liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Efficient Nonfullerene Organic Solar Cells with Small Driving Forces for Both Hole and Electron Transfer
Hong Kong Univ Sci and Technol, Peoples R China; Hong Kong Univ Sci and Technol, Peoples R China.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
Xi An Jiao Tong Univ, Peoples R China.
Hong Kong Univ Sci and Technol, Peoples R China.
Show others and affiliations
2018 (English)In: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, Vol. 30, no 45, article id 1804215Article in journal (Refereed) Published
Abstract [en]

State-of-the-art organic solar cells (OSCs) typically suffer from large voltage loss (V-loss) compared to their inorganic and perovskite counterparts. There are some successful attempts to reduce the V-loss by decreasing the energy offsets between the donor and acceptor materials, and the OSC community has demonstrated efficient systems with either small highest occupied molecular orbital (HOMO) offset or negligible lowest unoccupied molecular orbital (LUMO) offset between donors and acceptors. However, efficient OSCs based on a donor/acceptor system with both small HOMO and LUMO offsets have not been demonstrated simultaneously. In this work, an efficient nonfullerene OSC is reported based on a donor polymer named PffBT2T-TT and a small-molecular acceptor (O-IDTBR), which have identical bandgaps and close energy levels. The Fourier-transform photocurrent spectroscopy external quantum efficiency (FTPS-EQE) spectrum of the blend overlaps with those of neat PffBT2T-TT and O-IDTBR, indicating the small driving forces for both hole and electron transfer. Meanwhile, the OSCs exhibit a high electroluminescence quantum efficiency (EQE(EL)) of approximate to 1 x 10(-4), which leads to a significantly minimized nonradiative V-loss of 0.24 V. Despite the small driving forces and a low V-loss, a maximum EQE of 67% and a high power conversion efficiency of 10.4% can still be achieved.

Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH , 2018. Vol. 30, no 45, article id 1804215
Keywords [en]
charge transfer; organic solar cells; small-molecular acceptors; voltage loss
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-153181DOI: 10.1002/adma.201804215ISI: 000449819500004PubMedID: 30276887OAI: oai:DiVA.org:liu-153181DiVA, id: diva2:1267277
Note

Funding Agencies|National Basic Research Program of China (973 Program) [2013CB834701, 2014CB643501]; Shenzhen Technology and Innovation Commission [JCYJ20170413173814007, JCYJ20170818113905024]; Hong Kong Research Grants Council [T23-407/13 N, N_HKUST623/13, 16305915, 16322416, 606012, 16306117, 16303917]; HK JEBN Limited, HKUST presidents office [FP201]; National Science Foundation of China [21374090]; Swedish Energy Agency Energimyndigheten [2016-010174]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009-00971]; Hong Kong Innovation and Technology Commission [ITC-CNERC14SC01, ITS/083/15]

Available from: 2018-11-30 Created: 2018-11-30 Last updated: 2019-03-22

Open Access in DiVA

fulltext(803 kB)0 downloads
File information
File name FULLTEXT01.pdfFile size 803 kBChecksum SHA-512
5ff12de8f318937e4a4f0beaf34f545186fdc6a3d8a5e55d789eb076e0651c13536b7a08eddc43c0d333b2bca04aece6fcd92abf5e3aaa1977112ce6ebee19a4
Type fulltextMimetype application/pdf

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Wang, YumingGao, Feng
By organisation
Biomolecular and Organic ElectronicsFaculty of Science & Engineering
In the same journal
Advanced Materials
Condensed Matter Physics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
pubmed
urn-nbn

Altmetric score

doi
pubmed
urn-nbn
Total: 123 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf