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1.
Ming Liu Pu Fan Qin Hu Thomas P. Russell Yao Liu 《Angewandte Chemie (International ed. in English)》2020,59(41):18131-18135
Self‐doping ionene polymers were efficiently synthesized by reacting functional naphthalene diimide (NDI) with 1,3‐dibromopropane ( NDI‐NI ) or trans‐1,4‐dibromo‐2‐butene ( NDI‐CI ) via quaternization polymerization. These NDI‐based ionene polymers are universal interlayers with random molecular orientation, boosting the efficiencies of fullerene‐based, non‐fullerene‐based, and ternary organic solar cells (OSCs) over a wide range of interlayer thicknesses, with a maximum efficiency of 16.9 %. NDI‐NI showed a higher interfacial dipole (Δ), conductivity, and electron mobility than NDI‐CI , affording solar cells with higher efficiencies. These polymers proved to efficiently lower the work function (WF) of air‐stable metals and optimize the contact between metal electrode and organic semiconductor, highlighting their power to overcome energy barriers of electron injection and extraction processes for efficient organic electronics. 相似文献
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有机太阳能电池(OSC)为典型的三明治结构,是以共轭类有机化合物为活性层材料将太阳光转换为电能,通过两个电极输出电流。这些有机物具有来源广、质量轻和可再生等优点,使得有机太阳能电池在清洁新能源领域备受关注。当前研究的焦点仍然是提高电池的光电转换效率,主要通过改善活性层材料、优化器件结构和界面修饰等途径。本文重点介绍了作者课题组在界面工程方面所做的代表性工作,通过引入含磺酸基团或羧酸基团的超支化结构的聚合物阴极修饰层材料,获得了高效的OSCs;合成了新颖的非共轭有机小分子电解质修饰层,制备了高达10.02%效率的单结正型OSCs。此外,还研究了简单的极性溶剂处理,如甲醇能够优化活性层形貌,提高电池器件的性能。 相似文献
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Dr. Xiaopeng Xu Prof. Qiang Peng 《Chemistry (Weinheim an der Bergstrasse, Germany)》2022,28(25):e202104453
Nonfullerene acceptor based organic solar cells (NF-OSCs) have witnessed rapid progress over the past few years owing to the intensive research efforts on novel electron donor and nonfullerene acceptor (NFA) materials, interfacial engineering, and device processing techniques. Interfacial layers including electron transporting layers (ETL) and hole transporting layers (HTLs) are crucially important in the OSCs for facilitating electron and hole extraction from the photoactive blend to the respective electrodes. In this review, the lates progress in both ETLs and HTLs for the currently prevailing NF-OSCs are discussed, in which the ETLs are summarized from the categories of metal oxides, metal chelates, non-conjugated electrolytes and conjugated electrolytes, and the HTLs are summarized from the categories of inorganic and organic materials. In addition, some bifunctional interlayer materials served as both ETLs and HTLs are also introduced. Finally, the prospects of ETL/HTL materials for NF-OSCs are provided. 相似文献
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Combining Fullerenes and Zwitterions in Non‐Conjugated Polymer Interlayers to Raise Solar Cell Efficiency 下载免费PDF全文
Dr. Yao Liu Dr. Madhu Sheri Marcus D. Cole Prof. Todd Emrick Prof. Thomas P. Russell 《Angewandte Chemie (International ed. in English)》2018,57(31):9675-9678
Polymer zwitterions were synthesized by nucleophilic ring‐opening of 3,3′‐(but‐2‐ene‐1,4‐diyl)bis(1,2‐oxathiolane 2,2‐dioxide) (a bis‐sultone) with functional perylene diimide (PDI) or fullerene monomers. Integration of these polymers into solar cell devices as cathode interlayers boosted efficiencies of fullerene‐based organic photovoltaics (OPVs) from 2.75 % to 10.74 %, and of non‐fullerene‐based OPVs from 4.25 % to 10.10 %, demonstrating the versatility of these interlayer materials in OPVs. The fullerene‐containing polymer zwitterion ( C60‐PZ ) showed a higher interfacial dipole (Δ) value and electron mobility than its PDI counterpart ( PDI‐PZ ), affording solar cells with high efficiency. The power of PDI‐PZ and C60‐PZ to improve electron injection and extraction processes when positioned between metal electrodes and organic semiconductors highlights their promise to overcome energy barriers at the hard‐soft materials interface of organic electronics. 相似文献
6.
