http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Yanliang Zhao (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Song, Mingjun,Zhao, Wang,Ran, Weiguang,Xue, Junpeng,Liu, Yanliang,Jeong, Jung Hyun Elsevier 2019 JOURNAL OF ALLOYS AND COMPOUNDS Vol.803 No.-
<P><B>Abstract</B></P> <P>In this research, a series of Tb<SUP>3+</SUP> and/or Eu<SUP>3+</SUP> doped KBaGd(WO<SUB>4</SUB>)<SUB>3</SUB> (KBGW for short) phoshpors were prepared by sol-gel method and characterized by X-ray diffraction (XRD), FT-IR and Raman spectra, scanning electron microscope (SEM), excitation and emission spectra, and luminescent decay curves. The results of XRD, SEM, FT-IR and Raman spectra confirmed that a single phase of KBGW with smooth surface and uniform particle size can be synthesized by sol-gel method. Under 250 or 378 nm excitation, multicolor tunable emissions from green to red were achieved in the KBGW:Tb<SUP>3+</SUP>, Eu<SUP>3+</SUP> phosphors by suitably controlling the ratios of Eu<SUP>3+</SUP>/Tb<SUP>3+</SUP>. The energy transfer efficiencies and mechanisms between Eu<SUP>3+</SUP> and Tb<SUP>3+</SUP> were investigated on the basis of photoluminescence (PL) spectra and luminescent decay curves, and a graphic analysis on the energy transfer process between Tb<SUP>3+</SUP> and Eu<SUP>3+</SUP> was presented. The temperature-dependent PL spectra of Eu<SUP>3+</SUP> and/or Tb<SUP>3+</SUP> doped KBGW were recorded and the thermal quenching behavior of the phosphors was analyzed in the framework of crossover model. At the end, green, red and white LEDs were fabricated with the as-prepared KBGW:Tb<SUP>3+</SUP>/Eu<SUP>3+</SUP> phosphors, and the excellent electroluminescence parameters suggest that the KBGW:Tb<SUP>3+</SUP>/Eu<SUP>3+</SUP> phosphors may be a component candidate for NUV excited WLEDs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A color tunable KBaGd(WO<SUB>4</SUB>)<SUB>3</SUB>:Tb<SUP>3+</SUP>/Eu<SUP>3+</SUP> phosphor was firstly prepared by sol-gel method. </LI> <LI> Its morphology, luminescent property and thermal stability were studied in detail. </LI> <LI> The emission color was tuned from green to red by changing the doping ratio of Eu/Tb. </LI> <LI> The energy transfer is demonstrated to be accomplished by dipole-dipole interactions. </LI> <LI> Green, red and white LEDs were fabricated and their performance were investigated. </LI> </UL> </P>
-
Facile Fabrication of MCo2S4(M = Mn, Ni) Nanotube Arrays for High-Performance Supercapacitors
Peng Li,Xiaoxiao Ma,Fei Liu,Junhua Tan,Yanliang Zhao,Liyong Wang,Kaijin Zhu 대한금속·재료학회 2019 ELECTRONIC MATERIALS LETTERS Vol.15 No.4
MCo2S4(M = Mn, Ni) nanomaterials are attracting considerable attention because of their unique nanostructure, good redoxproperties, excellent theoretical capacitance, low cost and easy preparation. Herein, MCo2S4(M = Mn, Ni) nanotube arrayshave been fabricated by a one-pot hydrothermal method and could be used as conductive additive and binder-free electrodesfor supercapacitors. The results show that the specific capacitance of MCo2S4(M = Mn or Ni) nanotube arrays could reachas high as 2667 and 1623 F/g at the current density of 10 A/g, respectively, indicating high rate performance. Furthermore,the MnCo2S4nanotube arrays exhibited excellent cycling stability (68% of initial specific capacitance after 1800 cycles). These excellent electrochemical properties benefit from the synergistic effects of unique tubular microstructure and highconductivity of the samples.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
