Improving Photovoltaic Performance of All-Polymer Solar Cells by Adding an Amorphous BâN Embedded Polymer as the Third Component.
Macromol Rapid Commun
; 44(21): e2300375, 2023 Nov.
Article
em En
| MEDLINE
| ID: mdl-37579197
ABSTRACT
Currently, most of the disclosed ternary strategies to improve photovoltaic performance of all-polymer solar cells (all-PSCs) commonly focus on the guest polymers having similar structures with the host polymer donors or acceptors. Herein, this work develops a distinctive ternary method that adding an amorphous BâN embedded polymer named BN-Cl-2fT to a crystallized host polymer blend of PM6 (a commercialized polymer donor) and PY-TT (a copolymer of Y6 and thieno[3,2-b]thiophene). Although the structures between BN-Cl-2fT and PM6 and PY-TT are completely different, excellent miscibility is found between BN-Cl-2fT and both of the host PM6 and PY-TT, which can be interpreted by the crowded phenyl groups anchoring along the backbone of BN-Cl-2fT, leading to weak self-aggregation. Glazing incidence wide-angle X-ray diffraction (GIWAXS) measurements explicitly confirm the crystallization of PM6 and PY-TT and amorphous feature of BN-Cl-2fT. Furthermore, adding 10 wt% BN-Cl-2fT to PM6PY-TT can significantly enhance the crystallization of the host polymers. Thus the ternary devices based on PM6PY-TTBN-Cl-2fT afford promote short-circuit current density (JSC , 23.29 vs. 21.80 mA cm-2 ), fill factor (FF, 62.4% vs. 60.0%), and power conversion efficiency (PCE, 13.70% vs. 12.23%) in contrast to these parameters of binary devices based on PM6PY-TT. This work provides a unique and enlightening avenue to design high performance all-PSCs by adding amorphous BâN embedded polymers as guest component to enhance host-crystallization.
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01-internacional
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MEDLINE
Assunto principal:
Polímeros
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Tiofenos
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article