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Abstract
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Core–mantle–shell supramolecules composed of carbon nanotube (CNT)-graftpolyaniline (PANI), poly(3-hexylthiophene) (P3HT), and poly[benzodithiophene-bis(decyltetradecyl-thien) naphthothiadiazole] (PBDT-DTNT) precursors were designed and utilized in PBDT-DTNT:phenyl-C61-butyric acid
methyl ester (PC61BM) solar cells. Weight ratio of polymer:CNT-graft-PANI
was 9:1 and the weight ratios were 1:1 in binary and 1:1:1 in ternary systems.
Diameters of core(CNT)–mantle(PANI), core(CNT)–mantle(PANI)–
shell(P3HT), and core(CNT)–mantle(PANI)–shell(PBDT-DTNT) nanostructures ranged in 75–90 nm, 145–160 nm, and 120–130 nm, respectively. Efficacies of 6.82% (13.92 mA/cm2, 0.71 V, 69%, 7.1 9 103 cm2/V s and
1.9 9 102 cm2/V s) and 7.60% (14.66 mA/cm2, 0.73 V, 71%, 9.0 9 103 cm2/
V s and 3.4 9 102 cm2/V s) were acquired for photovoltaics based on the
nanostructures having PBDT-DTNT and P3HT shells, respectively. The PANI
mantle may act as both acceptor (accepting the electrons from core) and donor
(donating the electrons to shell) in the configuration of core–mantle–shell
supramolecules. The P3HT shells acted better than the PBDT-DTNT ones,
originated from the simple structure of P3HT backbones and their more ordered and thicker shells, and thus had larger charge mobilities and currents.
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