Donor–acceptor polymers based on multi-fused heptacyclic structures: synthesis, characterization and photovoltaic applications

Wu, Jhong-Sian; Cheng, Yen‐Ju; Dubosc, M.; Hsieh, Chao-Hsiang; Chang, Chin‐Yen; Hsu, Chain‐Shu

doi:10.1039/c003040f

Cited by 118 publications

(78 citation statements)

References 30 publications

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“…The device using P80:PC 71 Alternating copolymers poly(2,7-fluorene-alt-dithienylbenzothiadiazole) (PFD TBT) [119] and poly(2,7-carbazole-alt-dithienylbenzothiadiazole) (PCDTBT) [120] have been a promising class of p-type photoactive materials for the application in PSCs. Cheng et al [121] reported two D-A copolymers poly(fluorene-dicyclopentathiophenealt-benzothiadiazole) P81 and poly(carbazole-dicyclopentathiophene-alt-benzothiadiazole) P82. Both polymers were designed based on the skeletons of the well-known PFDTBT and PCDTBT polymers.…”

Section: Conjugated Polymers Containing Multifused Alternatementioning

confidence: 99%

Recent Advances in P-Type Conjugated Polymers for High-Performance Solar Cells

Cheng

Wang

et al. 2015

Topics in Applied Physics

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Bulk-heterojunction (BHJ) polymer solar cells have achieved significant progress in the recent years, with the efficiency now over 10 %. The p-type polymer in the BHJ blend played a key role in the amazing technology advance. In this chapter, we will timely update over 80 conjugated polymers leading to highperformance solar cells. The principle of molecular design with structure-properties relationship with respect to device characteristics will also be discussed, as the materials and morphology are tightly interconnected.

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Section: Conjugated Polymers Containing Multifused Alternatementioning

confidence: 99%

Recent Advances in P-Type Conjugated Polymers for High-Performance Solar Cells

Cheng

Wang

et al. 2015

Topics in Applied Physics

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“…Taking this into account, Hsu et al reported two new ladder-typed polymers P9 and P10, which were prepared by copolymerization of the heptacyclic donor (fluorenedicyclopentathiophene or carbazole-dicyclopentathiophene) with the BT acceptor. Through such a simple and straightforward engineering of molecular side chains, the large π-conjugated coplanar P9 and P10 simultaneously possess excellent solubility for solution processability, low band gaps with suitable position of HOMO/ LUMO energy levels, and high hole mobilities, leading to promising PCEs of 3.7 [19] In 2011, Hsu's group reported a nonacylic thienyl-phenylene-thienylenephenylene-thienyl (TPTPT) donor unit that consists of alternate thiophene and benzene units fused by four embedded cyclopentadienyl rings. Copolymer P12 with TPTPT as the donor unit and BT as the acceptor unit was synthesized by Stille cross-coupling reaction and used as donor material for the fabrication of PSCs.…”

Section: Bt-based Donor Polymers For Photovoltaic Applicationmentioning

confidence: 99%

Donor Materials for Organic Solar Cell (OSC)

Song

2014

Organic and Hybrid Solar Cells

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In the past 10 years, the highest efficiency obtained from organic photovoltaics (OPVs), such as bulk heterojunction (BHJ) polymer solar cells (PSCs), has risen from 2.5 to 11 %, while the solution-processed small molecule (SM) BHJ solar cells arrived at competitive level of 10 %. This rapid progress was achieved by the development of both materials synthesis and device fabrication. With the better understanding of the mechanism of the photon-to-electron conversion process in OPV, the commercialization of PSCs could be realized soon. Nowadays, a lot of efforts have been devoted to developing of new donor, acceptor, and interfacial layer materials, optimizing nanostructures of the active layer, fabricating new device architectures, and so on.The development of new donor materials for PSCs is one of the most popular research topics in the field of PSCs and many excellent results have been published. A variety of polymers and SMs have been reported as donor materials for OPVs and some of them might be candidates for the commercialization later. From the reported structures, the conjugated backbones of polymers for OPV can be arbitrarily classified into a few categories based on the constitution of the repeating unit, namely, (a) homopolymers, (b) donor-acceptor polymers, (c) quinoid polymers, and (d) other types of polymers; whereas the SM donors can be classified into the following categories based on their main structures, (a) donor-acceptor type molecules, (b) squaraine dyes, and (c) oligomer and dendrimers.

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“…Cheng et al . reported another larger coplanar carbazole -related unit which contained seven fused rings and could be copolymerized with benzothiadiazole to yield d5 , which gave a PCE of 3.7% when blended with PC 71 BM [47] .…”

Section: Polycarbazole Derivativesmentioning

confidence: 99%

Polymer Solar Cells

Bai

Shi

Zhan

2013

Organic Optoelectronics

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IntroductionThe photoactive layer of polymer solar cell s ( PSC s) is constituted of continuous and interpenetrating polymer donor and small -molecule or polymer acceptors. This structure is able to maximally increase the area of interface between the donor and acceptor, and thus improve the charge separation effi ciency. Conjugated polymers can be classifi ed as either electron donors ( p -type) or electron acceptors ( ntype), according to their differences in transporting holes or electrons in the cell. Among the semiconducting polymer materials, the p -type materials have attracted more attention, and are generally mixed with [6,6] -phenyl -C 61 or C 71 -butyric acid methyl ester ( PC 61 BM or PC 71 BM) to construct the photoactive layer of bulk heterojunction ( BHJ ) solar cells. Currently, the highest reported power conversion effi ciency ( PCE ) of polymer solar cells is 8.37% [1] . The n -type materials develop relatively slowly, and are frequently mixed with classic donor materials such as polyphenylenevinylene ( PPV ) derivatives, poly(3 -hexylthiophene) ( P3HT ), or other p -type materials, to construct all -polymer solar cells. To date, the highest PCE of these material is less than 3%.The basic requirements for an ideal donor or acceptor polymer material include: (i) good solubility and fi lm -forming properties; (ii) strong and broad bandwidth absorption; (iii) high hole or electron mobilities; (iv) suitable HOMO/LUMO energy levels; and (v) a high purity and molecular weight [2] . The aim of this chapter is to discuss the research and development of polymer solar cells fabricated from conjugated polymer donors and fullerene acceptors or conjugated polymer acceptors.

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Donor–acceptor polymers based on multi-fused heptacyclic structures: synthesis, characterization and photovoltaic applications

Cited by 118 publications

References 30 publications

Recent Advances in P-Type Conjugated Polymers for High-Performance Solar Cells

Recent Advances in P-Type Conjugated Polymers for High-Performance Solar Cells

Donor Materials for Organic Solar Cell (OSC)

Polymer Solar Cells

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