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P-doped all-small-molecule organic solar cells with power conversion efficiency of 17.73%

Science China Chemistry 2023年第8期66卷 2371-2379页

作者： Wanying Feng Kangqiao Ma Guangkun Song Tianyin Shao Huazhe Liang Shudi Lu Yu Chen Guankui Long Chenxi Li Xiangjian Wan Zhaoyang Yao Bin Kan Yongsheng Chen State Key Laboratory and Institute of Element-Organic Chemistry The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer MaterialsRenewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin300071China School of Materials Science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjin300350China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing100043China State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou510640China

All-small organic solar cells(ASM OSCs)inherit the advantages of the distinct merits of small molecules,such as well-defined structures and less batch-to-batch variation.In comparison with the rapid development of polymer-based OSCs,more efforts are needed to devote to improving the performance of ASM OSCs to close the performance gap between ASM and polymer-based OSCs.Herein,a well-known p-dopant named fluoro-7,7,8,8-tetracyano-p-quinodimethane(FTCNQ)was introduced to a highefficiency system of HD-1:BTP-e C9,and a high power conversion efficiency(PCE)of 17.15%was achieved due to the improved electrical properties as well as better morphology of the active layer,supported by the observed higher fill factor(FF)of 79.45%and suppressed non-radiative recombination loss.Furthermore,combining with the further morphology optimization from solvent additive of 1-iodonaphthalene(IN)in the blend film,the HD-1:BTP-e C9-based device with the synergistic effects of both FTCNQ and IN demonstrates a remarkable PCE of 17.73%(certified as 17.49%),representing the best result of binary ASM OSCs to date.

关键词： organic solar cells all-small-molecule power conversion efficiency p-dopant

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Ternary organic solar cells offer 14% power conversion efficiency

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Science Bulletin 2017年第23期62卷 1562-1564页

作者： Zuo Xiao Xue Jia Liming Ding Center for Excellence in Nanoscience (CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS) National Center for Nanoscience and TechnologyBeijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China

Organic solar cells(OSCs)have advantages like light-weight,flexibility,colorfulness and solution processability[1].The active layer of OSCs generally contains two organic semiconductors:an electron donor and an electron acceptor.The donor and acceptor make nanoscale phase separation to allow efficient exciton dissociation and also form a three-dimensional(3D)passage to

关键词： PTB BM PCE power conversion efficiency Ternary organic solar cells offer 14

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Optimal oxide-aperture for improving the power conversion efficiency of VCSEL arrays

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Chinese Physics B 2015年第2期24卷 181-185页

作者：王文娟李冲周弘毅武华栾信信史磊郭霞 Photonic Device Research Laboratory Institute of Electronic Information and Control EngineeringBeijing University of Technology

The maximum power conversion efficiencies of the top-emitting,oxide-confined,two-dimensional integrated 2×2 and4×4 vertical-cavity surface-emitting laser（VCSEL） arrays with the oxide-apertures of 6 μm,16 μm,19 μm,26 μm,29 μm,36 μm,39 μm,and 46 urn are fabricated and characterized,respectively.The maximum power conversion efficiencies increase rapidly with the augment of oxide-aperture at the beginning and then decrease slowly.A maximum value of27.91%at an oxide-aperture of 18.6 μm is achieved by simulation.The experimental data are well consistent with the simulation results,which are analyzed by utilizing an empirical model.

关键词： vertical-cavity surface-emitting laser arrays power conversion efficiency oxide-aperture

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Tandem organic solar cells with 20.6% efficiency enabled by reduced voltage losses

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National Science Review 2023年第6期10卷 215-225页

作者： Jianqiu Wang Zhong Zheng Pengqing Bi Zhihao Chen Yafei Wang Xiaoyu Liu Shaoqing Zhang Xiaotao Hao Maojie Zhang Yongfang Li Jianhui Hou State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductoroptoelectronics Materials and Devices College of Chemistry Chemical Engineering and Materials Science Soochow University School of Chemistry and Biology Engineering University of Science and Technology Beijing School of Physics State Key Laboratory of Crystal Materials Shandong University University of Chinese Academy of Sciences CAS Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences

Large voltage losses are the main obstacle for achieving high efficiency in organic solar cells(OSCs).Here we construct ternary OSCs by introducing an asymmetric small molecule acceptor AITC into PBDB-TCl:BTP-eC9 system and demonstrate the effectiveness in simultaneously decreasing energy disorder and non-radiative voltage losses.It is found that the introduction of AITC can modify domain size and increase the degree of crystallinity,which enhances open-circuit voltage and power conversion efficiency(19.1%,certified as 18.9%).Inspiringly,an output efficiency of 20.6% of the constructed tandem OSCs based on PBDB-TCl:AITC:BTP-eC9 ternary active layer output a recorded efficiency of 20.6%(certified as 20.3%),which is the highest value in OSCs field to date.This work demonstrates that decreasing the voltage losses by ternary strategy and constructing of tandem architecture are effective approaches towards improving photovoltaic performance.

