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Photodetectors based on small-molecule organic semiconductor crystals

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Chinese Physics B 2019年第3期28卷 26-39页

作者： Jing Pan Wei Deng Xiuzhen Xu Tianhao Jiang Xiujuan Zhang Jiansheng Jie Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China

Small-molecule organic semiconductor crystals(SMOSCs) combine broadband light absorption(ultraviolet–visible–near infrared) with long exciton diffusion length and high charge carrier mobility. Therefore, they are promising candidates for realizing high-performance photodetectors. Here, after a brief resume of photodetector performance parameters and operation mechanisms, we review the recent advancements in application of SMOSCs as photodetectors, including photoconductors, phototransistors, and photodiodes. More importantly, the SMOSC-based photodetectors are further categorized according to their detection regions that cover a wide range from ultraviolet to near infrared. Finally, challenges and outlooks of SMOSC-based photodetectors are provided.

关键词： small molecule organic semiconductor crystals photodetectors

Molecular opacities of low-lying states of oxygen molecule

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Chinese Physics B 2020年第2期29卷 206-212页

作者： Gui-Ying Liang Yi-Geng Peng Rui Li Yong Wu Jian-Guo Wang Institute of Applied Physics and Computational Mathematics Beijing 100088China HEDPS Center for Applied Physics and TechnologyPeking UniversityBeijing 100084China Department of Physics College of ScienceQiqihar UniversityQiqihar 161006China

The X^3Σg^-,A^'3△u,A^3Σ^u+,1^3Πg,and B^3Σu^-electronic states of oxygen molecule(O2)are calculated by the multiconfiguration self-consisted filed(MRCI)+Q method with the scalar relativistic correction and core-valence correlation *** obtained spectroscopic constants of the low-lying bound states are in excellent agreement with *** on the accurately calculated structure parameters,the opacities of the oxygen molecule at the temperatures of 1000 K,2000 K,2500 K,and 5000 K under a pressure of 100 atm(1 atm=1.01325×10^5 Pa)and the partition functions between 10 K and 10^4 K are *** is found that with the increase of temperature,the opacities for transitions in a long wavelength range are enlarged because of the larger population on excited electronic states at the higher temperatures.

关键词： oxygen molecule transition dipole moments opacities

Dependence of photoelectron-momentum distribution of H_2^+ molecule on orientation angle and laser ellipticity

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Chinese Physics B 2019年第5期28卷 75-79页

作者： Hong-Dan Zhang Si-Qi Zhang Lei Ji Qi Zhen Jing Guo Xue-Shen Liu Institute of Atomic and Molecular Physics Jilin University School of Physics and Electronic Technology Liaoning Normal University

By numerically solving the two-dimensional time-dependent Schr¨odinger equation under the frozen-nuclei approximation, we are able to study the molecular photoelectron-momentum distribution(MPMD) of H^+_2 with different orientation angles driven by elliptically polarized laser pulse with varying ellipticities. Our numerical results show that the MPMD is sensitive to the orientation angle and the laser ellipticity, which can be explained by the attosecond perturbation ionization theory and the exactly solvable photoionization model. When the ellipticity ε = 0, the final MPMD of x-oriented H^+_2 shows a distinct six-lobe pattern that is different from that with ε = 0.5 and ε = 1. The evolutions of electron wave packet(EWP)and MPMD with x-oriented H^+_2 are presented to interpret this distinct pattern.

关键词： H2^+ molecule molecular photoelectron-momentum distribution attosecond perturbation ionization theory

Dependence of the surface-assisted fullerene-based complex structure on the template molecule design

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Nano Research 2019年第7期12卷 1509-1537页

作者： Yanfang Geng Qingdao Zeng Chen Wang CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China

