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Articles by Wenyan Su
Polyfluorophenyl quinoxaline derived acceptors with long exciton diffusion length for efficient thin-film/thick-film organic solar cells
Abstract Designing small-molecule acceptors (SMAs) with long exciton diffusion length (LD) and high electron mobility is vital for boosting power conversion efficiency (PCE) of organic solar cells (OSCs). However, the limited LD of most advanced SMAs hinders their practical applications in thick-film OSCs. Herein, we develop four SMAs (named Yq-0F, Yq-2F, Yq-4F, and Yq-6F) with fluorine-free/fluorinated phenyl-substituted quinoxaline cores by manipulating the number of fluorine atom.
Dual-asymmetric backbone constructed polymerized small molecule acceptors for efficient all-polymer solar cells
Dual-asymmetric backbone constructed polymerized small molecule acceptors for efficient all-polymer solar cells† Side-chain engineering and asymmetric backbone design have been proven to effectively improve the photovoltaic performance of polymerized small molecule acceptors (PSMAs) in all-polymer solar cells (all-PSCs). However, the reported PSMAs all independently use the above strategies, making it difficult to finely tune their optoelectronic properties.
Halogenation Strategy of Thiophene Derived Solvent Additives Enables Optimized Morphology for Organic Solar Cells with 19.17% Efficiency
Conflict of Interest The authors declare no conflict of interest. Supporting Information Filename Description adfm202313744-sup-0001-SuppMat.pdf2 MB Supporting Information References 1, , , , , , , , , , , , , Science 2018, 361, 1094. 2, , , , , , , , , , , , , , , , , Nature 2021, 599, 67. 3, , , , , , , , , , , , , J. Am. Chem. Soc. 2020, 142, 20124. 4a) , , , , , , , , , , , Nat. Energy 2019, 4, 768; b) , , , , , , , , , , , Joule 2021, 5, 2408.
A case study on the thermal-stability of polymerized small molecular acceptor-based polymer solar cells
A case study on the thermal-stability of polymerized small molecular acceptor-based polymer solar cells† Hongmei Qin,a Shijie Ju,a Wenyan Su,*a Baofeng Zhao, b Qunping Fan, c Zhaozhao Bi,c Sen Zhang,c Jifa Yu,c Guanghao Lu, c Ji-Ting Hou, d Wei Ma,c Chao Gao *b and Yuxiang Li *a Abstract Despite the relatively unique advantages of morphological stability in PSMA-based polymer solar cells (PSCs), the microstructure evolution of the active layer over the thermal stress is highly sensitive to...
A Case Study on Thermal-stability of Polymerized Small Molecular Acceptor based Polymer Solar Cells
A Case Study on Thermal-stability of Polymerized Small Molecular Acceptor based Polymer Solar Cells Hongmei Qin, Shijie Ju, Wenyan Su, Baofeng Zhao, qunping fan, Zhaozhao Bi, Sen Zhang, Jifa Yu, Guanghao Lu, Ji-Ting Hou, Wei Ma, Chao Gao and Yuxiang Li Abstract Despite the relatively unique advantages in morphological stability in all-polymer solar cells (all-PSCs), the microstructure evolution of the active layer over the thermal stress being highly sensitive to the degraded efficiency still...
13.4 % Efficiency from All‐Small‐Molecule Organic Solar Cells Based on a Crystalline Donor with Chlorine and Trialkylsilyl Substitutions
Abstract How to simultaneously achieve both high open-circuit voltage (Voc) and high short-circuit current density (Jsc) is a big challenge for realising high power conversion efficiency (PCE) in all-small-molecule organic solar cells (all-SM OSCs). Herein, a novel small molecule (SM)-donor, namely FYSM−SiCl, with trialkylsilyl and chlorine substitutions was designed and synthesized.
A Non‐Conjugated Polymer Acceptor for Efficient and Thermally Stable All‐Polymer Solar Cells
Abstract A non‐conjugated polymer acceptor PF1‐TS4 was firstly synthesized by embedding a thioalkyl segment in the mainchain, which shows excellent photophysical properties on par with a fully conjugated polymer, with a low optical band gap of 1.58 eV and a high absorption coefficient >105 cm−1, a high LUMO level of −3.89 eV, and suitable crystallinity.
The Role of Connectivity on Significant Bandgap Narrowing for Fused-Pyrene based Non-Fullerene Acceptors toward High-Efficiency Organic Solar Cells
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Overcoming the energy loss in asymmetrical non-fullerene acceptor-based polymer solar cells by halogenation of polymer donors
Overcoming the energy loss in asymmetrical non-fullerene acceptor-based polymer solar cells by halogenation of polymer donors To achieve efficient polymer solar cells (PSCs), it is important to overcome the energy loss (Eloss) from the optical bandgap to open-circuit voltage (Voc) of the device by properly matching donor/acceptor (D/A) photovoltaic materials.