Yingjian Yu Dr. Bin Meng Prof. Dr. Frieder Jäkle Prof. Jun Liu Prof. Lixiang Wang 《Chemistry (Weinheim an der Bergstrasse, Germany)》2020,26(4):873-880
Triarylboranes that exhibit p–π* conjugation serve as versatile building blocks to design n-type organic/polymer semiconductors. A series of new molecular acceptors based on triarylborane is reported here. These molecules are designed with a boron atom that bears a bulky 2,4,6-tri-tert-butylphenyl (Mes*) substituent at the core and strong electron-withdrawing 2-(3-oxo-2,3-dihydroinden-1-ylidene)malononitrile (IC) units as the end-capping groups that are linked to the core by bithiophene bridges. Butyl or butoxy groups are introduced to the bithiophene units to tune the optoelectronic properties. These molecules show nearly planar backbones with highly localized steric hindrance at the core, low LUMO/HOMO energy levels, and broad absorption bands spanning the visible region, which are all very desirable characteristics for use as electron acceptors in organic solar cell (OSC) applications. The attachment of butyl groups to the bithiophene bridges brings about a slightly twisted backbone, which in turn promotes good solubility and homogeneous donor/acceptor blend morphology, whereas the introduction of butoxy groups leads to improved planarity, favorable stacking in the film state, and a greatly reduced band gap. OSC devices based on these molecules exhibit encouraging photovoltaic performances with power conversion efficiencies reaching up to 4.07 %. These results further substantiate the strong potential of triarylboranes as the core unit of small molecule acceptors for OSC applications. 相似文献
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Zuhao You Yanan Song Wenxu Liu Wenlong Wang Chenghao Zhu Yuxin Duan Yao Liu 《Angewandte Chemie (International ed. in English)》2023,62(23):e202302538
Electroactive ionenes combining caged-shaped diazabicyclic cations and aromatic diimides were developed as interlayers in organic solar cells (OSCs). These ionenes reduce the work-function of air-stable metal electrodes (e.g., Ag, Cu and Au) by generating strong interfacial dipoles, and their optoelectronic and morphological characters can be modulated by aromatic diimides, leading to high conductivity and good compatibility with active layers. The optimal ionene exhibits superior charge-transport, desirable crystallinity, and weak visible-absorption, boosting the efficiency of benchmark PM6 : Y6-based OSCs up to 17.44 %. The corresponding normal devices show excellent stability at maximum power point test under one sun illumination for 1000 h. Replacing Y6 with L8-BO promotes the efficiency to 18.43 %, one of the highest in binary OSCs. Notably, high efficiencies >16 % are maintained as the interlayer thickness increasing to 105 nm, the best result with interlayer-thickness over 100 nm. 相似文献
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Organic solar cells have made rapid progress in the last two decades due to the innovation of conjugated materials and photovoltaic devices. Microphase separation that connects with materials and devices plays a crucial role in the charge generation process. In this account, we summary our recent works of developing new crystalline conjugated polymers to control the microphase separation in thin films in order to realize high performance in solar cells, including crystalline diketopyrrolopyrrole‐based donor polymers, perylene bisimide‐based electron acceptors, and “double‐cable” conjugated polymers that contain covalently‐linked crystalline donor and acceptor in one material for single‐component organic solar cells. 相似文献