Fullerene derivatives as a kind of star carbon materials have received intense investigation because of their three-dimensional shape,anisotropic electron mobility,and high electron ***,the cutting-edge developments of fullerene nanomaterials have had a tremendous impact on a wide range of applications,such as organic solar cells,field effect transistors,and *** explore their full potential applications,research into fullerene-based multilevel nanostructures relying on hierarchical interactions from bottom to top is rapidly *** is of great theoretical and practical significance to prepare multilevel fullerene nanostructures with structural and properties controlled by optimizing the influencing *** review would offer several aspects including the chemical structures of organic molecules and the nanostructures of the organic molecules and fullerene-organic *** monolayers or multilayers,fullerene molecules tend to fall into a space of suitable size,in which the located positions are affected by the intermolecular *** the covered surfaces,fullerenes are more likely to approach the electron-withdrawing units through the donor-acceptor and charge transfer *** the implementation of this review,an exhaustive analysis on the chemical modification,including the molecular backbone and substituents,preformed network synergies,and adsorption sites is *** addition,the relationship between the molecules and structures that illustrates the importance of the molecular design for the controlled fullerenes hybrid nanostructures can be further understood based on the results of the joined experimental and computational investigations.

关键词： fullerene organic molecule nanostructure property molecular design

Theoretical analysis of the coupling between Feshbach states and hyperfine excited states in the creation of 23Na40K molecule

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Chinese Physics B 2020年第2期29卷 218-223页

作者： Ya-Xiong Liu Bo Zhao Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Shanghai Branch CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum PhysicsUniversity of Science and Technology of ChinaShanghai 201315China

We present an intensive study of the coupling between different Feshbach states and the hyperfine levels of the excited states in the adiabatic creation of 23Na40K ground-state *** use coupled-channel method to calculate the wave function of the Feshbach molecules,and give the short-range wave function of triplet *** energies of the hyperfine excited states and the coupling strength between the Feshbach states and the hyperfine excited states are *** results can be used to prepare a specific hyperfine level of the rovibrational ground state to study the ultracold collisions involving molecules.

关键词： Feshbach resonance stimulated Raman adiabatic passage ultracold molecule

Critical assessment of mixing thermodynamic functions of Fe-Al binary melts based on atom-molecule coexistence theory

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Journal of Iron and Steel Research International 2020年第3期27卷 266-281页

作者： Xue-min Yang Jin-yan Li Fang-jia Yan Dong-ping Duan CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Department of Metallurgy and Raw Materials China Metallurgical Industry Planning and Research InstituteBeijing 100711China

In order to further verify the accuracy and feasibility of the calculated mass action concentrations Ni of Al and Fe by the developed atom and molecule coexistence theory(AMCT)model,i.e.,AMCT-N,model,for representing activities aR,i of Al and Fe in Fe-Al binary melts reported in the first part of the serial studies,the molar mixing thermodynamic functions of Fe-Al binary melts over a temperature range from 1823 to 1973 K have been calculated based on Ni of Al and Fe as well as the effect of temperature on activity coefficients 7,of Al and Fe as■lnγj/■T=■ln(Ni/xi)/dT by the developed AMCTN-Ni model,where T is absolute temperature and.v,is the mole fraction of element i or compound i in metallic *** reported molar mixing thermodynamic functions of Fe-Al binary melts as well as the reported excess molar mixing thermodynamic functions of Fe-Al binary melts relative to ideal solution as a basis from the available literatures have been critically assessed and applied as criteria to verify the developed AMCT-Al,*** effect of changing temperature onγi of Al and Fe,i.e.,activity coefficient gradients■lnγAl/■T and■lnγFe/■T,which are two indispensable parameters to calculate the molar mixing thermodynamic functions of Fe-Al binary melts,can be accurately obtained by the developed AMCT-Ni,model and expressed by the cubic polynomial *** only the partial molar mixing thermodynamic functions of Al and Fe in Fe-Al binary melts but also the integral molar mixing thermodynamic functions of Fe-Al binary melts can be accurately calculated by the developed AMCT-Al,***,the excess partial and integral molar mixing thermodynamic functions of Fe-Al binary melts relative to ideal solution as a basis can also be precisely calculated by the developed AMCT-Ni,model.

