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Kuznetsov IE, Nikitenko SL, Kuznetsov PM, Dremova NN, Troshin PA, Akkuratov AV. Solubilizing Side Chain Engineering: Efficient Strategy to Improve the Photovoltaic Performance of Novel Benzodithiophene‐Based (X‐DADAD)
n
Conjugated Polymers. Macromol Rapid Commun 2020; 41:e2000430. [DOI: 10.1002/marc.202000430] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 09/06/2020] [Indexed: 11/10/2022]
Affiliation(s)
- Ilya E. Kuznetsov
- Institute for Problems of Chemical Physics of the Russian Academy of Sciences (IPCP RAS) Academician Semenov avenue 1, Chernogolovka Moscow 142432 Russia
| | - Sergey L. Nikitenko
- Institute for Problems of Chemical Physics of the Russian Academy of Sciences (IPCP RAS) Academician Semenov avenue 1, Chernogolovka Moscow 142432 Russia
| | - Petr M. Kuznetsov
- Institute for Problems of Chemical Physics of the Russian Academy of Sciences (IPCP RAS) Academician Semenov avenue 1, Chernogolovka Moscow 142432 Russia
| | - Nadezhda N. Dremova
- Institute for Problems of Chemical Physics of the Russian Academy of Sciences (IPCP RAS) Academician Semenov avenue 1, Chernogolovka Moscow 142432 Russia
| | - Pavel A. Troshin
- Institute for Problems of Chemical Physics of the Russian Academy of Sciences (IPCP RAS) Academician Semenov avenue 1, Chernogolovka Moscow 142432 Russia
- Skolkovo Institute of Science and Technology Nobel st. 3 Moscow 143025 Russia
| | - Alexander V. Akkuratov
- Institute for Problems of Chemical Physics of the Russian Academy of Sciences (IPCP RAS) Academician Semenov avenue 1, Chernogolovka Moscow 142432 Russia
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An L, Huang Y, Wang X, Liang Z, Li J, Tong J. Fluorination Effect for Highly Conjugated Alternating Copolymers Involving Thienylenevinylene-Thiophene-Flanked Benzodithiophene and Benzothiadiazole Subunits in Photovoltaic Application. Polymers (Basel) 2020; 12:E504. [PMID: 32106540 PMCID: PMC7254375 DOI: 10.3390/polym12030504] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 02/21/2020] [Accepted: 02/22/2020] [Indexed: 01/28/2023] Open
Abstract
Two two-dimensional (2D) donor-acceptor (D-A) type conjugated polymers (CPs), namely, PBDT-TVT-BT and PBDT-TVT-FBT, in which two ((E)-(4,5-didecylthien-2-yl)vinyl)- 5-thien-2-yl (TVT) side chains were introduced into 4,8-position of benzo[1,2-b:4,5-b']dithiophene (BDT) to synthesize the highly conjugated electron-donating building block BDT-TVT, and benzothiadiazole (BT) and/or 5,6-difluoro-BT as electron-accepting unit, were designed to systematically ascertain the impact of fluorination on thermal stability, optoelectronic property, and photovoltaic performance. Both resultant copolymers exhibited the lower bandgap (1.60 ~ 1.69 eV) and deeper highest occupied molecular orbital energy level (EHOMO, -5.17 ~ -5.37 eV). It was found that the narrowed absorption, deepened EHOMO and weakened aggregation in solid film but had insignificant influence on thermal stability after fluorination in PBDT-TVT-FBT. Accordingly, a PBDT-TVT-FBT-based device yielded 16% increased power conversion efficiency (PCE) from 4.50% to 5.22%, benefited from synergistically elevated VOC, JSC, and FF, which was mainly originated from deepened EHOMO, increased μh, μe, and more balanced μh/μe ratio, higher exciton dissociation probability and improved microstructural morphology of the photoactive layer as a result of incorporating fluorine into the polymer backbone.
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Affiliation(s)
- Lili An
- Key Laboratory for Utility of Environment- Friendly Composite Materials and Biomass in University of Gansu Province, School of Chemical Engineering, Northwest Minzu University, Lanzhou 730030, China
| | - Yubo Huang
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; (Y.H.); (X.W.); (Z.L.); (J.L.); (J.T.)
| | - Xu Wang
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; (Y.H.); (X.W.); (Z.L.); (J.L.); (J.T.)
| | - Zezhou Liang
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; (Y.H.); (X.W.); (Z.L.); (J.L.); (J.T.)
- CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Jianfeng Li
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; (Y.H.); (X.W.); (Z.L.); (J.L.); (J.T.)
| | - Junfeng Tong
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; (Y.H.); (X.W.); (Z.L.); (J.L.); (J.T.)
