An asymmetric small molecule based on thieno[2,3-f]benzofuran for efficient organic solar cells

An asymmetric small molecule based on thieno[2,3-f]benzofuran for efficient organic solar cells A new asymmetric small molecule, named R3T-TBFO, with 4,8-bis(2-ethylhexyloxy)-substituted thieno[2,3-f]benzofuran (TBF) as central donor block, has been synthesized and used as donor material in organic solar cells (OSCs). With thermal annealing (TA) and solvent vapor annealing (SVA) treatment, the blend of R3T-TBFO/PC71BM shows a higher hole mobility of 1.37 × 10−4 cm2 V−1 s−1 and a more balanced charge mobilities. Using a structure of ITO/PEDOT:PSS/R3T-TBFO:PC71BM/ZrAcac/Al, the device with TA treatment delivered a moderate power conversion efficiency (PCE) of 5.63%, while device after TA + SVA treatment showed a preferable PCE of 6.32% with a high fill factor (FF) of 0.72. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Organic Electronics Elsevier

An asymmetric small molecule based on thieno[2,3-f]benzofuran for efficient organic solar cells

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Publisher
Elsevier
Copyright
Copyright © 2016 Elsevier Ltd
ISSN
1566-1199
D.O.I.
10.1016/j.orgel.2016.05.010
Publisher site
See Article on Publisher Site

Abstract

A new asymmetric small molecule, named R3T-TBFO, with 4,8-bis(2-ethylhexyloxy)-substituted thieno[2,3-f]benzofuran (TBF) as central donor block, has been synthesized and used as donor material in organic solar cells (OSCs). With thermal annealing (TA) and solvent vapor annealing (SVA) treatment, the blend of R3T-TBFO/PC71BM shows a higher hole mobility of 1.37 × 10−4 cm2 V−1 s−1 and a more balanced charge mobilities. Using a structure of ITO/PEDOT:PSS/R3T-TBFO:PC71BM/ZrAcac/Al, the device with TA treatment delivered a moderate power conversion efficiency (PCE) of 5.63%, while device after TA + SVA treatment showed a preferable PCE of 6.32% with a high fill factor (FF) of 0.72.

Journal

Organic ElectronicsElsevier

Published: Aug 1, 2016

References

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