Journal ArticleDOI
An Effective Strategy to Design a Large Bandgap Conjugated Polymer by Tuning the Molecular Backbone Curvature.
Jiuxing Wang,Congcong Zhao,Congcong Zhao,Long Zhou,Xin Liang,Yonghai Li,Guanyu Sheng,Zhonglin Du,Jianguo Tang +8 more
TLDR
In this article, the authors proposed a new strategy to enlarge the bandgap of a polymer with simultaneously decreased HOMO and increased LUMO by increasing the polymer backbone curvature.Abstract:
With the significant progress of low bandgap non-fullerene acceptors, the development of wide bandgap (WBG) donors possessing ideal complementary absorption is of crucial importance to further enhance the photovoltaic performance of organic solar cells. An ideal strategy to design WBG donors is to down-shift the highest occupied molecular orbital (HOMO) and up-shift the lowest unoccupied molecular orbital (LUMO). A properly low-lying HOMO of the donor is favorable to obtaining a high open-circuit voltage, and a properly high-lying LUMO of the donor is conductive to efficient exciton dissociation. This work provides a new strategy to enlarge the bandgap of a polymer with simultaneously decreased HOMO and increased LUMO by increasing the polymer backbone curvature. The polymer PIDT-fDTBT with a large molecular backbone curvature shows a decreased HOMO of -5.38 eV and a prominently increased LUMO of -3.35 eV relative to the linear polymer PIDT-DTBT (EHOMO = -5.30 eV, ELUMO = -3.55 eV). The optical bandgap of PIDT-fDTBT is obviously broadened from 1.75 to 2.03 eV. This work demonstrates that increasing the polymer backbone curvature can effectively broaden the bandgap by simultaneously decreasing HOMO and increasing LUMO, which may guide the design of WBG conjugated materials.read more
Citations
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Journal ArticleDOI
Synthesis, modification and application of titanium dioxide nanoparticles: a review.
Jin-quan Wang,Zhiheng Wang,Yao Wang,Xiaoli Hu,Jixian Liu,Xue Yong Gong,Wenli Miao,Li Ding,Xinbo Li,Jianguo Tang +9 more
TL;DR: In this article , a review mainly discusses the aspects of TiO2-modified nanoparticles including synthetic methods, modifications and applications, as well as the applications of these nanoparticles.
Journal ArticleDOI
Synchronously regulating the alkyl side-chain and regioisomer of polymerized small molecule acceptor enabling highly efficient all-polymer solar cells processed with non-halogenated solvent
TL;DR: In this paper , a non-halogenated solvent processable PSMAs are designed by integrating both side-chain and backbone regioisomer engineering, where the long-branched alkyl side chain is selected to enhance the solute-solvent interaction and enable the resulting polymers to be readily dissolved and processable in a nonhalogenation solvent 2-methyl-tetrafuran (2-MeTHF).
Journal ArticleDOI
Synchronously regulating the alkyl side-chain and regioisomer of polymerized small molecule acceptor enabling highly efficient all-polymer solar cells processed with non-halogenated solvent
Jens Schlieter,Tao Jia,Jiabin Zhang,Maayan Zhitomirsky-Geffet,Haoran Tang,Jianchao Jia,Kai Zhang,Wanyuan Deng,Sheng Dong,Fei Huang +9 more
TL;DR: In this article, a non-halogenated solvent processable PSMAs are designed by integrating both side-chain and backbone regioisomer engineering, where the long-branched alkyl side chain is selected to enhance the solute-solvent interaction and enable the resulting polymers to be readily dissolved and processable in a 2-methyl-tetrafuran (2-MeTHF) solvent.
Journal ArticleDOI
The evolution of small molecular acceptors for organic solar cells: Advances, challenges and prospects
Xin Liang,Jin Q. Cheng,Xin Liang,Jiuxing Wang,Run Miao,Qing Zhao,Linjun Huang,Shuguang Wen,Jianguo Tang +8 more
TL;DR: In this paper, the relationship among molecular structures, optical properties, energy levels, device processing methods, and photovoltaic performance are systematically analyzed and summarized for non-fullerene small molecular acceptors (NFSMAs).
Journal ArticleDOI
The evolution of small molecular acceptors for organic solar cells: Advances, challenges and prospects
TL;DR: In this article , the relationship among molecular structures, optical properties, energy levels, device processing methods, and photovoltaic performance are systematically analyzed and summarized for non-fullerene small molecular acceptors (NFSMAs).
References
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Journal ArticleDOI
Multiwfn: a multifunctional wavefunction analyzer.
Tian Lu,Feiwu Chen +1 more
TL;DR: Five practical examples involving a wide variety of systems and analysis methods are given to illustrate the usefulness of Multiwfn, a multifunctional program for wavefunction analysis.
Journal ArticleDOI
Single-Junction Organic Solar Cell with over 15% Efficiency Using Fused-Ring Acceptor with Electron-Deficient Core
Jun Yuan,Yunqiang Zhang,Liuyang Zhou,Liuyang Zhou,Guichuan Zhang,Hin-Lap Yip,Tsz-Ki Lau,Xinhui Lu,Can Zhu,Can Zhu,Hongjian Peng,Paul A. Johnson,Mario Leclerc,Yong Cao,Jacek Ulanski,Yongfang Li,Yingping Zou +16 more
TL;DR: In this paper, a ladder-type electron-deficient core-based central fused ring (Dithienothiophen[3.2-b]- pyrrolobenzothiadiazole) with a benzothiadiadiazoles (BT) core was proposed to fine-tune its absorption and electron affinity.
Journal ArticleDOI
An electron acceptor challenging fullerenes for efficient polymer solar cells.
TL;DR: A novel non-fullerene electron acceptor (ITIC) that overcomes some of the shortcomings of fullerene acceptors, for example, weak absorption in the visible spectral region and limited energy-level variability, is designed and synthesized.
Journal ArticleDOI
Organic and solution-processed tandem solar cells with 17.3% efficiency
Lingxian Meng,Yamin Zhang,Xiangjian Wan,Chenxi Li,Xin Zhang,Yanbo Wang,Xin Ke,Zuo Xiao,Liming Ding,Ruoxi Xia,Hin-Lap Yip,Yong Cao,Yongsheng Chen +12 more
TL;DR: In this article, a semi-empirical model analysis and using the tandem cell strategy to overcome the low charge mobility of organic materials, leading to a limit on the active-layer thickness and efficient light absorption was performed.
Journal ArticleDOI
Non-fullerene acceptors for organic solar cells
TL;DR: Non-fullerene acceptors (NFAs) are currently a major focus of research in the development of bulk-heterojunction organic solar cells (OSCs) as mentioned in this paper.