A Three‐dimensional Non‐fullerene Small Molecule Acceptor for Solution‐processed Organic Solar Cells

An acceptor‐donor‐acceptor (A‐D‐A) three‐dimensional (3D) small molecule acceptor (SFTTIC), using spirobifluorene as the core unit linking with four thieno[3,2‐b]thiophenes (TT) and end‐capped with 2‐(3‐oxo‐2,3‐dihydro‐1H‐inden‐1‐ylidene)malononitrile (INCN) was developed for solution processed orga...

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Bibliographic Details
Published in:Chinese journal of chemistry 2017-11, Vol.35 (11), p.1687-1692
Main Authors: Chang, Meijia, Wang, Yunchuang, Qiu, Nailiang, Yi, Yuan‐Qiu‐Qiang, Wan, Xiangjian, Li, Chenxi, Chen, Yongshen
Format: Article
Language:English
Subjects:
Absorptivity
Energy conversion efficiency
Energy levels
Malononitrile
non‐fullerene acceptor
organic solar cells
Photovoltaic cells
Solar cells
solution processed
Thermal stability
Thiophenes
three‐dimensional structure
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Summary:An acceptor‐donor‐acceptor (A‐D‐A) three‐dimensional (3D) small molecule acceptor (SFTTIC), using spirobifluorene as the core unit linking with four thieno[3,2‐b]thiophenes (TT) and end‐capped with 2‐(3‐oxo‐2,3‐dihydro‐1H‐inden‐1‐ylidene)malononitrile (INCN) was developed for solution processed organic solar cells. SFTTIC has a high absorption coefficient up to 3.12 × 105 mol−1•cm−1, good thermal stability and appropriate energy levels. The optimized power conversion efficiency (PCE) of 5.66% and 4.65% was achieved for the devices with PBDB‐T:SFTTIC and PTB7‐Th:SFTTIC, respectively.
ISSN:1001-604X
1614-7065
DOI:10.1002/cjoc.201700399