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Review and perspective of materials for flexible solar cells

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Materials Reports(Energy) 2021年第1期1卷 45-68页

作者： Xiaoyue Li Peicheng Li Zhongbin Wu Deying Luo Hong-Yu Yu Zheng-Hong Lu Department of Physics Center for Optoelectronics Engineering ResearchYunnan UniversityKunming650091PR China Department of Materials Science and Engineering University of TorontoTorontoOntarioM5G 3E4Canada School of Microelectronics Southern University of Science and TechnologyShenzhen518055PR China

Thin-film flexible solar cells are lightweight and mechanically *** with rapidly advancing battery technology,flexible solar panels are expected to create niche products that require lightweight,mechanical flexibility,and moldability into complex shapes,such as roof-panel for electric automobiles,foldable umbrellas,camping tents,*** this paper,we provide a comprehensive assessment of relevant materials suitable for making flexible solar *** materials reviewed include metals,ceramics,glasses,and *** active materials,we focus primarily on emerging new semiconductors including small organic donor/acceptor molecules,conjugated donor/acceptor polymers,and organometal halide *** electrode materials,transparent conducting oxides,thin metal films/nanowires,nanocarbons,and conducting polymers are *** also discuss the merits,weaknesses,and future perspectives of these materials for developing next-generation flexible photovoltaics.

关键词： Flexible solar cells Substrates Electrodes organic semiconductors Polymers Perovskites Silicon

organic Electronics, a Promising King of Freedom to Change Future Life Style of Human Being

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Chinese Journal of Chemistry 2015年第8期33卷 803-805页

作者： Wei Huang[*] Linghai Xie[*] Key Laboratory for organic Electronics & Information Displays (KLOEID) Institute of Advanced Materials (IAM) Nanjing University of Posts & Telecommunications (NUPT) 9 Wenyuan Road Nanjing 210023 China

organic electronics is a fast-moving and inter- disciplinary research field beyond organic chemistry. In this area, two major research objects are organic semiconductors and their film devices. Device struc- tures are generally categorized into two types of archi- tecture; one is two-terminal devices such as diodes, and the other is three-terminal devices, such as transistors.

关键词： organic chemistry organic electronics organic semiconductors

Unraveling the Effect of Stacking Configurations on Charge Transfer in WS_(2) and organic Semiconductor Heterojunctions

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Precision Chemistry 2023年第7期1卷 443-451页

作者： Shuchen Zhang Dewei Sun Jiaonan Sun Ke Ma Zitang Wei Jee Yung Park Aidan H.Coffey Chenhui Zhu Letian Dou Libai Huang Davidson School of Chemical Engineering Purdue UniversityWest LafayetteIndiana 47907United States Advanced Light Source Lawrence Berkeley National LaboratoryBerkeleyCalifornia 94720United States Department of Chemistry Purdue UniversityWest LafayetteIndiana 47907United States

Photoinduced interfacial charge transfer plays a critical role in energy conversion involving van der Waals(vdW)heterostructures constructed of inorganic nanostructures and organic ***,the effect of molecular stacking configurations on charge transfer dynamics is less *** this study,we demonstrated the tunability of interfacial charge separation in a type-Ⅱ heterojunction between monolayer(ML)WS_(2) and an organic semiconducting molecule[2-(3″′,4′-dimethyl-[2,2′:5′,2′:5″,2″′-quaterthiophen]-5-yl)ethan-1-ammonium halide(4Tm)]by rational design of relative stacking *** assembly between ML-WS_(2) and the 4Tm molecule forms a face-to-face stacking when 4Tm molecules are in a selfaggregation *** contrast,a face-to-edge stacking is observed when 4Tm molecule is incorporated into a 2D organic-inorganic hybrid perovskite *** face-to-face stacking was proved to be more favorable for hole transfer from WS_(2) to 4Tm and led to interlayer excitons(IEs)*** absorption measurements show that the hole transfer occurs on a time scale of 150 *** the other hand,the face-to-edge stacking resulted in much slower hole transfer without formation of *** inefficient hole transfer occurs on a similar time scale as A exciton recombination in WS_(2),leading to the formation of negative *** investigations offer important fundamental insights into the charge transfer processes at organic−inorganic interfaces.

