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| 1 | Synergistic improvement of perovskite film quality for efficient solar cells via multiple chloride salt additives显示文摘Perovskite crystal film quality is critical for obtaining efficient perovskite solar cells. Anti-solvent processing was used for fast crystallization of perovskite precursor film, which can form dense perovskite film.However, the crystals from this method are usually small due to the fast crystal growth process, which could lead to grain boundary recombination. Here, element chloride is introduced to enhance the perovskite layer crystallinity via slowing down the perovskite crystallization process by simultaneous introduction of methylammounium chloride(MACl) and cesium chloride(CsCl) into precursor solution.As a result, we achieve high quality of pin-hole free perovskite film with large crystal size. A power conversion efficiency of 21.55% with free of hysteresis of the device is obtained, which is among the highest efficiency of planar structure perovskite solar cells. | Pengyang Wang Qi Jiang Yang Zhao Yong Chen Zema Chu Xingwang Zhang Yuqin Zhou Jingbi You | 2018 | Science Bulletin2018，63，11： | 6 |
| 2 | Dynamic caustics test of blast load impact on neighboring different cross-section roadways显示文摘Using digital laser dynamic caustics experimental system and conducting simulation experiment researched the influence rule of blasting excavation of a new roadway on neighboring existed different cross-section roadways. The experimental results show that the influence of blast load on adjacent roadway has a good relationship with the cross-section of roadway. The expansion distance of precrack existed in circular, arch-wall, rectangular roadway is respectively 1.76, 1.61 and 0 cm under blast load.At the same time, the direct-blast side of rectangular roadway has more obvious damage compared with circular and arch-wall roadway. It explains that plane reflects more stress wave than arc, so that it exerts more tensile failure in the direct-blast side, which leads to less stress wave diffracting to the precrack in the back-blast side. When the precrack extends, higher value dynamic stress intensity factor in circular roadway works longer than that of arch-wall roadway. Indirectly, it explains that plane's weakening function on stress wave is significantly stronger than arc. Stress wave brings about self-evident influence on the upper and bottom endpoints of the rectangular roadway, and it respectively extends 1.03, 2.06 cm along the line link direction of the center of the blasthole and the upper and bottom endpoints on the right wall. | Guo Dongming Zhou Baowei Liu Kang Yang Renshu Yan Pengyang | 2016 | International Journal of Mining Science and Technology2016，26，5： | 5 |
| 3 | Catalytic effect of Ni@rGO on the hydrogen storage properties of MgH2显示文摘Uniform-uispersed Ni nanoparticics(NPs)anchored on reduced graphene oxide(Ni@rGO)catalyzed MgH2(MH-Ni@rGO)has been fabricated by mechanical milling.The effects of milling time and Ni loading amount on the hydrogen storage properties of MgH2 have been investigated.The initial hydrogen desorption temperature of MgH2 catalyzed by 10 wt.%Ni4@rGO6 for milling 5 h is significantly decreased from 251℃ to 190℃.The composite can absorb 5.0 wt.%hydrogen in 20 min at 100℃,while it can desorb 6.1 wt.%within 15 min at 300℃.Through the investigation of the phase transformation and dehydrogenation kinetics during hydrogen ab/desorption cycles,we found that the in-situ formed Mg2Ni/Mg2NiH4 exhibited better catalytic effect than Ni.When Ni loading amount is 45 wt.%,the rGO in Ni@rGO catalysts can prevent the reaction of Ni and Mg due to the strong interaction between rGO and Ni NPs. | Pengyang Yao Ying Jiang Yang Liu Chengzhang Wu Kuo-Chih Chou Tao Lyu Qian Li | 2020 | Journal of Magnesium and Alloys2020，8，2： | 4 |