关键词： Thermodynamic assessment Fe-Al binary melt Molar mixing thermodynamic function Excess molar mixing thermodynamic function Activity Atom and molecule coexistence theory

Strain distribution and electronic structures of the InAs/GaAs quantum ring molecule in an applied electric field

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Science China(Physics,Mechanics & Astronomy) 2010年第9期53卷 1594-1599页

作者： JIA BoYong,YU ZhongYuan,LIU YuMin,YAO WenJie,YE Han & FENG Hao Key Laboratory of Information Photonics and Optical Communications(Beijing University of Posts and Telecommunications),Ministry of Education,Beijing 100876,China Ministry of Education Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications) Beijing China

The strain distribution and electronic structures of the InAs/GaAs quantum ring molecule are calculated via the finite element *** our model,three identical InAs quantum rings are aligned vertically and embedded in the cubic GaAs *** the band edge modification induced by the strain,the electronic ground state and the dependence of ground state energy on geometric parameters of the quantum ring molecule are *** change of localization of the wavefunction resulting from the applied electric field along the growth direction is *** ground state energy decreases as the electric field intensity increases in a parabolic-like *** electric field changes the monotonic dependence of the energy level on the inter-ring distance into a non-monotonic ***,the electric field has no effect on the relationships between the energy level and other geometric parameters such as the inner radius and outer radius.

关键词： strain distribution electronic structure quantum ring molecule applied electric field

Altered expression of stromal interaction molecule(STIM)-calcium release-activated calcium channel protein(ORAI) and inositol1,4,5-trisphosphate receptors(IP_3Rs)in cancer:will they become a new battlefield for oncotherapy?

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Chinese Journal of Cancer 2016年第5期35卷 214-222页

作者： Jing Wen Ying-Cheng Huang Huan-Huan Xiu Zhi-Ming Shan Kang-Qing Xu Department of Anesthesiology The First Affiliated HospitalSun Yat-sen University Zhongshan School of Medicine Sun Yat-sen University

The stromal interaction molecule(STIM)-calcium release-activated calcium channel protein(ORAI) and inositol1,4,5-trisphosphate receptors(IP_3Rs) play pivotal roles in the modulation of Ca^(2+)-regulated pathways from gene transcription to cell apoptosis by driving calcium-dependent signaling *** evidence has implicated the dysregulation of STIM-ORAI and IP_3Rs in tumorigenesis and tumor *** controlling the activities,structure,and/or expression levels of these Ca^(2+)-transporting proteins,malignant cancer cells can hijack them to drive essential biological functions for tumor ***,the molecular mechanisms underlying the participation of STIM-ORAI and IP_3Rs in the biological behavior of cancer remain *** this review,we summarize recent advances regarding STIM-ORAI and IP_3Rs and discuss how they promote cell proliferation,apoptosis evasion,and cell migration through temporal and spatial rearrangements in certain types of malignant *** understanding of the essential roles of STIM-ORAI and IP_3Rs may provide new pharmacologic targets that achieve a better therapeutic effect by inhibiting their actions in key intracellular signaling pathways.

关键词： Stromal interaction molecule (STIM), Calcium release-activated calcium channel protein (ORAI),Inositol 1,4,5-trisphosphate receptors (IP3Rs), Ca2+, Tumorigenesis

molecule modification and mass deposition induced by the implantation of low energy Fe^+ ion beams into amino acids

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Chinese Science Bulletin 2002年第8期47卷 672-676页

作者： YUAN Shibin WEI Zengquan GAO Qingxiang Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China College of Bio-Sciences Lanzhou UniversityLanzhou 730000China

Fe+ ion beams with the energy of 110 keV were implanted into films of L(+)-cysteine (HSCH2CH(NH2)COOH). One of the single crystals grown in hydrochloric acid solution with the implanted samples through slow evaporation was structurally characterized by the X-ray crystallography. The crystal is monoclinic, space group C2, with a = 1.8534(4) nm, b=0.5234(1) nm, c = 0.7212(1) nm, β=103.722°, V = 0.67965(3) nm3, Z = 4, F(000) = 144.0, Dclac = 1.763 g·cm-3, μ (MoKa) = 1.06 mm-1, T = 293(2) K.R = 0.0379, wR = 0.0835 for 660 observed reflections (I>2σ(I)). The structural formula of the crystal compound is (CH2CH(NH2)NO2)ClFe (Mr = 180.38u). Products of heavy ion beam irradiation were purified and it was directly confirmed that the implanted Fe+ ions had been deposited in the novel molecules. The same doses of Fe+ ion beams of the same energy were implanted into films of L(+)-cysteine hydrochloride monohydrate. FTIR spectroscopy of the implanted samples proved that some of the original molecules were

关键词： L(+)-cysteine low energy Fe+ ion beams mass deposition molecule modification single crystal the X-ray diffraction infrared spectroscopy.