The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
pandangan teks lengkap
92
Dalam bidang paparan LED mikro yang terdiri daripada tatasusunan UV atau LED Biru dan fosfor, di mana cip yang digunakan adalah sangat kecil, saiz zarah fosfor mestilah kecil untuk menyekat variasi warna bagi setiap piksel. Terutamanya, terdapat permintaan yang kuat untuk fosfor merah dengan saiz zarah yang kecil. Walau bagaimanapun, hasil kuantum fosfor tak organik berkurangan apabila saiz zarah fosfor semakin kecil. Sebaliknya, dalam kes fosfor dan kompleks organik, hasil kuantum tidak berkurangan apabila saiz zarah semakin kecil kerana setiap molekul mempunyai fungsi menyerap dan memancarkan cahaya. Kami menumpukan pada kompleks Eu(III) sebagai calon fosfor merah untuk paparan mikro-LED kerana ketulenan warna spektrum photoluminescence adalah tinggi, dan telah cuba meningkatkan keamatan fotoluminesen dengan menyelaraskan ligan bukan ionik, khususnya, ligan fosfin oksida yang direka bentuk baru. . Ligan bukan ionik secara amnya kurang mempengaruhi sifat kompleks berbanding ligan ionik, tetapi mempunyai tahap fleksibiliti yang tinggi dalam reka bentuk molekul. Kami menemui konsep reka bentuk molekul baru ligan fosfin oksida untuk meningkatkan sifat fotoluminesen kompleks Eu(III). Kali ini, novel dinuklear Eu(III)-β-diketonates dengan ligan tetraphosphine tetraoxide bercabang, TDPBPO dan TDPPPO, telah dibangunkan. Mereka direka bentuk untuk mempunyai dua bahagian fosfin oksida yang berbeza; satu mempunyai substituen aromatik dan satu lagi tidak mempunyai substituen aromatik. Ligan TDPBPO dan TDPPPO mempunyai fungsi meningkatkan hasil kuantum mutlak Eu(III)-β-diketonates. Eu(III)-β-diketonates dengan ligan tetraphosphine tetraoxide bercabang mempunyai pelepasan merah yang tajam dan hasil kuantum yang sangat baik, dan merupakan calon yang menjanjikan untuk paparan LED mikro, media keselamatan, dan penderiaan untuk keamatan fotoluminesensi tulen dan kuatnya.
Hiroki IWANAGA
Toshiba Corporation
Fumihiko AIGA
Toshiba Corporation
Shin-ichi SASAOKA
NITTO KASEI CO., LTD.
Takahiro WAZAKI
NITTO KASEI CO., LTD.
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Salinan
Hiroki IWANAGA, Fumihiko AIGA, Shin-ichi SASAOKA, Takahiro WAZAKI, "Development and Photoluminescence Properties of Dinuclear Eu(III)-β-Diketonates with a Branched Tetraphosphine Tetraoxide Ligand for Potential Use in LEDs as Red Phosphors" in IEICE TRANSACTIONS on Electronics,
vol. E107-C, no. 2, pp. 34-41, February 2024, doi: 10.1587/transele.2023DII0004.
Abstract: In the field of micro-LED displays consisting of UV or Blue-LED arrays and phosphors, where the chips used are very small, particle size of phosphors must be small to suppress variation in hue for each pixel. Especially, there is a strong demand for a red phosphor with small particle sizes. However, quantum yields of inorganic phosphors decrease as particles size of phosphors get smaller. On the other hand, in the case of organic phosphors and complexes, quantum yields don't decrease when particle size gets smaller because each molecule has a function of absorbing and emitting light. We focus on Eu(III) complexes as candidates of red phosphors for micro-LED displays because their color purities of photoluminescence spectra are high, and have been tried to enhance photoluminescence intensity by coordinating non-ionic ligand, specifically, newly designed phosphine oxide ligands. Non-ionic ligands have generally less influential on properties of complexes compared with ionic ligands, but have a high degree of flexibility in molecular design. We found novel molecular design concept of phosphine oxide ligands to enhance photoluminescence properties of Eu(III) complexes. This time, novel dinuclear Eu(III)-β-diketonates with a branched tetraphosphine tetraoxide ligand, TDPBPO and TDPPPO, were developed. They are designed to have two different phosphine oxide portions; one has aromatic substituents and the other has no aromatic substituent. TDPBPO and TDPPPO ligands have functions of increasing absolute quantum yields of Eu(III)-β-diketonates. Eu(III)-β-diketonates with branched tetraphosphine tetraoxide ligands have sharp red emissions and excellent quantum yields, and are promising candidates for micro LED displays, security media, and sensing for their pure and strong photoluminescence intensity.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.2023DII0004/_p
Salinan
@ARTICLE{e107-c_2_34,
author={Hiroki IWANAGA, Fumihiko AIGA, Shin-ichi SASAOKA, Takahiro WAZAKI, },
