Synthesis of Alternating Low‐Bandgap Conjugated Polymers Based on Dithieno[2,3‐d:2′,3′‐d′]naphtho[1,2‐b:3,4‐b′]dithiophene and Enhancement of Photovoltaic Properties with Solvent Additives

Xia, Yangjun; Wang, Jianlong; Li, Jianfeng; Guo, Pengzhi; Zhang, Peng; Yang, Chunyan; Fan, Dongrui

doi:10.1002/macp.201400536

Cited by 3 publications

(1 citation statement)

References 40 publications

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“…As shown in Figure S7a–e (Supporting Information), the RMS roughness of five films increases gradually, being 1.37, 2.06, 3.12, 4.51, and 6.90 nm, as the amount of DIO additive increases. The film in device 1 without any additive presents featureless surface with poorly defined domains, which is usually not ideal for charge transport . In film 5 with 7% DIO, very large aggregates were observed, suggesting severe phase separation and inadequate exciton separation .…”

Section: Resultsmentioning

confidence: 99%

High‐Detectivity All‐Polymer Photodetectors with Spectral Response from 300 to 1100 nm

Qiao

Zhou

et al. 2016

Macro Chemistry & Physics

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Broad‐response and high‐detectivity for all‐polymer photodetectors based on p‐ and n‐type semiconducting polymers have been achieved through optimization of polymer property and film microstructure. The electron‐donating units in the p‐type polymers affect a great deal of the polymer properties such as solubility, absorption spectra, and electronic energy levels, which in turn can influence the device performance. The polymer (P3) based on dithienopyrrole and diketopyrrolopyrrole is most promising for photodetector applications, as it possesses the suitable energy level with regard to the n‐type polymer and exhibits appropriate film morphology and molecular stacking with aid of 1,8‐diiodooctane as an additive during film processing. The photodetector based on P3/poly{[N,N′‐bis(2‐octyldodecyl)‐naphthalene‐1,4,5,8‐bis(dicarboximide)‐2,6‐diyl]‐alt‐5,5′‐(2,2′‐bithiophene)} (PNDI) exhibits good response from 300 to 1100 nm and nearly constant detectivity (D*) above 1012 Jones at 330–980 nm, rendering a great potential of all‐polymer photodetectors for practical applications.

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Section: Resultsmentioning

confidence: 99%

High‐Detectivity All‐Polymer Photodetectors with Spectral Response from 300 to 1100 nm

Qiao

Zhou

et al. 2016

Macro Chemistry & Physics

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Tuning the electronic and optical properties of NDT-based conjugated polymers by adopting fused heterocycles as acceptor units: a theoretical study

Cheng

Zhang

2017

J Mol Model

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Donor-acceptor conjugated polymers have been successfully applied in bulk heterojunction solar cell devices. Tuning their donor and acceptor units allows the design of new polymers with desired electronic and optical properties. Here, to screen new candidate polymers based on a newly synthesized donor unit, dithieo[2,3-d:2',3'-d']naphtho[1,2-b:3,4-b']dithiophene (NDT), a series of model polymers with different acceptor units were designed and denoted NDT-A to NDT-A, and the structures and optical properties of those polymers were investigated using DFT and TDDFT calculations. The results of the calculations revealed that the electronic and optical properties of these polymers depend on the acceptor unit present; specifically, their HOMO energies ranged from -4.89 to -5.38 eV, their HOMO-LUMO gaps ranged from 1.30 to 2.80 eV, and their wavelengths of maximum absorption ranged from 538 to 1212 nm. The absorption spectra of NDT-A to NDT-A, NDT-A, NDT-A, and NDT-A occur within the visible region (<900 nm), indicating that these polymers are potential candidates for use in solar cells. On the other hand, the absorption spectra of NDT-A, NDT-A, and NDT-A extend much further into the near-infrared region, implying that they absorb near-infrared light. These polymers could meet the requirements of donor units for use in tandem and ternary solar cells. Graphical abstract Theoretical calculations by TD-DFT reveal that the optical properties of NDT-based conjugated polymers can be well tuned by adopting different acceptor units, and these ploymers are potential donor materials for tandem and ternary solar cells.

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Synthesis and properties of isoindigo and benzo[1,2-b:4,5-b′]bis[b]benzothiophene oligomers

et al. 2018

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Synthesis of Alternating Low‐Bandgap Conjugated Polymers Based on Dithieno[2,3‐d:2′,3′‐d′]naphtho[1,2‐b:3,4‐b′]dithiophene and Enhancement of Photovoltaic Properties with Solvent Additives

Cited by 3 publications

References 40 publications

High‐Detectivity All‐Polymer Photodetectors with Spectral Response from 300 to 1100 nm

High‐Detectivity All‐Polymer Photodetectors with Spectral Response from 300 to 1100 nm

Tuning the electronic and optical properties of NDT-based conjugated polymers by adopting fused heterocycles as acceptor units: a theoretical study

Synthesis and properties of isoindigo and benzo[1,2-b:4,5-b′]bis[b]benzothiophene oligomers

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