Disodium Edetate As a Promising Interfacial Material for Inverted Organic Solar Cells and the Device Performance Optimization
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
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.
Small molecule electrolytes; interlayer; organic solar cells; external bias
IdentifiersURN: urn:nbn:se:liu:diva-113572DOI: 10.1021/am5044278ISI: 000346326600001PubMedID: 25402413OAI: oai:DiVA.org:liu-113572DiVA: diva2:783088
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 Commission2015-01-232015-01-232015-03-06