关键词： organic solar cells power conversion efficiency voltage losses tandem cells ternary strategy

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简单低聚物交联法获得20.32%效率的高机械稳定性和高工作稳定性柔性倒置钙钛矿太阳能电池

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Science Bulletin 2022年第8期67卷 794-802,M0003页

作者：姜乃熔邢邦昱王一凡张翰文银达刘岳峰毕宴钢张立军冯晶孙洪波 State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China State Key Laboratory of Integrated Optoelectronics College of Materials Science and EngineeringJilin UniversityChangchun 130012China State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentTsinghua UniversityBeijing 100084China

钛性钙钛矿太阳能电池因其在柔性可穿戴电子领域的巨大应用潜力而备受关注.然而,钙钛矿薄膜对水氧、温度和光照等外界环境敏感,同时柔性钙钛矿电池的反复弯折也会加速钙钛矿薄膜光电性能的退化,导致柔性钙钛矿太阳能电池的工作稳定性和... 详细信息

钛性钙钛矿太阳能电池因其在柔性可穿戴电子领域的巨大应用潜力而备受关注.然而,钙钛矿薄膜对水氧、温度和光照等外界环境敏感,同时柔性钙钛矿电池的反复弯折也会加速钙钛矿薄膜光电性能的退化,导致柔性钙钛矿太阳能电池的工作稳定性和机械稳定性还远不能满足实际应用需求.本文提出了一种简单的低聚物交联方法,将三羟甲基丙烷乙氧基化物三丙烯酸酯(TET)作为掺杂剂掺入钙钛矿薄膜,交联聚合物在钝化和加固钙钛矿晶界的同时,也促进了钙钛矿晶粒的生长,柔性钙钛矿电池的效率、工作稳定性和机械稳定性获得了同步提升.倒置柔性钙钛矿太阳能电池的效率达到20.32%,85℃高温500 h、连续光照900 h或4 mm弯曲半径下弯折两万次,效率均能维持初始值85%以上.

关键词： Flexible perovskite solar cells Oligomer cross-linking power conversion efficiency Trimethylolpropane ethoxylate triacrylate

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Beyond two-dimension: One-and zero-dimensional halide perovskites as new-generation passivators for high-performance perovskite solar cells

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能源化学:英文版 2023年第8期83卷 189-208,I0007页

作者： Yuanyuan Zhao Huimin Xiang Ran Ran Wei Zhou Wei Wang Zongping Shao State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009JiangsuChina WA School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityPerthWA 6845Australia

Perovskite solar cells(PSCs) as a rising star in the photovoltaic field have received rapidly increasing attention recently due to the boosting power conversion efficiencies(PCEs) from 3.8% to 25.7% in the last13 years. Nevertheless, the conventional PSCs with three-dimensional(3D) halide perovskites as light absorbers suffer from inferior PCEs and poor durability under sunlight, high-temperature and humid conditions due to the high defect amount and structural instability of 3D perovskites, respectively. To tackle these crucial issues, lower-dimensional halide perovskites including zero-dimensional(0D), onedimensional(1D), and two-dimensional(2D) perovskites have been employed as efficient passivators to boost the PCEs and durability of 3D-PSCs due to the high structural stability and superior resistance against moisture, heat and sunlight. Therefore, in order to achieve better understanding about the advantages and superiorities of combining low-dimensional perovskites with their 3D counterparts in improving the PCEs and durability of 3D-PSCs, the recent advances in the development and fabrication of mixeddimensional PSCs with 1D/0D perovskites as passivators are summarized and discussed in the review.The superiority of 1D/0D perovskites as passivators over 2D counterparts, the passivation mechanism and the methods of 1D/0D perovskites are also presented and discussed. Furthermore, the rules to choose1D/0D perovskites or relevant spacer cations are also emphasized. On this basis, several specific strategies to design and fabricate mixed-dimensional PSCs with 1D/0D perovskites are presented and discussed.Finally, the crucial challenges and future research directions of mixed-dimensional PSCs with 1D/0D perovskites as passivators are also proposed and discussed. This review will provide some useful insights for the future development of high-efficiency and durable mixed-dimensional PSCs.

