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Disodium Edetate As a Promising Interfacial Material for Inverted Organic Solar Cells and the Device Performance Optimization
Chinese Academic Science, Peoples R China; University of Chinese Academic Science, Peoples R China.
Chinese Academic Science, Peoples R China.
Chinese Academic Science, Peoples R China; University of Chinese Academic Science, Peoples R China.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-2582-1740
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2014 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 6, no 23, 20569-20573 p.Article in journal (Refereed) Published
Abstract [en]

Disodium edetate (EDTA-Na), a popular hexadentate ligand in analytical chemistry, was successfully introduced in organic solar cells (OSCs) as cathode interfacial layer. The inverted OSCs with EDTA-Na showed superior performance both in power conversion efficiency and devices stability compared with conventional devices. Interestingly, we found that the performance of devices with EDTA-Na could be optimized through external bias treatment. After optimization, the efficiency of inverted OSCs with device structure of ITO/EDTA-Na/polymer thieno[3,4-b]thiophene/benzodithiophene (PTB7):PC71BM/MoO3/Al was significantly increased to 8.33% from an initial value of 6.75%. This work introduces a new class of interlayer materials, small molecule electrolytes, for organic solar cells.

Place, publisher, year, edition, pages
American Chemical Society , 2014. Vol. 6, no 23, 20569-20573 p.
Keyword [en]
Small molecule electrolytes; interlayer; organic solar cells; external bias
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:liu:diva-113572DOI: 10.1021/am5044278ISI: 000346326600001PubMedID: 25402413OAI: oai:DiVA.org:liu-113572DiVA: diva2:783088
Note

Funding Agencies|National Natural Science Foundation of China [61474125, 51273208]; Zhejiang Provincial Natural Science Foundation of China [LR14E030002]; Hundred Talent Program of Chinese Academy of Sciences; Ningbo Natural Science Foundation of China [2012A610114, 2013A610132]; European Commission

Available from: 2015-01-23 Created: 2015-01-23 Last updated: 2017-12-05

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Gao, Feng

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