关键词： Charge transfer two-dimensional materials organic semiconductors heterojunction stacking configuration interlayer exciton

Grain boundary engineering of organic semiconductor films in organic transistors

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Aggregate 2023年第6期4卷 27-43页

作者： Yanpeng Wang Shougang Sun Yinan Huang Yao Fu Jiannan Qi Kai Tie Zhongwu Wang Fei Jiao Rongmei Si Xiaosong Chen Liqiang Li Wenping Hu Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistryInstitute of Molecular Aggregation ScienceSchool of ScienceTanjin UniversityTanjinChina Haihe Laboratory of Sustainable Chemical Transformations TianjinChina Department of Materials Science and Engineering.Tianjin College University of Science and Technology BeijingTinjinChina Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhouChina

organicﬁeld-effect transistors(OFETs)show great application potential in organic electronic and optoelectronicﬁelds due to their excellent mechanicalﬂexibility,low cost,and solution ***,grain boundaries(GBs)disrupt the aggrega-tion state of organic semiconductor(OSC)ﬁlms and hinder electrical performance and stability,which limits the application of ***,the sensitive nature of GBs is widely used in sensing,but detailed descriptions of the GBs are *** review aims toﬁll this knowledge *** role of GBs and their effect on the per-formance and stability of OFETs are analyzed,followed by a detailed summary of the characterization of ***,strategies for suppressing the negative effects of GBs and utilizing the sensitive nature of GBs for application are ***,potential research directions for GBs in OFETs are discussed.

关键词： aggregation states electrical performance grain boundaries organic field-effect transistors organic semiconductors stability

Conjugated dendritic oligothiophenes for solution-processed bulk heterojunction solar cells

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Frontiers of Optoelectronics 2011年第1期4卷 12-23页

作者： Chang-Qi MA Institute of organic Chemistry II and Advanced Materials Ulm University

This mini-review summarizes the recent achievements of developing conjugated dendritic oligothiophenes(DOT) for use in solution-processed bulk heterojunction(BHJ) solar cells. These DOTs are structurally defined molecules with relatively high molecular weight. Therefore, this novel class of thiophene based material possesses not only some advantages of oligomers,such as defined and monodispersed molecular structure,high chemical purity, but also some characteristics of polymers, for example, good *** addition, the step-by-step approach of its synthesis allows precise functionalization of dendritic backbones with desired moieties, which is helpful to finely tune the optical and electronic properties of materials. Power conversion efficiencies(PCE) of BHJ solar cells were achieved up to 2.5% when functionalized thiophene dendrimers were used as electron donor and electron acceptor was a fullerene derivative. These results indicated that dendritic oligothiophenes are a novel class of the materials of electron donor for solution-processed organic solar cells.

关键词： conjugated dendrimers dendritic oligothiophenes (DOT) organic semiconductors bulk heterojunction (BHJ) solar cells

Recent Advances in Molecular Design of organic Thermoelectric Materials

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CCS Chemistry 2021年第10期3卷 2212-2225页

作者： Dongyang Wang Liyao Liu Xike Gao Chong-an Di Daoben Zhu Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190 School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049 Key Laboratory of Synthetic and Self-Assembly Chemistry for organic Functional Molecules Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032

organic thermoelectric(OTE)materials have gained widespread attention because of their potential for wearable power generators and solid cooling ***,the development of state-ofthe-art OTE materials still suffers from limited molecular categories because of the rarity ofmolecular design strategies,which limits further development of this emerging ***,many efforts have been devoted to developing molecular design concepts for high performance OTE materials.

关键词： organic thermoelectric material structure-property relationship conjugated backbone side chain organic semiconductors

Alternating current characterization of nano-Pt(Ⅱ)octaethylporphyrin(PtOEP) thin film as a new organic semiconductor

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Chinese Physics B 2016年第6期25卷 426-432页

作者： M Dongol M M El-Nahass A El-Denglawey A A Abuelwafa T Soga Nano and Thin Film Laboratory Physics DepartmentFaculty of ScienceSouth Valley University Physics Department Faculty of EducationAin Shams University Physics Department Faculty of Applied Medical ScienceTaif University Department of Frontier Materials Nagoya Institute of Technology