| 4 | ZIF-derived Co-N-C ORR catalyst with high performance in proton exchange membrane fuel cells显示文摘Metal and nitrogen-doped carbon(M-N-C)materials have been considered as the most promising non-precious metal oxygen reduction(ORR)catalysts to replace expensive Pt catalysts.Due to high Fenton catalytic activity of Fe element and the resulting instability,Co-based N-C(Co-N-C)catalysts without Fenton catalytic activity should be a worthier ORR catalyst being explored.Although the high ORR activity of Co-N-C catalyst has been demonstrated in aqueous half-cell tests,their performance under PEMFC working condition is still far away from that of state-of-the-art Fe-N-C catalysts.In this study,a high-performance Co-N-C catalyst was synthesized by one-step pyrolyzing Co-doped ZIF-8(zeolitic imidazolate framework-8)particles in-situ grown on the highsurface-area KJ600 carbon black with high electronic conductivity.The resulting Co-N-C catalyst exhibited high intrinsic ORR activity,fast mass transfer rate and high electronic conductivity,and thus yielded a remarkable peak power density of 0.92 W cm^(-2) in H_(2)-O_(2) PEMFC,which is comparable to state-of-the-art Fe-N-C catalyst.This strategy is helpful to synthesize highly active M-N-C ORR catalysts with improved mass transfer and electric conductivity. | Ruixiang Wang Pengyang Zhang Yucheng Wang Yuesheng Wang Karim Zaghib Zhiyou Zhou | 2020 | Progress in Natural Science:Materials International2020，30，6： | 4 |
| 5 | Investigation of the influence of ultrasonic stirring on mass transfer in the through-mask electrochemical micromachining process显示文摘Surface texturing is a widely accepted approach for friction reduction between mechanical components. Through-mask electrochemical micromachining is a simple and reliable process for metal surface texturing in which mass transport conditions have profound influence on final machined quality. An ultrasonic stirrer is usually adopted for mass transfer enhancement.However, understanding of the effects of ultrasonic stirring on mass transfer is limited, and is far from sufficient for developing guidelines for its practical application. In this work, the influences of ultrasonic stirring parameters on mass transfer have been investigated numerically and experimentally. With the numerical method, periodic pressure change in the electrolyte over time has been obtained, showing that ultrasonic stirring results in drastic transient pressure change in electrolyte fluid fields. Parameters related to ultrasonic frequency, vibration amplitude, and the depth of anode surface immersed in the electrolyte solution influence pressure amplitude. Validation experiments have been conducted and etched surface profile and morphology characterized,which show that the experimental observations are in agreement with numerical predictions. With the optimized mass transfer,well-defined micro-pits array of 30 μm and a smooth etched surface on tin-bronze substrate in large scale have been demonstrated. | WANG QuanDai CAI XingXing WANG Li LI PengYang XIAO JiMing LI Yan | 2018 | Science China(Technological Sciences)2018，61，2： | 3 |
| 6 | Experimental Study on Dynamic Mechanical Properties of Sprayed Concrete-Surrounding Rock Combined Body显示文摘To investigate the dynamic response problem of the double medium formed by the adherence of sprayed concrete and surrounding rock in the tunnel,a split Hopkinson pressure bar of 75 mm in diameter was adopted at the ages of 3,7 and 10 d.Experimental results showed that dynamic compressive strength and dynamic increase factors(DIF)of the combined bodies increase with the strain rate.With the growth of strain rate,the critical strain of the combined bodies first increases,then deceases.Furthermore,the combined bodies of 3 d reveal the plastic property and brittle property for 7 d and 10 d when the strain rate is over 80/s.The failure characteristic of the sprayed concrete changes from tearing strain damage to crushing damage as the growth of strain rate,and the failure characteristic of rock presents the tensile failure mode as demonstrated by the scanning electron microscope(SEM). | Dongming Guo Pengyang Yan Longfei Fan Yingshi Zhang Xiaoye Wang | 2019 | Journal of Beijing Institute of Technology2019，28，2： | 3 |