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Niansheng Xu Yang Li Ruihan Wu Rui Zhu Prof. Jidong Zhang Dr. Shaik M. Zakeeruddin Prof. Hanying Li Prof. Ze-Sheng Li Prof. Michael Grätzel Prof. Peng Wang 《Chemistry (Weinheim an der Bergstrasse, Germany)》2019,25(4):945-948
Modulating the structure and property of hole-transporting organic semiconductors is of paramount importance for high-efficiency and stable perovskite solar cells (PSCs). This work reports a low-cost peri-xanthenoxanthene based small-molecule P1, which is prepared at a total yield of 82 % using a three-step synthetic route from the low-cost starting material 2-naphthol. P1 molecules stack in one-dimensional columnar arrangement characteristic of strong intermolecular π–π interactions, contributing to the formation of a solution-processed, semicrystalline thin-film exhibiting one order of magnitude higher hole mobility than the amorphous one based on the state-of-the art hole-transporter, 2,2-7,7-tetrakis(N,N′-di-paramethoxy-phenylamine 9,9′-spirobifluorene (spiro-OMeTAD). PSCs employing P1 as the hole-transporting layer attain a high efficiency of 19.8 % at the standard AM 1.5 G conditions, and good long-term stability under continuous full sunlight exposure at 40 °C. 相似文献
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Shanci Chen Changquan Tang Zhigang Yin Yunlong Ma Dongdong Cai Dhanavel Ganeshan Qingdong Zheng 《中国化学》2013,(11):1409-1417
A ladder-type diindenopyrazine (IPY) was synthesized and used as a building block for constructing conjugated copolymers. Three copolymers based on the IPY moiety were obtained via the Suzuki coupling reaction with dif- ferent monomers, including 4,7-dithien-2-yl-2,1,3-benzothiadiazole (DBT), 5,8-dithien-2-yl-2,3-diphenylquinoxa- line (DTQ), and 5,8-dithien-2-yl-2,3-di(4-fluorophenyl)quinoxaline (DFTQ). The obtained polymers were charac- terized by 1H NMR spectroscopy, UV-Vis absorption spectroscopy, cyclic voltammetry, and gel permeation chro- matography (GPC). Owing to the four solubilizing alkyl chains on the IPY unit, all the three copolymers have good solubility in common solvents. These polymers have deep-lying HOMO energy levels in the range of-5.55-5.60 eV, and exhibit field-effect mobilities as high as 0.006 cm2.V-l.s i. Photovoltaic applications of these polymers as light-harvesting and hole-conducting materials were investigated in conjunction with [6,6]-phenyl-C6rbutyric acid methyl ester (PC61BM). Both conventional and inverted devices were fabricated based on these three polymers. A power conversion efficiency (PCE) of 2.53% and a high open-circuit voltage of 1.00 V were obtained under simu- lated solar light AM 1.5 G (100 mW/cm2) from an inverted solar cell with an active layer containing 25 wt% lad- der-type IPY containing copolymer (PIPYDTQ) and 75 wt% PC61BM. Moreover, a high open-circuit voltage of 1.02 V and a PCE of 2.40% were achieved from a conventional solar cell based on PIPYDTQ. 相似文献
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有机太阳能电池因具有成本低、质轻、柔韧性好、可大面积印刷制备等优势,引起了人们极大的关注并成为现阶段有机电子学研究的重要热点之一。有机功能层中电子给体和受体界面特性对电池的功率转换效率影响很大,通过给受体界面的微纳结构化,可扩大给受体的接触面积、缩短给体和受体的距离、增强光吸收,能产生更多激子并促进激子有效分离,从而有效提高器件的电池效率。本文综述了纳米压印、自组装、溶剂挥发以及模板法等调控微纳结构的技术和方法,总结了基于微纳结构构建有机光伏器件的发展现状,并对目前微纳结构化方法和光伏应用中存在问题和研究重点做了简要评述,最后展望了该研究领域下一步的发展方向和应用前景。 相似文献