Alternating current（AC） conductivity and dielectric properties of thermally evaporated Au/Pt OEP/Au thin films are investigated each as a function of temperature（303 K–473 K） and frequency（50 Hz–5 MHz）.The frequency dependence of AC conductivity follows the Jonscher universal dynamic *** AC-activation energies are determined at different *** is found that the correlated barrier hopping（CBH） model is the dominant conduction *** variation of the frequency exponent s with temperature is analyzed in terms of the CBH *** barrier height Wm,hopping distance Rω,and the density of localized states N（EF） are valued at different *** constant ε1（ω,T） and dielectric loss ε2（ω,T） are discussed in terms of the dielectric polarization *** dielectric modulus shows the non-Debye relaxation in the *** extracted relaxation time by using the imaginary part of modulus（M’’）is found to follow the Arrhenius law.

关键词： PtOEP thin films AC conductivity dielectric constants organic semiconductors solar cell nano materials

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Dye-sensitized perovskite/organic semiconductor ternary transistors for artificial synapses

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Science China Materials 2022年第9期65卷 2521-2528页

作者： Xin Wang Dandan Hao Jia Huang School of Materials Science and Engineering Interdisciplinary Materials Research CenterFrontiers Science Center for Intelligent Autonomous SystemsTongji UniversityShanghai 201804China Translational Research Institute of Brain and Brain-Like Intelligence Shanghai Fourth People’s Hospital Affiliated to Tongji UniversitySchool of Materials Science and EngineeringTongji UniversityShanghai 200434China

Artificial intelligence(AI)is attractive due to its brain-like working pattern and efficient task ***-stimulated synaptic devices show enormous potential in the field of neuromorphic ***,we develop a kind of optical synaptic devices with a ternary photoactive material system consisting of organometal halide perovskite CHNH-PbBr,organic dye Rhodamine B(RhB),and organic semiconductor *** found that the introduction of RhB can significantly improve the light absorption and photoresponsivity of the composite *** devices exhibit acceptable synaptic behaviors and realize a brain-like learning pattern toward various input ***,the devices can respond to light signals with a low intensity of 1.1μW cm^(-2)and be operated at low working *** devices achieve a low energy consumption of 1.25 fJ at a drain-source voltage of-50μV,comparable to that of a biological synaptic ***,the devices simulate a self-learning process,indicating their significantly improved learning ***,the devices can recognize subtle differences in Morse codes,showing potential in the practical application of information *** excellent optoelectronic performance demonstrates that the proposed ternary synaptic devices are advantageous in developing new AI.

关键词： perovskites Rhodamine B organic semiconductors synapses artificial intelligence

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Remove the water-induced traps toward improved performance in organic solar cells

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Science China Materials 2021年第11期64卷 2629-2644页

作者： Mumin Shi Tao Wang Rui Sun Qiang Wu Dandan Pei Hui Wang Wenyan Yang Wei Wang Yao Wu Guohua Xie Tao Wang Long Ye Jie Min The Institute for Advanced Studies Wuhan UniversityWuhan 430072China School of Materials Science and EngineeringTianjin UniversityTianjin 300072China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Lab on organic and Polymeric Optoelectronic Materials Department of ChemistryWuhan UniversityWuhan 430072China Beijing National Laboratory for Molecular Sciences Beijing 100190China Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou 450002China

Clusters of water molecules have low ionization energies because of stabilization of charge from the dipole moment of surrounding molecules,and thus can form potential traps resulting in the undesirable photovoltaic performance in organic solar cells(OSCs).Herein,we demonstrated a solvent-water evaporation(SWE)strategy,which can effectively remove the water-induced traps that are omnipresent in photoactive layers,leading to a significant improvement in device performance.A higher power conversion efficiency of 17.10%and a better device photostability are achieved by using this SWE method,as compared with the untreated binary PM6:Y6 system(15.83%).We highlight the water-related traps as a limiting factor for carrier transport and extraction properties,and further reveal the good universality of the SWE strategy applied into *** addition,organic light-emitting diodes and organic field-effect transistors are investigated to demonstrate the applicability of this SWE *** strategy presents a major step forward for advancing the field of organic electronics.

关键词： non-fullerene acceptor water-induced traps charge transport device stability organic semiconductors

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