Nonhalogen solvent-processed polymer solar cells based on chlorine and trialkylsilyl substituted conjugated polymers achieve 12.8% efficiency
Nonhalogen solvent-processed polymer solar cells based on chlorine and trialkylsilyl substituted conjugated polymers achieve 12.8% efficiency Wenyan Su,a Guangwei Li,a Qunping Fan,a Qinglian Zhu,b Xia Guo,a Juan Chen,a Jingnan Wu,a Wei Ma,*b Maojie Zhang*a and Yongfang Liac Author affiliations * Corresponding authors a Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China E-mail:...
Nonhalogen solvent-processed high efficiency polymer solar cells based on polymer donor containing chlorine and trialkylsilyl substituted thienyl benzodithiophene donor unit
W. Su, G. L. Li, Q. Fan, Q. Zhu, X. Guo, J. Chen, J. Wu, W. Ma, M. Zhang and Y. Li, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA10662B If you are not the author of this article and you wish to reproduce material from it in a third party non-RSC publication you must formally request permission using Copyright Clearance Center. Go to our Instructions for using Copyright Clearance Center page for details.
Efficient and thermally stable all-polymer solar cells based on a fluorinated wide bandgap polymer donor with high crystallinity
All-polymer solar cells (all-PSCs) based on n-type polymer as acceptor and p-type polymer as donor materials have attracted great attention due to their excellent device stability. However, a systematic study of thermal stability for all-PSCs has not been reported to date. Herein, we developed a high efficiency and thermally stable all-PSCs based on a fluorinated wide bandgap polymer donor (PFBZ) and a narrow bandgap polymer acceptor (N2200).
Significant enhancement of photovoltaic performance of organic small molecule acceptor via side-chain engineering
To achieve efficient polymer solar cells (PSCs), it is important to increase the optical absorption coefficient and charge mobility of photovoltaic materials for obtaining high the short-circuit current density (Jsc) and fill factor (FF) in the devices that do not sacrifice open-circuit voltage (Voc).
High-performance nonfullerene polymer solar cells based on fluorinated wide bandgap copolymer with a high open-circuit voltage of 1.04 V
In this work, an efficient nonfullerene (NF) polymer solar cells (PSCs) based on a polymer donor PM6 containing fluorinated-thienyl benzodithiophene unit and a small molecule acceptor ITIC was developed.
Side-chain Engineering for Efficient Non-fullerene Polymer Solar Cells Based on Wide-bandgap Polymer Donor
In this work, a new wide bandgap polymer of PSBZ based on thienyl substituted benzodithiophene (BDTT) as donor unit and difluorobenzotriazole (BTz-2F) as acceptor unit was synthesized for photovoltaic applications.
A 1,1'-vinylene-fused indacenodithiophene-based low bandgap polymer for efficient polymer solar cells
A 1,1'-vinylene-fused indacenodithiophene (IDTV) donor unit with 22 ?-conjugated electrons was synthesized. Ladder-type D-A copolymer PIDTV-ffBT using IDTV as donor unit and 5,6-difluorobenzothiadiazole (ffBT) as acceptor unit was developed for the application as donor material in polymer solar cells (PSCs). Compared to other analogue polymers, PIDTV-ffBT possesses two-dimension conjugated multi-electrons fused-ring, excellent planarity and closely ?-?
Efficient ternary blend all-polymer solar cells with a polythiophene derivative as hole-cascade material
Ternary blending is one of the effective strategies to broaden the complementary absorption range and smooth the energy level at the donor/acceptor interface for achieving high efficiency bulk heterojuction (BHJ) polymer solar cells (PSCs). In this study, we report the efficient ternary blend all-polymer PSCs (all-PSCs) with complementary absorption bands based on two polymer donors PTB7-Th and PBDD-ff4T and one polymer acceptor N2200.
Efficient polymer solar cells based on a new quinoxaline derivative with fluorinated phenyl side chain
A novel donor-π-acceptor (D-π-A) type polymer of PBDTT-DTFPQx composed of a medium electron-donating 5,8-dialkylthienyl substituted benzo[1,2-b:4,5-b´]dithiophene (BDTT) moiety and a strong electron-accepting 4-fluorophenyl substituted 6,7-dioctyloxyquinoxaline (FPQx) with thiophene π-bridge units was synthesized and characterized, as the donor material for polymer solar cells (PSCs).
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