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Weng N, Liao Q, Li X, Zhang Z, Huang T, Wang D, Xiong J, Zhang J. Reducing Interfacial Losses in Solution-Processed Integrated Perovskite-Organic Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2024; 16:10170-10179. [PMID: 38359458 DOI: 10.1021/acsami.3c18471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
Low bandgap organic semiconductors have been widely employed to broaden the light response range to utilize much more photons in the inverted perovskite solar cells (PSCs). However, the serious charge recombination at the heterointerface contact between perovskite and organic semiconductors usually leads to large energy loss and limits the device performance. In this work, a titanium chelate, bis(2,4-pentanedionato) titanium(IV) oxide (C10H14O5Ti), was directly used as an interlayer between the perovskite layer and organic bulk heterojunction layer for the first time. Impressively, it was found that C10H14O5Ti can not only increase the surface potential of perovskite films but also show a positive passivation effect toward the perovskite film surface. Drawing from the above function, a smoother perovskite active layer with a higher work function was realized upon the use of C10H14O5Ti. As a result, the C10H14O5Ti-modified integrated devices show lower interfacial loss and obtain the best power conversion efficiency (PCE) of up to 20.91% with a high voltage of 1.15 V. The research offers a promising strategy to minimize the interfacial loss for the preparation of high-performance perovskite solar cells.
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Affiliation(s)
- Nan Weng
- Engineering Research Center of Electronic Information Materials and Devices (Ministry of Education), Guangxi Key Laboratory of Information Materials, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China
| | - Qiaogan Liao
- Engineering Research Center of Electronic Information Materials and Devices (Ministry of Education), Guangxi Key Laboratory of Information Materials, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China
| | - Xiao Li
- Engineering Research Center of Electronic Information Materials and Devices (Ministry of Education), Guangxi Key Laboratory of Information Materials, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China
| | - Zheling Zhang
- Engineering Research Center of Electronic Information Materials and Devices (Ministry of Education), Guangxi Key Laboratory of Information Materials, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China
| | - Tianhuan Huang
- Engineering Research Center of Electronic Information Materials and Devices (Ministry of Education), Guangxi Key Laboratory of Information Materials, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China
| | - Dongjie Wang
- Engineering Research Center of Electronic Information Materials and Devices (Ministry of Education), Guangxi Key Laboratory of Information Materials, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China
| | - Jian Xiong
- Engineering Research Center of Electronic Information Materials and Devices (Ministry of Education), Guangxi Key Laboratory of Information Materials, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China
| | - Jian Zhang
- Engineering Research Center of Electronic Information Materials and Devices (Ministry of Education), Guangxi Key Laboratory of Information Materials, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China
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Huang J, Yang J, Sun H, Feng K, Liao Q, Li B, Yan H, Guo X. A
Cost‐Effective D‐A‐D
Type
Hole‐Transport
Material Enabling 20% Efficiency Inverted Perovskite Solar Cells
†. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100022] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Jiachen Huang
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech) No. 1088, Xueyuan Road Shenzhen Guangdong 518055 China
- Department of Chemistry, The Hong Kong University of Science and Technology Clear Water Bay Hong Kong, China
| | - Jie Yang
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech) No. 1088, Xueyuan Road Shenzhen Guangdong 518055 China
| | - Huiliang Sun
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech) No. 1088, Xueyuan Road Shenzhen Guangdong 518055 China
| | - Kui Feng
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech) No. 1088, Xueyuan Road Shenzhen Guangdong 518055 China
| | - Qiaogan Liao
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech) No. 1088, Xueyuan Road Shenzhen Guangdong 518055 China
- School of Materials Science and Engineering, Harbin Institute of Technology Harbin Heilongjiang 150001 China
| | - Bolin Li
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech) No. 1088, Xueyuan Road Shenzhen Guangdong 518055 China
| | - He Yan
- Department of Chemistry, The Hong Kong University of Science and Technology Clear Water Bay Hong Kong, China
| | - Xugang Guo
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech) No. 1088, Xueyuan Road Shenzhen Guangdong 518055 China
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Liao Q, Wang Y, Yao X, Su M, Li B, Sun H, Huang J, Guo X. A Dual-Functional Conjugated Polymer as an Efficient Hole-Transporting Layer for High-Performance Inverted Perovskite Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2021; 13:16744-16753. [PMID: 33818080 DOI: 10.1021/acsami.1c00729] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Conductive polyelectrolytes such as P3CT-Na have been widely used as efficient hole-transporting layers (HTLs) in inverted perovskite solar cells (PSCs) due to their high hole mobility. However, the acid-base neutralization reaction is indispensable for preparing such polyelectrolytes and the varied content of cations usually leads to poor reproducibility of the device performance in PSCs. In this work, a commercially available polymer poly[3-(4-carboxybutyl)thiophene-2,5-diyl] (P3CT) was directly applied as an HTL in PSCs for the first time. Encouragingly, it was found that due to the dual functionality of carboxyl groups on side chains, a thin layer of P3CT can not only strongly anchor on ITO electrode and optimize its work function but also show an effective passivation effect toward perovskite active layer. Benefiting from such dual functionality, a uniform perovskite film with better quality was obtained on P3CT. As a result, the P3CT-based PSCs show much lower nonradiative recombination and achieve a champion power conversion efficiency (PCE) of 21.33% with a high fill factor (FF) of 83.6%. Impressively, as the device area is increased to 0.80 cm2, a PCE of 19.65% can still be obtained for the PSCs based on P3CT HTL. Our work provides important strategy for developing HTLs for high-performance PSCs.