journal={IEICE TRANSACTIONS on Electronics},
title={Development and Photoluminescence Properties of Dinuclear Eu(III)-β-Diketonates with a Branched Tetraphosphine Tetraoxide Ligand for Potential Use in LEDs as Red Phosphors},
year={2024},
volume={E107-C},
number={2},
pages={34-41},
abstract={In the field of micro-LED displays consisting of UV or Blue-LED arrays and phosphors, where the chips used are very small, particle size of phosphors must be small to suppress variation in hue for each pixel. Especially, there is a strong demand for a red phosphor with small particle sizes. However, quantum yields of inorganic phosphors decrease as particles size of phosphors get smaller. On the other hand, in the case of organic phosphors and complexes, quantum yields don't decrease when particle size gets smaller because each molecule has a function of absorbing and emitting light. We focus on Eu(III) complexes as candidates of red phosphors for micro-LED displays because their color purities of photoluminescence spectra are high, and have been tried to enhance photoluminescence intensity by coordinating non-ionic ligand, specifically, newly designed phosphine oxide ligands. Non-ionic ligands have generally less influential on properties of complexes compared with ionic ligands, but have a high degree of flexibility in molecular design. We found novel molecular design concept of phosphine oxide ligands to enhance photoluminescence properties of Eu(III) complexes. This time, novel dinuclear Eu(III)-β-diketonates with a branched tetraphosphine tetraoxide ligand, TDPBPO and TDPPPO, were developed. They are designed to have two different phosphine oxide portions; one has aromatic substituents and the other has no aromatic substituent. TDPBPO and TDPPPO ligands have functions of increasing absolute quantum yields of Eu(III)-β-diketonates. Eu(III)-β-diketonates with branched tetraphosphine tetraoxide ligands have sharp red emissions and excellent quantum yields, and are promising candidates for micro LED displays, security media, and sensing for their pure and strong photoluminescence intensity.},
keywords={},
doi={10.1587/transele.2023DII0004},
ISSN={1745-1353},
month={February},}
Salinan
TY - JOUR
TI - Development and Photoluminescence Properties of Dinuclear Eu(III)-β-Diketonates with a Branched Tetraphosphine Tetraoxide Ligand for Potential Use in LEDs as Red Phosphors
T2 - IEICE TRANSACTIONS on Electronics
SP - 34
EP - 41
AU - Hiroki IWANAGA
AU - Fumihiko AIGA
AU - Shin-ichi SASAOKA
AU - Takahiro WAZAKI
PY - 2024
DO - 10.1587/transele.2023DII0004
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E107-C
IS - 2
JA - IEICE TRANSACTIONS on Electronics
Y1 - February 2024
AB - In the field of micro-LED displays consisting of UV or Blue-LED arrays and phosphors, where the chips used are very small, particle size of phosphors must be small to suppress variation in hue for each pixel. Especially, there is a strong demand for a red phosphor with small particle sizes. However, quantum yields of inorganic phosphors decrease as particles size of phosphors get smaller. On the other hand, in the case of organic phosphors and complexes, quantum yields don't decrease when particle size gets smaller because each molecule has a function of absorbing and emitting light. We focus on Eu(III) complexes as candidates of red phosphors for micro-LED displays because their color purities of photoluminescence spectra are high, and have been tried to enhance photoluminescence intensity by coordinating non-ionic ligand, specifically, newly designed phosphine oxide ligands. Non-ionic ligands have generally less influential on properties of complexes compared with ionic ligands, but have a high degree of flexibility in molecular design. We found novel molecular design concept of phosphine oxide ligands to enhance photoluminescence properties of Eu(III) complexes. This time, novel dinuclear Eu(III)-β-diketonates with a branched tetraphosphine tetraoxide ligand, TDPBPO and TDPPPO, were developed. They are designed to have two different phosphine oxide portions; one has aromatic substituents and the other has no aromatic substituent. TDPBPO and TDPPPO ligands have functions of increasing absolute quantum yields of Eu(III)-β-diketonates. Eu(III)-β-diketonates with branched tetraphosphine tetraoxide ligands have sharp red emissions and excellent quantum yields, and are promising candidates for micro LED displays, security media, and sensing for their pure and strong photoluminescence intensity.
ER -