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Aleksandra N. Mikheeva Ilya E. Kuznetsov Marina M. Tepliakova Aly Elakshar Mikhail V. Gapanovich Yuri G. Gladush Evgenia O. Perepelitsina Maxim E. Sideltsev Azaliia F. Akhkiamova Alexey A. Piryazev Albert G. Nasibulin Alexander V. Akkuratov 《Molecules (Basel, Switzerland)》2022,27(23)
Donor-acceptor conjugated polymers are considered advanced semiconductor materials for the development of thin-film electronics. One of the most attractive families of polymeric semiconductors in terms of photovoltaic applications are benzodithiophene-based polymers owing to their highly tunable electronic and physicochemical properties, and readily scalable production. In this work, we report the synthesis of three novel push–pull benzodithiophene-based polymers with different side chains and their investigation as hole transport materials (HTM) in perovskite solar cells (PSCs). It is shown that polymer P3 that contains triisopropylsilyl side groups exhibits better film-forming ability that, along with high hole mobilities, results in increased characteristics of PSCs. Encouraging a power conversion efficiency (PCE) of 17.4% was achieved for P3-based PSCs that outperformed the efficiency of devices based on P1, P2, and benchmark PTAA polymer. These findings feature the great potential of benzodithiophene-based conjugated polymers as dopant-free HTMs for the fabrication of efficient perovskite solar cells. 相似文献
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In 2018, several major breakthroughs have been achieved in organic solar cells (OSCs) with the record power conversion efficiency (PCE) reaching over 17 %. With this increased efficiency, it is time to take a step forward to consider how to convert this technology into large scale production. For this, the economic and environmental profile of OSCs should be taken seriously‐simplified synthetic routes and green chemistry methods should be applied. According to previous studies, OSCs are competitive and profitable in the commercial market. However, toxic and/or hazardous chemicals are currently used in materials synthesis and device fabrication of OSCs. In this account, we will talk about contributions and efforts we have made to minimize the economic and environmental disadvantages in the production of OSCs. We will start with the background on how our projects were conceived and will specifically discuss our work on direct arylation and green solvent. Developments of direct arylation for synthesizing conjugated polymers will be illustrated along with our recent finding regarding the effect of green solvents on device performance and stability. 相似文献
16.
Holger Hintz Heiko Peisert Dr. Umut Aygül Florian Latteyer Indro Biswas Peter Nagel Dr. Michael Merz Dr. Stefan Schuppler Dr. Dietrich Breusov Sybille Allard Dr. Ullrich Scherf Prof. Thomas Chassé Prof. 《Chemphyschem》2010,11(1):269-275
We study the electronic structure of 4,7‐bis(5‐methylthiophen‐2‐yl)benzo[c][1,2,5]thiadiazole (MTBT) and its interface properties with gold using X‐ray photoemission spectroscopy (XPS), valence‐band ultraviolet photoemission spectroscopy (UPS), X‐ray absorption spectroscopy (XAS), as well as resonant photoemission (ResPES). MTBT can be regarded as a model molecule for PCPDTBT, a promising candidate for efficient bulk heterojunction solar cells. Almost no contribution of sulfur and only a weak contribution of nitrogen to the HOMO level is found. At the interface with gold, a strong chemical interaction between the sulfur of the benzothiadiazole and gold occurs, which may have consequences for interface properties in devices. 相似文献
17.
