White LED featuring remote phosphor with poly(vinylidene fluoride-co-hexafluoropropylene)

被引：5

作者：

Huang, Kuan-Chieh ^{[1
]}

Lu, Wen-Jie ^{[1
]}

Liao, Kuan-Yung ^{[1
]}

Tsai, Tai-Cheng ^{[1
]}

Lai, Teng-Hsien ^{[1
]}

Sheu, Gwo-Jiun ^{[1
]}

Li, Yun-Li ^{[1
]}

机构：

[1] Genesis Photon Inc, R&D Ctr, Tainan 74144, Taiwan

来源：

MATERIALS LETTERS | 2014年 / 122卷

关键词：

Composite materials; Polymers; Poly(vinylidene fluoride-co-hexafluoropropylene; Remote phosphor; White light-emitting diode; LIGHT; LAYER;

D O I：

10.1016/j.matlet.2014.02.061

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A flexible remote phosphor (RP) sheet based on thermally stable polymer, poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), is prepared for a warm white light-emitting diode (WLED) by adopting a simple route. The highly thermal stability of the PVDF-HFP is confirmed by means of thermogravimetric analysis. The luminous efficacy (65.7 +/- 2.9 lm/W) and the chromaticity coordinates (0.4578, 0.4107) of the WLED applying PVDF-HFP-based RP sheet remain steady under continuity of current injection of 350 mA for a long-term duration of 1000 h. A better uniformity in correlated color temperature (CCT) of such WLED is obtained, with reference to the CCT uniformity of a WLED made of sapphire-based RP. (C) 2014 Elsevier B.V. All rights reserved.

引用

收藏

页码：265 / 268

页数：4

相关论文

共 12 条

[1] Enhanced Luminous Efficiency of WLEDs Using a Dual-Layer Structure of the Remote Phosphor Package [J].

Chen, Kuo-Ju ;

Chen, Hsin-Chu ;

Shih, Min-Hsiung ;

Wang, Chao-Hsun ;

Tsai, Hsin-Han ;

Chien, Shih-Hsuan ;

Lin, Chien Chung ;

Kuo, Hao-Chung .

JOURNAL OF LIGHTWAVE TECHNOLOGY, 2013, 31 (12) :1941-1945

[2]

Fan BF, 2007, IEEE PHOTONIC TECH L, V19, P1121, DOI 10.1109/LPT.2007.901098

[3] Planar Lighting System Using Array of Blue LEDs to Excite Yellow Remote Phosphor Film [J].

Huang, Hsin-Tao ;

Huang, Yi-Pai ;

Tsai, Chuang-Chuang .

JOURNAL OF DISPLAY TECHNOLOGY, 2011, 7 (01) :44-51

[4] Improved CCT uniformity of white LED using remote phosphor with patterned sapphire substrate [J].

Huang, Kuan-Chieh ;

Lai, Teng-Hsien ;

Chen, Cheng-Yen .

APPLIED OPTICS, 2013, 52 (30) :7376-7381

[5] Polymeric Light-emitting Diode Using Fluorine-containing Polymer and Polyimide Heterojunction [J].

Kang, Eunjung ;

Keum, Jihwan ;

Kim, Youngkyoo ;

Cho, Won Jei ;

Ha, Chang Sik .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1998, 316 :261-264

[6] White light emission from Sm3+/Tb3+ codoped oxyfluoride aluminosilicate glasses under UV light excitation [J].

Lakshminarayana, G. ;

Yang, R. ;

Qiu, J. R. ;

Brik, M. G. ;

Kumar, G. A. ;

Kityk, I. V. .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2009, 42 (01)

[7] Large-Area (over 50 cm x 50 cm) Freestanding Films of Colloidal InP/ZnS Quantum Dots [J].

Mutlugun, Evren ;

Hernandez-Martinez, Pedro Ludwig ;

Eroglu, Cuneyt ;

Coskun, Yasemin ;

Erdem, Talha ;

Sharma, Vijay K. ;

Unal, Emre ;

Panda, Subhendu K. ;

Hickey, Stephen G. ;

Gaponik, Nikolai ;

Eychmueller, Alexander ;

Demir, Hilmi Volkan .

NANO LETTERS, 2012, 12 (08) :3986-3993

[8] Extracting phosphor-scattered photons to improve white LED efficiency [J].

Narendran, N ;

Gu, Y ;

Freyssinier-Nova, JP ;

Zhu, Y .

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2005, 202 (06) :R60-R62

[9] Polarized white light from LEDs using remote-phosphor layer sandwiched between reflective polarizer and light-recycling dichroic filter [J].

Oh, Ji Hye ;

Yang, Su Ji ;

Do, Young Rag .

OPTICS EXPRESS, 2013, 21 (18) :A765-A773

[10] Exploration of zinc phosphate glasses for white LED applications [J].

Segawa, Hiroyo ;

Hirosaki, Naoto ;

Ohki, Shinobu ;

Deguchi, Kenzo ;

Shimizu, Tadashi .

OPTICAL MATERIALS, 2013, 35 (12) :2677-2684