Recent Development on Narrow Bandgap Conjugated Polymers for Polymer Solar Cells

Gao, Yueyue; Liu, Ming; Zhang, Yong; Liu, Zhitian; Yang, Yang; Zhao, Liancheng

doi:10.3390/polym9020039

Cited by 46 publications

(31 citation statements)

References 152 publications

(246 reference statements)

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“…Organic solar cells (OSCs) have been recognized as a new generation photovoltaic device with appealing properties, such as simple device configuration, low‐cost fabrication process, and great potential in flexible and semitransparent application . The photovoltaic performance of OSCs especially NF‐PSCs has underwent a rapid development along with the emergence of the indacenodithieno[3,2‐b]thiophene (IDTT) style non‐fullerene small molecule acceptor (NF‐SMA) possessing narrow bandgap .…”

Section: Introductionmentioning

confidence: 99%

“…Although the above polymers could generate high efficiencies over 10% in solar cells, their synthetic procedures were extremely complicated. Especially, it usually takes multiple steps to synthesize the acceptor units of these copolymers, i.e., fluorine‐substituted thieno[3,4‐b]thiophene (TT) of PTB7‐Th, 2‐alkyl‐benzo[d]triazoles (TAZ) of FTAZ, and benzo[1,2‐b:4,5‐c′]dithiophene‐4,8‐dione (BDD) of PBDB‐T . This violates the PSCs design philosophy of low cost and is obviously not adaptable for the production of PSCs on a large scale.…”

Section: Introductionmentioning

confidence: 99%

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Efficient Polymer Solar Cells With High Fill Factor Enabled by A Furo[3,4‐c]pyrrole‐4,6‐dione‐Based Copolymer

et al. 2019

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Non‐fullerene polymer solar cells (NF‐PSCs) have achieved tremendous progress in power conversion efficiency (PCE), which is mainly attributed to the well absorption complementation and the admirable energy‐level alignment between donor polymers and fullerene‐free acceptors. However, the development of efficient donor polymers pairing with fullerene‐free acceptors relatively lags behind that of fullerene‐free acceptors in terms of number and diversity for fabricating NF‐PSCs. In this work, a two‐dimensional medium bandgap copolymer (PBDFFPD) based on benzo[1,2‐b:3,4‐b′]difuran (BDF) and furo[3,4‐c]pyrrole‐4,6‐dione (FPD), is firstly designed and synthesized. The as‐prepared polymer possesses a large conjugated plane with negligible torsion, strong intermolecular and intramolecular interaction, and deep highest occupied molecular orbital (HOMO) energy level. The optimized photovoltaic device based on PBDFFPD:ITIC wins a remarkable PCE of 9.58% with a large FF of 70.1%, the highest values ever reported for FPD‐based polymers. In addition, the statistical data from different batches of devices shows that PSCs based on PBDFFPD:ITIC at optimized conditions depict an excellent reproducibility of PCE with a deviation of 2.29%. The results demonstrate that PBDFFPD possesses great potential for constructing highly efficient NF‐PSCs.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficient Polymer Solar Cells With High Fill Factor Enabled by A Furo[3,4‐c]pyrrole‐4,6‐dione‐Based Copolymer

et al. 2019

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“…The thermal annealing treatment is also an efficient way to improve the device performance [12]. To study the effect of thermal treatment on the performance of solar cells, PTBFTPD/PC70BM blend film was heated at different temperature and time before the cathode deposition.…”

Section: Photovoltaic Propertiesmentioning

confidence: 99%

Synthesis and Photovoltaic Properties of a Copolymer based on thieno [2, 3-f] benzofuran and thienopyrroledione

Gao

Yang

Zhang

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Poly(3-hexylthiophene) (P3HT) has been widely used in PSCs because this semiconducting polymer is characterized by a band gap of~1.9 eV, with it being known that the value of this parameter influences the device performance due to the better light harvesting [4]. Although an efficiency of about 5% was achieved using P3HT, the HOMO energy position at −5.0 eV of this polymer [10] is still a major limitation. For this reason, many efforts have been made to obtain narrow band gap polymers by alternating electron-rich units (donor) and electron-deficient units (acceptor) covalently bonded within the same chain, it being known that the weak donors maintain a low HOMO energy level and the strong acceptors reduce the bandgap by promoting intramolecular charge transfer (ICT) from donor to acceptor moieties [4,10,11].…”

Section: Introductionmentioning

confidence: 99%

Organic Thin Films Based on DPP-DTT:C60 Blends Deposited by MAPLE

et al. 2020

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The matrix-assisted pulsed laser evaporation (MAPLE) technique was used for depositing thin films based on a recently developed conjugated polymer, poly[2,5-(2-octyldodecyl)-3,6-diketopyrrolopyrrole-alt-5,5-(2,5-di(thien-2-yl)thieno [3,2-b]thiophene)] (DPP-DTT) and fullerene C60 blends. The targets used in the MAPLE process were obtained by freezing chloroform solutions with different DPP-DTT:C60 weight ratios, with the MAPLE deposition being carried at a low laser fluence, varying the number of laser pulses. The structural, morphological, optical, and electrical properties of the DPP-DTT:C60 blend layers deposited by MAPLE were investigated in order to emphasize the influence of the DPP-DTT:C60 weight ratio and the number of laser pulses on these features. The preservation of the chemical structure of both DPP-DTT and C60 during the MAPLE deposition process is confirmed by the presence of their vibrational fingerprints in the FTIR spectra of the organic thin films. The UV-VIS and photoluminescence spectra of the obtained organic layers reveal the absorption bands attributed to DPP-DTT and the emission bands associated with C60, respectively. The morphology of the DPP-DTT:C60 blend films consists of aggregates and fibril-like structures. Regardless the DPP-DTT:C60 weight ratio and the number of laser pulses used during the MAPLE process, the current–voltage characteristics recorded, under illumination, of all structures developed on the MAPLE deposited layers evidenced a photovoltaic cell behavior. The results proved that the MAPLE emerges as a viable technique for depositing thin films based on conjugated polymers featured by a complex structure that can be further used to develop devices for applications in the solar cell area.

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Recent Development on Narrow Bandgap Conjugated Polymers for Polymer Solar Cells

Cited by 46 publications

References 152 publications

Efficient Polymer Solar Cells With High Fill Factor Enabled by A Furo[3,4‐c]pyrrole‐4,6‐dione‐Based Copolymer

Efficient Polymer Solar Cells With High Fill Factor Enabled by A Furo[3,4‐c]pyrrole‐4,6‐dione‐Based Copolymer

Synthesis and Photovoltaic Properties of a Copolymer based on thieno [2, 3-f] benzofuran and thienopyrroledione

Organic Thin Films Based on DPP-DTT:C60 Blends Deposited by MAPLE

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