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Elevated Photovoltaic Performance in Medium Bandgap Copolymers Composed of Indacenodi-thieno[3,2- b]thiophene and Benzothiadiazole Subunits by Modulating the π-Bridge. Polymers (Basel) 2020; 12:polym12020368. [PMID: 32046028 PMCID: PMC7077401 DOI: 10.3390/polym12020368] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Revised: 01/10/2020] [Accepted: 01/13/2020] [Indexed: 11/28/2022] Open
Abstract
Two random conjugated polymers (CPs), namely, PIDTT-TBT and PIDTT-TFBT, in which indacenodithieno[3,2-b]thiophene (IDTT), 3-octylthiophene, and benzothiadiazole (BT) were in turn utilized as electron-donor (D), π-bridge, and electron-acceptor (A) units, were synthesized to comprehensively analyze the impact of reducing thiophene π-bridge and further fluorination on photostability and photovoltaic performance. Meanwhile, the control polymer PIDTT-DTBT with alternating structure was also prepared for comparison. The broadened and enhanced absorption, down-shifted highest occupied molecular orbital energy level (EHOMO), more planar molecular geometry thus enhanced the aggregation in the film state, but insignificant impact on aggregation in solution and photostability were found after both reducing thiophene π-bridge in PIDTT-TBT and further fluorination in PIDTT-TFBT. Consequently, PIDTT-TBT-based device showed 185% increased PCE of 5.84% profited by synergistically elevated VOC, JSC, and FF than those of its counterpart PIDTT-DTBT, and this improvement was chiefly ascribed to the improved absorption, deepened EHOMO, raised μh and more balanced μh/μe, and optimized morphology of photoactive layer. However, the dropped PCE was observed after further fluorination in PIDTT-TFBT, which was mainly restricted by undesired morphology for photoactive layer as a result of strong aggregation even if in the condition of the upshifted VOC. Our preliminary results can demonstrate that modulating the π-bridge in polymer backbone was an effective method with the aim to enhance the performance for solar cell.
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An L, Tong J, Yang C, Zhao X, Wang X, Xia Y. Impact of alkyl side chain on the photostability and optoelectronic properties of indacenodithieno[3,2‐
b
]thiophene‐
alt
‐naphtho[1,2‐
c
:5,6‐
c
′]bis[1,2,5]thiadiazole medium bandgap copolymers. POLYM INT 2019. [DOI: 10.1002/pi.5936] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Lili An
- School of Chemical Engineering, Northwest Minzu UniversityKey Laboratory for Utility of Environment‐Friendly Composite Materials and Biomass in University of Gansu Province Lanzhou P. R. China
| | - Junfeng Tong
- School of Materials Science and EngineeringLanzhou Jiaotong University Lanzhou P. R. China
| | - Chunyan Yang
- School of Materials Science and EngineeringLanzhou Jiaotong University Lanzhou P. R. China
| | - Xu Zhao
- Institute of Soil, Fertilizer and Water‐saving AgricultureGansu Academy of Agricultural Sciences Lanzhou P. R. China
| | - Xunchang Wang
- CAS Key Laboratory of Bio‐based Materials, Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of Sciences Qingdao P. R. China
| | - Yangjun Xia
- School of Materials Science and EngineeringLanzhou Jiaotong University Lanzhou P. R. China
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Agbolaghi S. Pure and complex nanostructures using poly[bis(triiso‐propylsilylethynyl) benzodithiophene‐bis(decyltetradecyl‐thien) naphthobisthiadiazole], carbon nanotubes and reduced graphene oxide for high‐performance polymer solar cells. POLYM INT 2019. [DOI: 10.1002/pi.5872] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Samira Agbolaghi
- Chemical Engineering Department, Faculty of EngineeringAzarbaijan Shahid Madani University Tabriz Iran
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Agbolaghi S. Well‐functioned photovoltaics based on nanofibers composed of PBDT‐TIPS‐DTNT‐DT and graphenic precursors thermally modified by polythiophene, polyaniline and polypyrrole. POLYM INT 2019. [DOI: 10.1002/pi.5859] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Samira Agbolaghi
- Chemical Engineering Department, Faculty of EngineeringAzarbaijan Shahid Madani University Tabriz Iran
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Zhang X, Zhang M, Tong J, Guo P, Wang X, Liang Z, Wang Y, Xia Y. Synthesis and photovoltaic investigation of dithieno[2,3‐
d
:2′,3′‐
d
′]‐benzo[1,2‐
b
:3,4‐
b
′:5,6‐
d
″]trithiophene‐based conjugated polymer with an enlarged π‐conjugated system. POLYM ADVAN TECHNOL 2019. [DOI: 10.1002/pat.4562] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xiaofang Zhang
