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  • AIP Publishing  (6)
  • 1
    Online Resource
    Online Resource
    Scaling of dynamic bending response of metal tube under impact loading considering strain rate effects
    AIP Publishing ; 2020
    In:  AIP Advances Vol. 10, No. 12 ( 2020-12-01)
    Details
    In: AIP Advances, AIP Publishing, Vol. 10, No. 12 ( 2020-12-01)
    Abstract: Based on the engineering background of the heavy drop impacting metal tube, the scaling law without considering the strain rate effects was deduced according to the π theorem. Then, the scaling law considering the strain rate effects by modifying the initial velocity was derived. Finally, two scaling laws are compared by experiments and numerical simulation. The following conclusions are drawn: the scaling law without considering the strain rate effects is completely self-contained. However, if the strain rate effects are taken into account, the scaling law will be distorted. The scaling law for modifying the initial velocity can make the model test more accurately reflect the prototype test. The model test guided by the modified scaling law fits better with the prototype in terms of pipeline deformation, effective strain, effective stress, and particle vibration velocity, and the error is reduced by more than 50%.
    Type of Medium: Online Resource
    ISSN: 2158-3226
    URL: Article
    DOI: 10.1063/5.0031402
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 2583909-3
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  • 2
    Online Resource
    Online Resource
    Enhanced performance for polymer/fullerene solar cells by using bromobenzene/1,8-diiodooctane co-solvent
    AIP Publishing ; 2014
    In:  Applied Physics Letters Vol. 104, No. 21 ( 2014-05-26)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 104, No. 21 ( 2014-05-26)
    Abstract: Bromobenzene and iodobenzene with/without additive 1,8-diiodooctane were investigated as the alternative solvents for the widely used chlorobenzene/1,8-diiodooctane in polymer/fullerene solar cells. The P3HT/[6,6]-phenylC61-butyric acid methyl ester devices using bromobenzene/1,8-diiodooctane co-solvent have achieved significantly better performance than those using conventional chlorobenzene/1,8-diiodooctane, which is attributed to the enhanced diode characteristics, higher charge-carrier mobility, and the improved morphology. More importantly, the bromobenzene/1,8-diiodooctane system has also demonstrated improved performance for other polymer/fullerene composites. Thus, we conclude that, with appropriate boiling point, intriguing solubility for active materials, and good compatibility with 1,8-diiodooctane, bromobenzene can be an excellent alternative solvent used for some polymer/fullerene systems in polymer/fullerene solar cells.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.4880207
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2014
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 3
    Online Resource
    Online Resource
    A Cu/P-type GaN triboelectric nanogenerator with power density over 100 W/m2
    AIP Publishing ; 2022
    In:  Applied Physics Letters Vol. 120, No. 9 ( 2022-02-28)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 120, No. 9 ( 2022-02-28)
    Abstract: The metal-semiconductor direct current triboelectric nanogenerator (MSDC-TENG) has attracted increasing attention due to its power density, which is 102−103 times higher than traditional generators. A P-type GaN based MSDC-TENG with a tin electrode is reported in this paper. By adjusting the Mg2+ doping concentration of the P-GaN, it can achieve an open circuit voltage (Voc) of 14.2 V and a short circuit current (Isc) density of ∼25.5 A/m2. This Isc is about 50 times higher than the performance of the Cu/GaN Triboelectric Nanogenerator, and the power density increases by more than 120 times. Under the experimental loading conditions, we also obtained the maximum load current density and the maximum load power of 12.8 and 102.4 W/m2, respectively. This power density is sufficient to drive small electronic circuits. Our results also provide useful insights into the carrier concentration-Isc relation in the Cu/GaN triboelectric nanogenerator.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/5.0076658
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 4
    Online Resource
    Online Resource
    Highly efficient A-site cation exchange in perovskite quantum dot for solar cells
    AIP Publishing ; 2022
    In:  The Journal of Chemical Physics Vol. 157, No. 3 ( 2022-07-21)
    Details
    In: The Journal of Chemical Physics, AIP Publishing, Vol. 157, No. 3 ( 2022-07-21)
    Abstract: The mixed cation colloidal Cs1−XFAXPbI3 perovskite quantum dots (PQDs) obtained by cation exchange between CsPbI3 and FAPbI3 PQDs have been reported to exhibit enhanced photovoltaic performance. However, the cation exchange mechanism requires further in-depth investigation in terms of both material properties and device application. In this work, the impact of PQD weight ratio, PQD concentration, and host solvent polarity during cation exchange is comprehensively investigated for the first time. In addition, the whole exchange process under varying conditions is monitored by photoluminescence spectroscopy. As a result, we observe extremely fast cation exchange (∼20 min) under a condition at a CsPbI3/FAPbI3 PQD weight ratio of 1:1, a concentration of 70 mg/ml, and a host solvent using toluene. Moreover, we directly fabricate a PQD solar cell device using these obtained mixed cation Cs0.5FA0.5PbI3 PQDs and achieved an enhanced power conversion efficiency of 14.58%. We believe that these results would provide more insights into the cation exchange in emerging PQDs toward efficient photovoltaic fabrication and application.
