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Comparison of the Morphology Development of Polymer-Fullerene and Polymer-Polymer Solar Cells during Solution-Shearing Blade Coating

Gu, X; Yan, H; Kurosawa, T; Schroeder, BC; Gu, KL; Zhou, Y; To, JWF; ... Bao, Z; + view all (2016) Comparison of the Morphology Development of Polymer-Fullerene and Polymer-Polymer Solar Cells during Solution-Shearing Blade Coating. Advanced Energy Materials , 6 (22) , Article 1601225. 10.1002/aenm.201601225. Green open access

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Abstract

In this work, the detailed morphology studies of polymer poly(3‐hexylthiophene‐2,5‐diyl) (P3HT):fullerene(PCBM) and polymer(P3HT):polymer naphthalene diimide thiophene (PNDIT) solar cell are presented to understand the challenge for getting high performance all‐polymer solar cells. The in situ X‐ray scattering and optical interferometry and ex situ hard and soft X‐ray scattering and imaging techniques are used to characterize the bulk heterojunction (BHJ) ink during drying and in dried state. The crystallization of P3HT polymers in P3HT:PCBM bulk heterojunction shows very different behavior compared to that of P3HT:PNDIT BHJ due to different mobilities of P3HT in the donor:acceptor glass. Supplemented by the ex situ grazing incidence X‐ray diffraction and soft X‐ray scattering, PNDIT has a lower tendency to form a mixed phase with P3HT than PCBM, which may be the key to inhibit the donor polymer crystallization process, thus creating preferred small phase separation between the donor and acceptor polymer.

Type: Article
Title: Comparison of the Morphology Development of Polymer-Fullerene and Polymer-Polymer Solar Cells during Solution-Shearing Blade Coating
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/aenm.201601225
Publisher version: http://dx.doi.org/10.1002/aenm.201601225
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Physical Sciences, Technology, Chemistry, Physical, Energy & Fuels, Materials Science, Multidisciplinary, Physics, Applied, Physics, Condensed Matter, Chemistry, Materials Science, Physics, P3HT, PCBM, PNDIT, real time X-ray scattering, solution processing, X-Ray-Scattering, Power Conversion Efficiency, Bulk-Heterojunction Polymer, High-Performance, Glass-Transition, Structural Evolution, Conjugated Polymers, Charge-Transport, Molecular-Weight, Additive-Free
URI: http://discovery.ucl.ac.uk/id/eprint/10048334
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