Poly(benzo[2,1-b:3,4-b′]dithiophene-alt-isoindigo): a low bandgap polymer showing a high open circuit voltage in polymer solar cells

A novel optical band gap of 1.57 eV isoindigo (IID)-containing polymer of PBDP-IID was synthesized and the HOMO of the polymer descends to −5.44 eV due to strong electron-deficient isoindigo unit. Bulk heterojunction solar cells made from PBDP-IID exhibited a high V oc of 0.95 V, which shows the hig...

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Bibliographic Details
Published in:RSC advances 2015-01, Vol.5 (1), p.269-273
Main Authors: Wan, Meixiu, Zhu, Hongbing, Liu, Juan, Huo, Lijun
Format: Article
Language:English
Subjects:
Energy gaps (solid state)
Heterojunctions
Open circuit voltage
Photovoltaic cells
Solar cells
Synthesis (chemistry)
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Summary:A novel optical band gap of 1.57 eV isoindigo (IID)-containing polymer of PBDP-IID was synthesized and the HOMO of the polymer descends to −5.44 eV due to strong electron-deficient isoindigo unit. Bulk heterojunction solar cells made from PBDP-IID exhibited a high V oc of 0.95 V, which shows the highest value among the PSCs based on the narrow bandgap polymer donors with E g < 1.6 eV.
ISSN:2046-2069
2046-2069
DOI:10.1039/C4RA12171F