| 7 | An Electrochromic Nickel Phosphate Film for Large-Area Smart Window with Ultra-Large Optical Modulation显示文摘Exploring materials with high electrochemical activity is of keen interest for electrochemistry-controlled optical and energy storage devices.However,it remains a great challenge for transition metal oxides to meet this feature due to their low electron conductivity and insufficient reaction sites.Here,we propose a type of transition metal phosphate(NiHPO_(4)·3H_(2)O,NHP)by a facile and scalable electrodeposition method,which can achieve the capability of efficient ion accommodation and injection/extraction for electrochromic energy storage applications.Specifically,the NHP film with an ultra-high transmittance(approach to 100%)achieves a large optical modulation(90.8%at 500 nm),high coloration efficiency(75.4 cm^(2)C^(-1)at 500 nm),and a high specific capacity of 47.8 mAh g^(-1)at 0.4 A g^(-1).Furthermore,the transformation mechanism of NHP upon electrochemical reaction is systematically elucidated using in situ and ex situ techniques.Ultimately,a large-area electrochromic smart window with 100 cm^(2)is constructed based on the NHP electrode,displaying superior electrochromic energy storage performance in regulating natural light and storing electrical charges.Our findings may open up new strategies for developing advanced electrochromic energy storage materials and smart windows. | Pengyang Lei Jinhui Wang Yi Gao Chengyu Hu Siyu Zhang Xingrui Tong Zhuanpei Wang Yuanhao Gao Guofa Cai | 2023 | Nano-Micro Letters2023，15，3： | 2 |
| 8 | A Novel SAR Image Segmentation Method Using Run-Length Grouping显示文摘 | HU Lei JI Yan HOU Pengyang LI Bo | 2013 | Chinese Journal of Electronics2013，22，2： | 2 |
| 9 | Rapid nanopatterning technique based on monolayer silica nanosphere close-packing by spin coating显示文摘Nanoparticles monolayer formation by spin coating is considered to be a simple, fast and inexpensive nanopatterning technique. However, the parameters that govern the overall growth process in this technique are not completely quantified and techniques for the controlled and continuous growth of close packed monolayer particle arrays without defects need to be developed. In this paper, an ordered particle array formation process is analyzed theoretically, employing material flux balance and particle-subjected forces balance, based on the film thickness model of spin coating and evaporation rate law. A series of experiments were conducted using silica particle suspensions with various particle volume fractions and different spin speeds. The results show that the spin speed should match the particle volume fraction to meet the requirements of material flux and particles movement in order to obtain a close packed monolayer film. The formation mechanism of fabrication defects involving particle agglomeration and uncontrollable voids were analyzed qualitatively based on crystal growth theory, and validation experiments were performed. The formation of highly uniform close-packed monolayer films was demonstrated and the condition requirements for achieving monolayer nanoparticles array with good quality presented. | WANG QuanDai YE Lian WANG Li LI PengYang CAO Yi LI Yan | 2016 | Science China(Technological Sciences)2016，59，10： | 2 |
| 10 | Multilevel minimum cross entropy threshold selection based on particle swam optimization显示文摘 | YIN Pengyang | 2007 | Applied Mathematic and Computation2007，184，2： | 1 |
| 11 | Stimulatory effects of Coix lacryma-jobi oil on the mycelial growth and metabolites biosynthesis by the submerged culture of Ganoderma lucidum显示文摘 | Hailong Yang Weihong Min Pengyang Bi Huabin Zhou Furu Huang | 2013 | Biochemical Engineering Journal2013，，： | 1 |
| 12 | Elasto-plastic indentation of a half-space by a rigid sphere under normal and torque loading显示文摘 | LI Pengyang WANG Zhanjiang LI Xiaoyong | 2013 | Tribology International2013，62，： | 1 |
| 13 | Temperaturesensingusingthebandgap-likeeffectinaselectivelyliquid-filledphotoniccrystalfiber显示文摘 | PengYang HouJing ZhangYang etal | 2013 | OptLetters2013，38，3： | 1 |
| 14 | Preparation and physical properties of enhanced radiation induced crosslinking of ethylene-vinyl alcohol copolymer (EVOH)显示文摘 | Deng Pengyang Liu Meihua Zhang Wanxi | 2007 | Nuclear Instruments and Methods in Physics Research (B)2007，258，： | 1 |