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Affiliation(s)
- Qiaogan Liao
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen 518055, Guangdong, China
| | - Yang Wang
- College of Materials, Fujian Key Laboratory of Advanced Materials, Xiamen University, Xiamen 361005, Fujian China
| | - Xiyu Yao
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen 518055, Guangdong, China
| | - Mengyao Su
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen 518055, Guangdong, China
| | - Bolin Li
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen 518055, Guangdong, China
| | - Huiliang Sun
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen 518055, Guangdong, China
| | - Jiachen Huang
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen 518055, Guangdong, China
| | - Xugang Guo
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen 518055, Guangdong, China
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Wang Y, Liao Q, Chen J, Huang W, Zhuang X, Tang Y, Li B, Yao X, Feng X, Zhang X, Su M, He Z, Marks TJ, Facchetti A, Guo X. Teaching an Old Anchoring Group New Tricks: Enabling Low-Cost, Eco-Friendly Hole-Transporting Materials for Efficient and Stable Perovskite Solar Cells. J Am Chem Soc 2020; 142:16632-16643. [DOI: 10.1021/jacs.0c06373] [Citation(s) in RCA: 82] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yang Wang
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, Guangdong 518055, China
| | - Qiaogan Liao
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, Guangdong 518055, China
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Jianhua Chen
- Department of Chemistry and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Wei Huang
- Department of Chemistry and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Xinming Zhuang
- Department of Chemistry and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Yumin Tang
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, Guangdong 518055, China
| | - Bolin Li
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, Guangdong 518055, China
| | - Xiyu Yao
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, Guangdong 518055, China
| | - Xiyuan Feng
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, Guangdong 518055, China
| | - Xianhe Zhang
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, Guangdong 518055, China
| | - Mengyao Su
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, Guangdong 518055, China
| | - Zhubing He
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, Guangdong 518055, China
| | - Tobin J. Marks
- Department of Chemistry and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Antonio Facchetti
- Department of Chemistry and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Xugang Guo
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, Guangdong 518055, China
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5
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Luo Z, Ma R, Xiao Y, Liu T, Sun H, Su M, Guo Q, Li G, Gao W, Chen Y, Zou Y, Guo X, Zhang M, Lu X, Yan H, Yang C. Conformation-Tuning Effect of Asymmetric Small Molecule Acceptors on Molecular Packing, Interaction, and Photovoltaic Performance. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2001942. [PMID: 32602255 DOI: 10.1002/smll.202001942] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 05/31/2020] [Indexed: 05/20/2023]
Abstract
Understanding the conformation effect on molecular packing, miscibility, and photovoltaic performance is important to open a new avenue for small-molecule acceptor (SMA) design. Herein, two novel acceptor-(donor-acceptor1-donor)-acceptor (A-DA1D-A)-type asymmetric SMAs are developed, namely C-shaped BDTP-4F and S-shaped BTDTP-4F. The BDTP-4F-based polymer solar cells (PSCs) with PM6 as donor, yields a power conversion efficiency (PCE) of 15.24%, significantly higher than that of the BTDTP-4F-based device (13.12%). The better PCE for BDTP-4F-based device is mainly attributed to more balanced charge transport, weaker bimolecular recombination, and more favorable morphology. Additionally, two traditional A-D-A-type SMAs (IDTP-4F and IDTTP-4F) are also synthesized to investigate the conformation effect on morphology and device performance. Different from the device result above, here, IDTP-4F with S-shape conformation outperforms than IDTTP-4F with C-shape conformation. Importantly, it is found that for these two different types of SMA, the better performing binary blend has similar morphological characteristics. Specifically, both PM6:BDTP-4F and PM6:IDTP-4F blend exhibit perfect nanofibril network structure with proper domain size, obvious face-on orientation and enhance donor-acceptor interactions, thereby better device performance. This work indicates tuning molecular conformation plays pivotal role in morphology and device effciciency, shining a light on the molecular design of the SMAs.