综述了以p-型共轭聚合物为给体、n-型有机半导体为受体的非富勒烯聚合物太阳电池光伏材料最新研究进展,包括n-型共轭聚合物和可溶液加工小分子n-型有机半导体(n-OS)受体光伏材料,以及与之匹配的p-型共轭聚合物给体光伏材料.介绍的n-型共轭聚合物受体光伏材料包括基于苝酰亚胺(BDI)、萘酰亚胺(NDI)以及新型硼氮键连受体单元的D-A共聚物受体光伏材料,目前基于聚合物给体(J51)和聚合物受体(N2200)的全聚合物太阳电池的能量转换效率最高达到8.26%.n-OS小分子受体光伏材料包括基于BDI和NDI单元的有机分子、基于稠环中心给体单元的A-D-A型窄带隙有机小分子受体材料等.给体光伏材料包括基于齐聚噻吩和苯并二噻吩(BDT)给体单元的D-A共聚物,重点介绍与窄带隙A-D-A结构小分子受体吸收互补的、基于噻吩取代BDT单元的中间带隙二维共轭聚合物给体光伏材料.使用中间带隙的p-型共轭聚合物为给体、窄带隙A-D-A结构有机小分子为受体的非富勒烯聚合物太阳电池能量转换效率已经突破12%,展示了光明的前景.最后对非富勒烯聚合物太阳电池将来的发展进行了展望. 相似文献
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Linqing Qin Xingzheng Liu Xin Zhang Jianwei Yu Lei Yang Fenggui Zhao Miaofei Huang Kangwei Wang Xiaoxi Wu Yuhao Li Hao Chen Dr. Kai Wang Prof. Jianlong Xia Dr. Prof. Xinhui Lu Prof. Feng Gao Prof. Yuanping Yi Prof. Hui Huang 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2020,132(35):15153-15159
Triplet acceptors have been developed to construct high-performance organic solar cells (OSCs) as the long lifetime and diffusion range of triplet excitons may dissociate into free charges instead of net recombination when the energy levels of the lowest triplet state (T1) are close to those of charge-transfer states (3CT). The current triplet acceptors were designed by introducing heavy atoms to enhance the intersystem crossing, limiting their applications. Herein, two twisted acceptors without heavy atoms, analogues of Y6, constructed with large π-conjugated core and D-A structure, were confirmed to be triplet materials, leading to high-performance OSCs. The mechanism of triplet excitons were investigated to show that the twisted and D-A structures result in large spin–orbit coupling (SOC) and small energy gap between the singlet and triplet states, and thus efficient intersystem crossing. Moreover, the energy level of T1 is close to 3CT, facilitating the split of triplet exciton to free charges. 相似文献
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在全溶液低温制备高效、稳定有机光伏器件过程中,合理选择制备器件界面修饰材料的方法至关重要,它已成为近期有机光伏领域的重点研究内容之一。合理的界面材料能降低界面的势垒高度,减少器件的串联电阻。溶液法制备三氧化钼(MoO3)阳极界面缓冲层能有效地改善有机太阳电池阳极界面收集和载流子传输的效率,从而提高太阳电池能量转换效率,同时也提高太阳电池的稳定性。本文综述了近年来溶液法制备有机太阳电池阳极界面修饰层MoO3的研究进展,介绍了阳极界面修饰层MoO3的各种制备方法与原理,阐述了基于溶液法制备界面修饰层MoO3薄膜的研究现状与存在问题,以期为全溶液法制备高效稳定有机太阳电池的研究提供有价值的参考。 相似文献
20.
Wei Song Wang Li Ruixiang Peng Billy Fanady Jiaming Huang Wenqing Zhu Lingchao Xie Tao Lei Ziyi Ge 《化学:亚洲杂志》2019,14(9):1472-1476
Development of low‐cost water‐/alcohol‐soluble interfacial materials is a crucial issue to promote the commercialization of polymer solar cells (PSCs). Herein, two derivatives of low‐cost rhodamine, called sulforhodamine 101 (SR101) and sulforhodamine B (SRB), are applied as cathode interfacial layers (CILs) to effectively improve the charge‐carrier transportation and collection, reduce the work function (WF) of Al counter electrode, and decrease the series resistance and charge recombination in the PSCs. As a result, SR101‐based devices show excellent performance with the highest power conversion efficiency (PCE) of 9.10 %, superior to that of both the control devices with MeOH/Al and Ca/Al. Notably, sulforhodamine is commercially available with low cost and great solution‐processability. This work demonstrates that sulforhodamine has a great potential as a CIL material,which is suitable for the large‐area fabrication process and commercialization of highly efficient PSCs. 相似文献