| 15 | I/P interface modification for stable and efficient perovskite solar cells显示文摘Interface engineering has played an increasingly essential role in the development of perovskite solar cells(PSCs).Herein,we adopted an effective and simple one-step interface passivation method on a FA-based perovskite to fabricate efficient and stable planar PSCs.The surface defects are reduced by the perovskite interface passivation layer incorporated between the hole transport and perovskite absorber layers,and then non-radiative recombination is suppressed while interfacial carrier extraction is enhanced.The passivated planar PSCs demonstrates 20.83%power conversion efficiency(PCE),which is caused by the simultaneous enhancement of the fill factor and open-circuit voltage.In addition,the device also shows great ambient and thermal stability.It retains 94%of its original PCE after 1000 h under ambient air without encapsulation as well as90%of its initial efficiency after 400 h under continuous heating at 65°C with encapsulation.This research provides a strategy for the development of efficient and stable PSCs. | Jie Zhang Shixin Hou Renjie Li Bingbing Chen Fuhua Hou Xinghua Cui Jingjing Liu Qi Wang Pengyang Wang Dekun Zhang Ying Zhao Xiaodan Zhang | 2020 | Journal of Semiconductors2020，41，5： | 1 |
| 16 | Two al-kaloids from Chinese bittersweet celastrus angulatus显示文摘 | WEI Pengyang TIAN Zuzhi LING Jiguang | 1999 | Phytochemistry1999，52，： | 1 |
| 17 | Characterization of lead ( II )-containing activated carbon and itsexcellent performance of extending lead-acid battery cycle life for high-rate partial-state-of- charge operation 显示文摘 | Pengyang Tong | 2015 | Journal of Power Sources2015，286，： | 1 |
| 18 | Composite electron transport layer for efficient N-I-P type monolithic perovskite/silicon tandem solar cells with high open-circuit voltage显示文摘Perovskite/silicon tandem solar cells(PSTSCs) have exhibited huge technological potential for breaking the Shockley-Queisser limit of single-junction solar cells. The efficiency of P-I-N type PSTSCs has surpassed the single-junction limit, while the performance of N-I-P type PSTSCs is far below the theoretical value. Here, we developed a composite electron transport layer for N-I-P type monolithic PSTSCs with enhanced open-circuit voltage(VOC) and power conversion efficiency(PCE). Lithium chloride(Li Cl) was added into the tin oxide(SnO_(2)) precursor solution, which simultaneously passivated the defects and increased the electron injection driving force at the electron transfer layer(ETL)/perovskite interface.Eventually, we achieved monolithic PSTSCs with an efficiency of 25.42% and V_(OC) of 1.92 V, which is the highest PCE and VOCin N-I-P type perovskite/Si tandem devices. This work on interface engineering for improving the PCE of monolithic PSTSCs may bring a new hot point about perovskite-based tandem devices. | Bingbing Chen Pengyang Wang Renjie Li Ningyu Ren Yongliang Chen Wei Han Lingling Yan Qian Huang Dekun Zhang Ying Zhao Xiaodan Zhang | 2021 | Journal of Energy Chemistry2021，30，12： | 1 |
| 19 | Tin dioxide buffer layer-assisted efficiency and stability of wide-bandgap inverted perovskite solar cells显示文摘Inverted perovskite solar cells(IPSCs) have attracted tremendous research interest in recent years due to their applications in perovskite/silicon tandem solar cells. However, further performance improvements and long-term stability issues are the main obstacles that deeply hinder the development of devices. Herein, we demonstrate a facile atomic layer deposition(ALD) processed tin dioxide(SnO2) as an additional buffer layer for efficient and stable wide-bandgap IPSCs. The additional buffer layer increases the shunt resistance and reduces the reverse current saturation density, resulting in the enhancement of efficiency from 19.23% to 21.13%. The target device with a bandgap of 1.63 eV obtains open-circuit voltage of 1.19 V, short circuit current density of 21.86 mA/cm^(2), and fill factor of 81.07%. More importantly, the compact and stable SnO_(2) film invests the IPSCs with superhydrophobicity, thus significantly enhancing the moisture resistance. Eventually, the target device can maintain 90% of its initial efficiency after 600 h storage in ambient conditions with relative humidity of 20%–40% without encapsulation. The ALD-processed SnO_(2) provides a promising way to boost the efficiency and stability of IPSCs, and a great potential for perovskite-based tandem solar cells in the near future. | Bingbing Chen Pengyang Wang Ningyu Ren Renjie Li Ying Zhao Xiaodan Zhang | 2022 | Journal of Semiconductors2022，43，5： | 1 |
| 20 | Effects of radiation-induced crosslinking on thermal and mechanical properties of poly(lactic acid) composites reinforced by basalt fiber显示文摘 | LIU Meihua YIN Yuan WEI Wei ZHENG Chunbai SHEN Shirley DENG Pengyang ZHANG Wanxi | 2013 | Nuclear Science and Techniques2013，24，B12： | 1 |
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