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Settled/unsettled blend nanofibers electrospun from photoactive polymeric/nonpolymeric constituents in PBDT‐DTNT:PCBM solar cells
Author(s) -
Agbolaghi Samira
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.47591
Subject(s) - materials science , nanofiber , electrospinning , acceptor , chemical engineering , polymer chemistry , composite material , polymer , physics , engineering , condensed matter physics
ABSTRACT To increase internal donor–acceptor interfaces and highlight the influence of ordering of donor–acceptor components inside fibers, novel blend fibrous structures comprising unsettled poly[benzodithiophene‐bis(decyltetradecyl‐thien) naphthothiadiazole] (PBDT‐DTNT):grafted‐reduced graphene oxide (rGO) nanofibers, settled PBDT‐DTNT/grafted‐rGO nanofibers including PBDT‐DTNT, and settled PBDT‐DTNT/grafted‐rGO nanofibers excluding PBDT‐DTNT were prepared and embedded in photovoltaics. Hence, three‐dimensional nonwoven network morphologies of triple electrospun fibers were acquired using electrospinning. Average diameter and conductivity of PBDT‐DTNT:grafted‐rGO, PBDT‐DTNT/grafted‐rGO:PBDT‐DTNT, and PBDT‐DTNT/grafted‐rGO fibers ranged in 200–250 and 1.1–1.6 × 10 −9 S cm −1 , 150–190 and 9.2–9.5 × 10 −7 S cm −1 , and 60–80 nm and 3.3–3.7 × 10 −10 S cm −1 , respectively. Photoluminescence quenching and thus donating–accepting characteristic of settled PBDT‐DTNT/grafted‐rGO nanofibers including PBDT‐DTNT were more intensified, resulting from greater internal interfaces. Through blending PBDT‐DTNT/grafted‐rGO supramolecules with PBDT‐DTNT chains and embedding them in PBDT‐DTNT:phenyl‐C71‐butyric acid methyl ester (PC71BM) thin films, the best results were obtained. Short‐circuit current density (J sc ), open circuit voltage (V oc ), fill factor (FF), and power conversion efficiency (PCE) were 12.18 mA cm −2 , 0.66 V, 65%, and 5.22%, respectively. Nanofiber template not only acted as guide path for charge transport but also increased interfacial area between donor and acceptor to induce more exciton dissociation. Inclusion of PBDT‐DTNT donor chains into blend nanofibers increased donor–acceptor interface in organic filaments. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47591.