High Performance All-Polymer Solar Cell via Polymer Side-Chain Engineering

High Performance All-Polymer Solar Cell via Polymer Side-Chain Engineering

An average PCE of 4.2% for all‐polymer solar cells from 20 devices with an average J SC of 8.8 mA cm−2 are obtained with a donor‐acceptor pair despite a low LUMO‐LUMO energy offset of less than 0.1 eV. Incorporation of polystyrene side chains into the donor polymer is found to assist in reducing the...

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Veröffentlicht in:Advanced materials (Weinheim) 2014-06, Vol.26 (22), p.3767-3772
Hauptverfasser: Zhou, Yan, Kurosawa, Tadanori, Ma, Wei, Guo, Yikun, Fang, Lei, Vandewal, Koen, Diao, Ying, Wang, Chenggong, Yan, Qifan, Reinspach, Julia, Mei, Jianguo, Appleton, Anthony Lucas, Koleilat, Ghada I., Gao, Yongli, Mannsfeld, Stefan C. B., Salleo, Alberto, Ade, Harald, Zhao, Dahui, Bao, Zhenan
Format: Artikel
Sprache:eng
Schlagworte:
all-polymer solar cell
Correlation
Devices
low energy loss
Phase separation
Photovoltaic cells
Polystyrene resins
resonant soft X-ray scattering (RSoXS)
Scattering
Short circuit currents
side-chain engineering
Solar cells
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Zusammenfassung:An average PCE of 4.2% for all‐polymer solar cells from 20 devices with an average J SC of 8.8 mA cm−2 are obtained with a donor‐acceptor pair despite a low LUMO‐LUMO energy offset of less than 0.1 eV. Incorporation of polystyrene side chains into the donor polymer is found to assist in reducing the phase separation domain length scale, and results in more than 20% enhancement of PCE. We observe a direct correlation between the short circuit current (J SC) and the length scale of BHJ phase separation, which is obtained by resonance soft X‐ray scattering.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201306242