关键词： Perovskite solar cells Mixed-dimensional Passivators Stability power conversion efficiency

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efficiency enhancement of Cs_(0.1)(CH_(3)NH_(3))_(0.9)PbI_(3) perovskite solar cell by surface passivation using iso-butyl ammonium iodide

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International Journal of Minerals,Metallurgy and Materials 2022年第11期29卷 1963-1970页

作者： Wakul Bumrungsan Kritsada Hongsith Vasan Yarangsi Pisith Kumnorkeaw Sukrit Sucharitakul Surachet Phaduangdhitidhada Supab Choopun Research Center in Physics and Astronomy Department of Physics and Materials Science Faculty of ScienceChiang Mai UniversityChiang Mai 50200Thailand Thailand Center Excellence in Physics Ministry of Higher EducationScienceResearch and InnovationBangkok 10400Thailand National Nanotechnology Center National Science and Technology Development AgencyPathum Thani 12120Thailand

efficiency enhancement of Cs_(0.1)(CH_(3)NH_(3))_(0.9)PbI_(3) solar cell devices was performed by using iso-butyl ammonium iodide(IBA)passivated on Cs_(0.1)(CH_(3)NH_(3))_(0.9)PbI_(3) films.The n-i-p structure of perovskite solar cell devices was fabricated with the structure of FTO/SnO_(2)/Cs_(0.1)(CH_(3)NH_(3))_(0.9)PbI_(3)(FTO,i.e.,fluorine doped tin oxide)and IBA/Spiro-OMeTAD/Ag.The effect of different weights of IBA passivated on Cs-doped perovskite solar cells(PSCs)was systematically investigated and compared with non-passivated devices.It was found that the 5-mg IBA-passivated devices exhibited a high power conversion efficiency(PCE)of 15.49%higher than 12.64%of non-IBA-passivated devices.The improvement of photovoltaic parameters of the 5-mg IBA-passivated device can be clearly observed compared to the Cs-doped device.The better performance of the IBA-passivated device can be confirmed by the reduction of PbI_(2) phase in the crystal structure,lower charge recombination rate,lower charge transfer resistance,and improved contact angle of perovskite films.Therefore,IBA passivation on Cs_(0.1)(CH_(3)NH)_(0.9)PbI_(3) is a promising technique to improve the efficiency of Cs-doped perovskite solar cells.

关键词： perovskite solar cell power conversion efficiency surface passivation cesium methylammonium lead iodide iso-butyl ammoni-um iodide

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Manipulating Nanowires in Interconnecting Layer for Efficient Tandem Organic Photovoltaics

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Chinese Journal of Chemistry 2024年第4期42卷 377-383页

作者： Yanjie Tang Jiaming Fu Hao Li Du Hyeon Ryu Won Suk Shin Jianqi Zhang Yi Yang Yiming Yang Deyuan Li Zhong Zheng Shaoqing Zhang Jianhui Hou School of Chemistry and Biology Engineering University of Science and Technology Beijing(USTB)Beijing100083 China State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of Sciences(ICCAS)Beijing100190 China Energy Materials Research Center Korea Research Institute of Chemical Technology(KRICT)Advanced Materials&Chemical EngineeringUniversity of Science&Technology(UST)Korea The National Center for Nanoscience and Technology(NCNST) Beijing100190 China University of Chinese Academy of Sciences Beijing(UCAS) Beijing100049 China China Railway Resources Group Survey and Design Co.Ltd. LangfangHebei065000 China

Owing to the function of manipulating light absorption distribution,tandem organic solar cells containing multiple sub-cells exhibit high power conversion efficiencies.However,there is a substantial challenge in precisely controlling the inter-subcells carrier migration which determines the balance of charge transport across the entire device.The conductivity of"nanowires"-like conducting channel in interconnecting layer between sub-cells should be improved which calls for fine engineering on the morphology of polyelectrolyte in interconnecting layer.Here,we develop a simple method to effectively manipulating the domains of conductive components in commercially available polyelectrolyte PEDOT:PSs.The use of poor solvent could effectively modify the configuration of polystyrene sulfonic acid and thus the space for conductive components.Based on our strategy,the insulated shells wrapping conductive domains are thinned and the efficiencies of tandem organic solar cells are improved.We believe our method might provide guidance for the manufacture of tandem organic solar cells.