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Affiliation(s)
- Zhenghui Luo
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China
- Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, 999077, China
| | - Ruijie Ma
- Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, 999077, China
| | - Yiqun Xiao
- Department of Physics, Chinese University of Hong Kong, New Territories, Hong Kong, 999077, P. R. China
| | - Tao Liu
- Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, 999077, China
| | - Huiliang Sun
- Department of Materials Science and Engineering and The Shenzhen Key Laboratory for Printed Organic Electronics, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, Guangdong, 518055, China
| | - Mengyao Su
- Department of Materials Science and Engineering and The Shenzhen Key Laboratory for Printed Organic Electronics, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, Guangdong, 518055, China
| | - Qing Guo
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Laboratory of Advanced Optoelectronic Materials, Soochow University, Suzhou, 215123, China
| | - Guanghao Li
- Department of Chemistry, Wuhan University, Wuhan, 430072, China
| | - Wei Gao
- Department of Chemistry, Wuhan University, Wuhan, 430072, China
| | - Yuzhong Chen
- Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, 999077, China
| | - Yang Zou
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Xugang Guo
- Department of Materials Science and Engineering and The Shenzhen Key Laboratory for Printed Organic Electronics, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, Guangdong, 518055, China
| | - Maojie Zhang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Laboratory of Advanced Optoelectronic Materials, Soochow University, Suzhou, 215123, China
| | - Xinhui Lu
- Department of Physics, Chinese University of Hong Kong, New Territories, Hong Kong, 999077, P. R. China
| | - He Yan
- Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, 999077, China
| | - Chuluo Yang
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China
- Department of Chemistry, Wuhan University, Wuhan, 430072, China
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Zhang Y, Wang Y, Ma R, Luo Z, Liu T, Kang SH, Yan H, Yuan Z, Yang C, Chen Y. Wide Band-gap Two-dimension Conjugated Polymer Donors with Different Amounts of Chlorine Substitution on Alkoxyphenyl Conjugated Side Chains for Non-fullerene Polymer Solar Cells. CHINESE JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1007/s10118-020-2435-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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An Q, Wang J, Gao W, Ma X, Hu Z, Gao J, Xu C, Hao M, Zhang X, Yang C, Zhang F. Alloy-like ternary polymer solar cells with over 17.2% efficiency. Sci Bull (Beijing) 2020; 65:538-545. [PMID: 36659185 DOI: 10.1016/j.scib.2020.01.012] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 12/26/2019] [Accepted: 01/09/2020] [Indexed: 01/21/2023]
Abstract
Ternary strategy has been considered as an efficient method to achieve high performance polymer solar cells (PSCs). A power conversion efficiency (PCE) of 17.22% is achieved in the optimized ternary PSCs with 10 wt% MF1 in acceptors. The over 8% PCE improvement by employing ternary strategy is attributed to the simultaneously increased JSC of 25.68 mA cm-2, VOC of 0.853 V and FF of 78.61% compared with Y6 based binary PSCs. The good compatibility of MF1 and Y6 can be confirmed from Raman mapping, contact angle, cyclic voltammetry and morphology, which is the prerequisite to form alloy-like state. Electron mobility in ternary active layers strongly depends on MF1 content in acceptors due to the different lowest unoccupied molecular orbital (LUMO) levels of Y6 and MF1, which can well explain the wave-like varied FF of ternary PSCs. The third-party certified PCE of 16.8% should be one of the highest values for single bulk heterojunction PSCs. This work provides sufficient references for selecting materials to achieve efficient ternary PSCs.
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Affiliation(s)
- Qiaoshi An
- School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
| | - Jian Wang
- College of Physics and Electronic Engineering, Taishan University, Taian 271021, China
| | - Wei Gao
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China; Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan 400072, China
| | - Xiaoling Ma
- School of Science, Beijing Jiaotong University, Beijing 100044, China
| | - Zhenghao Hu
- School of Science, Beijing Jiaotong University, Beijing 100044, China
| | - Jinhua Gao
- School of Science, Beijing Jiaotong University, Beijing 100044, China
| | - Chunyu Xu
- School of Science, Beijing Jiaotong University, Beijing 100044, China
| | - Minghui Hao
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China
| | - Xiaoli Zhang
- State Centre for International Cooperation on Designer Low-Carbon & Environmental Materials, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Chuluo Yang
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China; Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan 400072, China.
| | - Fujun Zhang
- School of Science, Beijing Jiaotong University, Beijing 100044, China.
