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Browsing by Author Pham, Thanh Huy

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  • 229.pdf.jpg
  • Article

  • Blue and green light emission from silicon nanocrystals embedded in silicon dioxide matrices

    • Authors: Pham, Thanh Huy; Vu, Van Thu; Nguyen, Duc Chien (2003)

  • In this paper we report on light emission from silicon nanostructures prepared by rf co-sputtering in argon of pure silicon and silicon dioxide. The concentration of excess silicon was varied in the range 0.5% to 1.8%. Specimens were subjected to thermal anneal up to 1100C in a nitrogen atmosphere.
  • item.jpg
  • Conference Paper

  • Integrating Climate Change Adaptation into Urban Planning of Vietnamese Coastal Towns toward Sustainable Development

    • Authors: Pham, Thanh Huy (2019)

  • The paper mentions the content of urban planning and sustainable development for Vietnamese coastal towns adapting to climate change. Using some methodologies of the research such as specialist method, method of investigation and assessment, etc. is order to summarize, investigate, and analyze several existing urban structures of these coastal towns in the context of climate change, then classifying these towns into some groups of urban characteristic in the research location like seafront towns, littoral towns and coastal mangrove towns with some different criteria. The paper also analyzes the impacts of climate change on urban structure and vice versa, integrating into sustainable u...
  • item.jpg
  • Journal Article

  • Photoluminescent Properties of Red-emitting AlPO4:Cr3+ Phosphor for Plant Growth LEDs

    • Authors: Tran, Manh Trung; Nguyen, Tu; Nguyen, Van Quang; Do, Quang Trung; Pham, Thanh Huy (2021)

  • In this study, red-emitting AlPO4:Cr3+ phosphors have been successfully synthesized by a facile sol-gel method. The Tanabe–Sugano diagram demonstrates that the surrounding sites of Cr3+ ions have a high crystal field with Dq/B=2.47. The sharp 694-nm peak on the PL of AlPO4:Cr3+ phosphor could be attributed to the 2E→4A2 electron transition of Cr3+ ions. The AlPO4:0.3%Cr3+ phosphor presents the highest PL intensity, then a purple LED prototype is obtained by coating the optimum powder on a UV LED chip. The color coordinates (0.2412, 0.1330) of the purple LED prototype imply that AlPO4:Cr3+ phosphors are promosing to be used as deep red phosphor powder for horticulture LED l...
  • 4158-97-8106-1-10-20171016.pdf.jpg
  • Article

  • Study on Structures and Photoluminescence Emission of ZnS Microcrystals Grown by Thermal Deposition

    • Authors: Nguyen, Van Nghia; Pham, Thanh Huy; Le, Van Vu; Nguyen, Duy Hung (2017)

  • We are interested in long-lived heavy charged particles because they would be possible SUSY particle candidats. This paper shows our preliminary results of long-lived heavy charged particles generation using PYTHIA 8. More than 107 events have been generated with pp collisions at energy in the center of mass = 13 TeV and about 3.27 105 long-lived heavy charged particles candidates have been found in the geometric acceptance of the LHCb detector. Long-lived heavy charged particles has mass 1.025 TeV/c2 and lifetime 157.7 nanoseconds, therefore they can travel throughout all subdetectors. We try not only calculate their acceptance in function of transverse momentum and rapidit...
  • Synthesis-and-optical-properties-of-red-blue-emitting-Sr2MgSi2O7-Eu3-Eu2-phosphors-for-white-LED_2016_Journal-of-Science-Advanced-Materials-and-Device.pdf.jpg
  • Article

  • Synthesis and optical properties of red/blue-emitting Sr2MgSi2O7:Eu 3 +/Eu 2+ phosphors for white LED

    • Authors: Tong, Thi Hao Tam; Nguyen, Duy Hung; Nguyen, Thi Kim Lien; Nguyen, Duc Trung Kien; Pham, Thanh Huy (2016)

  • Phosphor-converted white light emitting diodes (white LEDs) have received great attention in recent years since they have several excellent features such as high lumen output, low power consumption, long lifetime and environmentally friendly. In this work, we report the co-precipitation synthesis of red/blue Sr2MgSi2O7:Eu 3+ /Eu 2+ phosphors with various Eu doping concentration. The results show that the ob-tained Sr2MgSi2O7:Eu 3+ /Eu 2+ phosphors have good crystallinity and emit strong red (Sr2MgSi2O7:Eu 3+ ) and blue (Sr2MgSi2O7:Eu 2+) emissions under near UV light excitation. The sharp emission peaks at 577, 590, 612, 653, and 701 nm corresponded to the typical 5 D0/7 Fj (j=0,1...