    Type of Medium: Online Resource
    ISSN: 0021-9606 , 1089-7690
    URL: Article
    DOI: 10.1063/5.0100258
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 3113-6
    detail.hit.zdb_id: 1473050-9
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  • 5
    Online Resource
    Online Resource
    Efficient all polymer solar cells employing donor polymer based on benzo[1,2-b:4,5-b’]dithiophene unit
    AIP Publishing ; 2015
    In:  AIP Advances Vol. 5, No. 11 ( 2015-11-01)
    Details
    In: AIP Advances, AIP Publishing, Vol. 5, No. 11 ( 2015-11-01)
    Abstract: We reported all polymer solar cells (all-PSCs) employing BDT-based donor–acceptor (D–A) polymers composed of benzo[1,2-b:4,5-b’]dithiophene (BDT) and thiadiazolo[3,4-c] pyridine (PyTZ) (PBPT-8 and PBPT-12) as donor and NDI-based n-type polymer Poly{[N,N’-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5’-(2,2’-bithiophene)} (P(NDI2OD-T2)) (N2200) as acceptor. The influence of thermal annealing on the performance of all-PSCs was systematically investigated and discussed. It was found that the pre-annealing of the active blend films could significantly improve the all-PSCs performance. Both PBPT-8/PBPT-12:N2200 systems can deliver promising PCEs (4.12% and 4.25%) at the optimal annealing temperature of 160 oC due to the promoted film quality and charge transport properties. Morphology investigation and carrier mobility measurements have been carried out to analyze the effect of thermal annealing. This study suggests that BDT-based polymer:N2200 systems can be promising candidates for all-PSCs, with thermal annealing as an effective approach to promote the device performance.
    Type of Medium: Online Resource
    ISSN: 2158-3226
    URL: Article
    DOI: 10.1063/1.4935870
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2015
    detail.hit.zdb_id: 2583909-3
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  • 6
    Online Resource
    Online Resource
    A switchable and stable single-longitudinal-mode, dual-wavelength erbium-doped fiber laser assisted by Rayleigh backscattering in tapered fiber
    AIP Publishing ; 2015
    In:  Journal of Applied Physics Vol. 118, No. 10 ( 2015-09-14)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 118, No. 10 ( 2015-09-14)
    Abstract: We have proposed and demonstrated a novel switchable single-longitudinal-mode (SLM), dual-wavelength erbium-doped fiber laser (DWEDFL) assisted by Rayleigh backscattering (RBS) in a tapered fiber in a ring laser configuration. The RBS feedback in a tapered fiber is a key mechanism as linewidth narrowing for laser output. A compound laser cavity ensured that the EDFL operated in the SLM state and a saturable absorber (SA) is employed to form a gain grating for both filtering and improving wavelength stability. The fiber laser can output dual wavelengths simultaneously or operate at single wavelength in a switchable manner. Experiment results show that with the proper SA, the peak power drift was improved from 1–2 dB to 0.31 dB and the optical signal to noise ratio was higher than 60 dB. Under the assistance of RBS feedback, the laser linewidths are compressed by around three times and the Lorentzian 3 dB linewidths of 445 Hz and 425 Hz are obtained at 1550 nm and 1554 nm, respectively.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.4930054
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2015
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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