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Keshtov ML, Kuklin SA, Konstantinov IO, Khokhlov AR, Xie Z, Dou C, Koukaras EN, Suthar R, Sharma GD. Synthesis and Photovoltaic Properties of New Conjugated D‐A Polymers Based on the Same Fluoro‐Benzothiadiazole Acceptor Unit and Different Donor Units. ChemistrySelect 2020. [DOI: 10.1002/slct.201904353] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mukhaned L Keshtov
- Institute of Organoelement Compounds of the Russian Academy of Sciences Vavilova St., 28 119991 Moscow Russian Federation
| | - Serge. A. Kuklin
- Institute of Organoelement Compounds of the Russian Academy of Sciences Vavilova St., 28 119991 Moscow Russian Federation
| | - Igor O. Konstantinov
- Institute of Organoelement Compounds of the Russian Academy of Sciences Vavilova St., 28 119991 Moscow Russian Federation
| | - Alexei R. Khokhlov
- Department of Physics of Polymers and Crystals, Faculty of Physics M.V. Lomonosov Moscow State University Leninskie Gory 1 119991 Moscow Russia
| | - Zhiyuan Xie
- Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China
| | - Chuandong Dou
- Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China
| | - Emmanuel N. Koukaras
- Laboratory of Quantum and Computational Chemistry, Department of Chemistry Aristotle University of Thessaloniki, GR- 54124 Thessaloniki Greece
| | - Rakesh Suthar
- Department of Physics The LNM Institute for Information Technology, Jamdoli, Jaipur 302031, India
| | - Ganesh D. Sharma
- Department of Physics The LNM Institute for Information Technology, Jamdoli, Jaipur 302031, India
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Meng H, Li Y, Pang B, Li Y, Xiang Y, Guo L, Li X, Zhan C, Huang J. Effects of Halogenation in B ← N Embedded Polymer Acceptors on Performance of All-Polymer Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2020; 12:2733-2742. [PMID: 31856566 DOI: 10.1021/acsami.9b20214] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Halogenation, for example, fluorination and chlorination, is an effective strategy to regulate the performance of organic photovoltaic materials. Although fluorination has been widely applied to polymer acceptors, systematic studies on the comparison of nonhalogenated, fluorinated, and chlorinated polymer acceptors have been a blank to now. Herein, a B ← N embedded electron-deficient unit (A), namely, BNIDT was copolymerized with three electron-rich units (D), that is, benzodithiophene (BDT), fluorinated BDT, and chlorinated BDT to obtain three D-A polymers of BN-BDT, BN-BDT-F, and BN-BDT-Cl, respectively. The three polymers exhibit similar LUMOs of ca. -3.77 eV, whereas the HOMOs are remarkably decreased from BN-BDT (-5.46 eV) to BN-BDT-F (-5.71 eV) and further slightly lowered to BN-BDT-Cl (-5.74 eV). All-polymer solar cells (all-PSCs) were fabricated using PBDB-T as the donor and the three B ← N-based polymers as the acceptors. The efficiencies of all-PSCs were significantly promoted from nonhalogenated BN-BDT (1.60%) to fluorinated BN-BDT-F (3.71%) and further elevated to chlorinated BN-BDT-Cl (4.23%). Device characterizations revealed that halogenation on the polymer acceptors leads to enhanced hole-transfer driving forces and better donor/acceptor miscibility, for example, smaller domain sizes and root-mean-square roughness (rms) values, which further gives rise to higher and more balanced hole/electron mobilities and efficient physical processes, for example, efficient exciton dissociation and collection and weaker recombination losses in halogenated devices. This work demonstrates that the photovoltaic performance of nonhalogenated polymer acceptors can be remarkably boosted by fluorination and further enhanced by chlorination. This is the first systematic study on the halogenated polymer acceptors by comprehensively comparing nonhalogenated, fluorinated, and chlorinated ones.
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Affiliation(s)
- Huifeng Meng
- College of Materials Science and Engineering , Huaqiao University , Xiamen 361021 , P. R. China
- CAS Key Laboratory of Photochemistry, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China
| | - Yongchun Li
- College of Materials Science and Engineering , Huaqiao University , Xiamen 361021 , P. R. China
- CAS Key Laboratory of Photochemistry, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China
| | - Bo Pang
- College of Materials Science and Engineering , Huaqiao University , Xiamen 361021 , P. R. China
| | - Yuqing Li
- College of Materials Science and Engineering , Huaqiao University , Xiamen 361021 , P. R. China
- CAS Key Laboratory of Photochemistry, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China
| | - Ying Xiang
- College of Materials Science and Engineering , Huaqiao University , Xiamen 361021 , P. R. China
| | - Liang Guo
- College of Materials Science and Engineering , Huaqiao University , Xiamen 361021 , P. R. China
| | - Xuemei Li
- School of Chemistry & Chemical Engineering , Linyi University , Linyi 276000 , China
| | - Chuanlang Zhan
- CAS Key Laboratory of Photochemistry, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China
| | - Jianhua Huang
- College of Materials Science and Engineering , Huaqiao University , Xiamen 361021 , P. R. China
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