关键词： Tandem organic solar cells power conversion efficiency interconnecting layer Tunneling junction Interfacial layers Conformationanalysis π-πstacking Donor-acceptorsystems

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Approaching 19%efficiency and stable binary polymer solar cells enabled by a solidification strategy of solvent additive

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Science China Chemistry 2023年第5期66卷 1500-1510页

作者： Manjun Xiao Longfei Liu Yongdie Meng Baobing Fan Wenyan Su Conggui Jin Luocheng Liao Fan Yi Chao Xu Rui Zhang Alex K.-Y.Jen Wei Ma Qunping Fan College of Chemistry Key Laboratory of Environment-Friendly Chemistry and Application(Ministry of Education)Xiangtan UniversityXiangtan 411105China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China Department of Physics Chemistry and Biology(IFM)Linköping UniversityLinköping SE-58183Sweden State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640China Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications School of Materials Science and EngineeringChangzhou UniversityChangzhou 213164China Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education School of Materials Science and EngineeringXiangtan UniversityXiangtan 411105China School of Materials Science and Engineering Xi’an University of Science and TechnologyXi’an 710054China Department of Chemistry Institute for Clean EnergyCity University of Hong KongHong Kong 999077China

Additives play a crucial role in enhancing the photovoltaic performance of polymer solar cells(PSCs).However,the typical additives used to optimize blend morphology of PSCs are still high boiling-point solvents,while their trace residues may reduce device stability.Herein,an effective strategy of“solidification of solvent additive(SSA)”has been developed to convert additive from liquid to solid,by introducing a covalent bond into low-cost solvent diphenyl sulfide(DPS)to synthesize solid dibenzothiophene(DBT)in one-step,which achieves optimized morphology thus promoting efficiency and device stability.Owing to the fine planarity and volatilization of DBT,the DBT-processed films achieve ordered molecular crystallinity and suitable phase separation compared to the additive-free or DPS-treated ones.Importantly,the DBT-processed device also possesses improved light absorption,enhanced charge transport,and thus a champion efficiency of 17.9%is achieved in the PM6:Y6-based PSCs with an excellent additive component tolerance,reproducibility,and stability.Additionally,the DBT-processed PM6:L8-BO-based PSCs are further fabricated to study the universality of SSA strategy,offering an impressive efficiency approaching19%as one of the highest values in binary PSCs.In conclusion,this article developed a promising strategy named SSA to boost efficiency and improve stability of PSCs.

关键词： polymer solar cells solidification of solvent additives power conversion efficiency device stability

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Tandem organic solar cells with efficiency over 19% via the careful subcell design and optimization

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Science China Chemistry 2023年第3期66卷 808-815页

作者： Lingxian Meng Huazhe Liang Guangkun Song Mingpeng Li Yuzhong Huang Changzun Jiang Kai Zhang Fei Huang Zhaoyang Yao Chenxi Li Xiangjian Wan Yongsheng Chen State Key Laboratory and Institute of Elemento-Organic Chemistry Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer MaterialsCollege of ChemistryNankai UniversityTianjin 300071China State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640China

The series-connected tandem device strategy is an effective approach to promote the efficiency of organic solar cells(OSCs) with broadened absorption range and alleviated thermalization and transmission loss.In this article,two nonfullerene acceptors,FB rThCl and BTP-4Se,with complementary absorptions covering the range from 300 to 1,000 nm were designed and synthesized for the front and rear cell,respectively.The front cell based on D18:FBr-ThCl exhibited a Voc of 1.053 V with high external quantum efficiency(EQE) response values ranging from 300 to 740 nm.The rear cell with a ternary active layer PM6:BTP-4 Se:F-2F was optimized and afforded the Voc of 0.840 V and Jsc of 26.88 mA cm^(-2).Subsequently,the tandem device was constructed with a fully solution-processed interconnected layer of ZnO/PEDOT:PS S/PMA,and demonstrated a power conversion efficiency(PCE) of 19.55% with a Voc of 1.880 V,a Jsc of 13.25 mA cm^(-2) and an FF of 78.47%.

关键词： tandem device organic solar cells front cell rear cell power conversion efficiency

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