- Key Laboratory of Optoelectronic Technology and Intelligent Control of Ministry EducationLanzhou Jiaotong University Lanzhou PR China
| | - Minjing Zhang
- Key Laboratory of Optoelectronic Technology and Intelligent Control of Ministry EducationLanzhou Jiaotong University Lanzhou PR China
| | - Junfeng Tong
- Key Laboratory of Optoelectronic Technology and Intelligent Control of Ministry EducationLanzhou Jiaotong University Lanzhou PR China
- School of Materials Science and EngineeringLanzhou Jiaotong University Lanzhou PR China
| | - Pengzhi Guo
- National Green Coating Technology and Equipment Research CenterLanzhou Jiaotong University Lanzhou PR China
| | - Xunchang Wang
- CAS Key Laboratory of Bio‐based Materials, Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of Sciences Qingdao China
| | - Zezhou Liang
- Key Laboratory of Optoelectronic Technology and Intelligent Control of Ministry EducationLanzhou Jiaotong University Lanzhou PR China
| | - Yufei Wang
- Key Laboratory of Optoelectronic Technology and Intelligent Control of Ministry EducationLanzhou Jiaotong University Lanzhou PR China
| | - Yangjun Xia
- Key Laboratory of Optoelectronic Technology and Intelligent Control of Ministry EducationLanzhou Jiaotong University Lanzhou PR China
- School of Materials Science and EngineeringLanzhou Jiaotong University Lanzhou PR China
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Tong J, An L, Lv J, Guo P, Wang X, Yang C, Xia Y. Enhanced Photovoltaic Performance in D-π-A Copolymers Containing Triisopropylsilylethynyl-Substituted Dithienobenzodithiophene by Modulating the Electron-Deficient Units. Polymers (Basel) 2018; 11:E12. [PMID: 30959996 PMCID: PMC6401703 DOI: 10.3390/polym11010012] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 12/16/2018] [Accepted: 12/19/2018] [Indexed: 11/16/2022] Open
Abstract
Three alternated D-π-A type 5,10-bis(triisopropylsilylethynyl)dithieno[2,3-d:2',3'-d']-benzo[1,2-b:4,5-b']dithiophene (DTBDT-TIPS)-based semiconducting conjugated copolymers (CPs), PDTBDT-TIPS-DTBT-OD, PDTBDT-TIPS-DTFBT-OD, and PDTBDT-TIPS-DTNT-OD, bearing different A units, including benzothiadiazole (BT), 5,6-difluorinated-BT (FBT) and naphtho[1,2-c:5,6-c']-bis[1,2,5]thiadiazole (NT), were designed and synthesized to investigate the impact of the variation in electron-deficient units on the properties of these photovoltaic polymers. It was exhibited that the down-shifted highest occupied molecular orbital energy level (EHOMO), the enhanced aggregation in both the chlorobenzene solution and the solid film, as well as the better molecular planarity, were achieved using methods involving fluorination and the replacement of BT with NT on the polymer backbone. The absorption profile was little changed upon fluorination; however, it was greatly broadened during replacement of BT with NT. Consequently, the optimized photovoltaic device based on the PDTBDT-TIPS-DTNT-OD exhibited synchronous enhancements in the open-circuit voltage (VOC) of 0.88 V, the short-circuit current density (JSC) of 7.21 mA cm-2, and the fill factor (FF) of 52.99%, resulting in a drastic elevation in the PCE by 129% to 3.37% compared to that of the PDTBDT-TIPS-DTBT-OD. This was triggered by PDTBDT-TIPS-DTNT-OD's broadened absorption, deepened EHOMO, improved coplanarity, and enhanced SCLC mobility (which increased 3.9 times), as well as a favorable morphology of the active layer. Unfortunately, the corresponding PCE deteriorated after incorporating fluorine into the BT, due to the oversized aggregation and large phase separation morphology in the blend films, severely impairing its JSC. Our preliminary results demonstrated that the replacement of BT with NT in a D-π-A type polymer backbone was an effective strategy of tuning the molecular structure to achieve highly efficient polymer solar cells (PSCs).
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Affiliation(s)
- Junfeng Tong
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
| | - Lili An
- School of Chemical Engineering, Northwest Minzu University, Lanzhou 730030, China.
| | - Jie Lv
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
| | - Pengzhi Guo
- National Green Coating Technology and Equipment Research Center, Lanzhou Jiaotong University, Lanzhou 730070, China.
| | - Xunchang Wang
- CAS Key Laboratory of Bio-Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China.
| | - Chunyan Yang
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
| | - Yangjun Xia
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
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