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Browsing by Author Pham, Thanh Huy

Jump to: 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
or enter first few letters:  
Showing results 1 to 5 of 5
  • 229.pdf.jpg
  • Article

  • Blue and green light emission from silicon nanocrystals embedded in silicon dioxide matrices

    • Authors: Pham, Thanh Huy; Vu, Van Thu; Nguyen, Duc Chien (2003)

  • In this paper we report on light emission from silicon nanostructures prepared by rf co-sputtering in argon of pure silicon and silicon dioxide. The concentration of excess silicon was varied in the range 0.5% to 1.8%. Specimens were subjected to thermal anneal up to 1100C in a nitrogen atmosphere.
  • item.jpg
  • Conference Paper

  • Integrating Climate Change Adaptation into Urban Planning of Vietnamese Coastal Towns toward Sustainable Development

    • Authors: Pham, Thanh Huy (2019)

  • The paper mentions the content of urban planning and sustainable development for Vietnamese coastal towns adapting to climate change. Using some methodologies of the research such as specialist method, method of investigation and assessment, etc. is order to summarize, investigate, and analyze several existing urban structures of these coastal towns in the context of climate change, then classifying these towns into some groups of urban characteristic in the research location like seafront towns, littoral towns and coastal mangrove towns with some different criteria. The paper also analyzes the impacts of climate change on urban structure and vice versa, integrating into sustainable u...
  • item.jpg
  • Journal Article

  • Photoluminescent Properties of Red-emitting AlPO4:Cr3+ Phosphor for Plant Growth LEDs

    • Authors: Tran, Manh Trung; Nguyen, Tu; Nguyen, Van Quang; Do, Quang Trung; Pham, Thanh Huy (2021)

  • In this study, red-emitting AlPO4:Cr3+ phosphors have been successfully synthesized by a facile sol-gel method. The Tanabe–Sugano diagram demonstrates that the surrounding sites of Cr3+ ions have a high crystal field with Dq/B=2.47. The sharp 694-nm peak on the PL of AlPO4:Cr3+ phosphor could be attributed to the 2E→4A2 electron transition of Cr3+ ions. The AlPO4:0.3%Cr3+ phosphor presents the highest PL intensity, then a purple LED prototype is obtained by coating the optimum powder on a UV LED chip. The color coordinates (0.2412, 0.1330) of the purple LED prototype imply that AlPO4:Cr3+ phosphors are promosing to be used as deep red phosphor powder for horticulture LED l...
  • 4158-97-8106-1-10-20171016.pdf.jpg
  • Article

  • Study on Structures and Photoluminescence Emission of ZnS Microcrystals Grown by Thermal Deposition

    • Authors: Nguyen, Van Nghia; Pham, Thanh Huy; Le, Van Vu; Nguyen, Duy Hung (2017)

  • We are interested in long-lived heavy charged particles because they would be possible SUSY particle candidats. This paper shows our preliminary results of long-lived heavy charged particles generation using PYTHIA 8. More than 107 events have been generated with pp collisions at energy in the center of mass = 13 TeV and about 3.27 105 long-lived heavy charged particles candidates have been found in the geometric acceptance of the LHCb detector. Long-lived heavy charged particles has mass 1.025 TeV/c2 and lifetime 157.7 nanoseconds, therefore they can travel throughout all subdetectors. We try not only calculate their acceptance in function of transverse momentum and rapidit...
  • Synthesis-and-optical-properties-of-red-blue-emitting-Sr2MgSi2O7-Eu3-Eu2-phosphors-for-white-LED_2016_Journal-of-Science-Advanced-Materials-and-Device.pdf.jpg
  • Article

  • Synthesis and optical properties of red/blue-emitting Sr2MgSi2O7:Eu 3 +/Eu 2+ phosphors for white LED

    • Authors: Tong, Thi Hao Tam; Nguyen, Duy Hung; Nguyen, Thi Kim Lien; Nguyen, Duc Trung Kien; Pham, Thanh Huy (2016)

  • Phosphor-converted white light emitting diodes (white LEDs) have received great attention in recent years since they have several excellent features such as high lumen output, low power consumption, long lifetime and environmentally friendly. In this work, we report the co-precipitation synthesis of red/blue Sr2MgSi2O7:Eu 3+ /Eu 2+ phosphors with various Eu doping concentration. The results show that the ob-tained Sr2MgSi2O7:Eu 3+ /Eu 2+ phosphors have good crystallinity and emit strong red (Sr2MgSi2O7:Eu 3+ ) and blue (Sr2MgSi2O7:Eu 2+) emissions under near UV light excitation. The sharp emission peaks at 577, 590, 612, 653, and 701 nm corresponded to the typical 5 D0/7 Fj (j=0,1...