%, leading to non-radiative voltage losses as small as 0.21 V. This study provides a rationale to explain and further improve the performance of recently demonstrated high-open-circuit-voltage organic solar cells.
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