White light emission from blue InGaN LED with fluorescent conjugated polymer blends

Hong Jeong Yu; Kwanhwi Park; Wonkeun Chung; Jihyun Klm; Byung Hee Chun; Sung Hyun Kim

doi:10.1295/polymj.PJ2009152

White light emission from blue InGaN LED with fluorescent conjugated polymer blends

Hong Jeong Yu, Kwanhwi Park, Wonkeun Chung, Jihyun Klm, Byung Hee Chun, Sung Hyun Kim

* Honorary professors

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

White LEDs were fabricated by precoating blue InGaN LEDs with blends of a green emitting polymer (Poly[{9, 9-dioctyl-2, 7-divinylenefluorenylene)-alto-co- (2-methoxy-5-(2-ethylhexyloxy)-l, 4-phenylene)], PFPV) and a red emitting polymer (Poly[l-methoxy-4-(2-ethylhexyloxy-2, 5-phenylenevinylene)], MEH-PPV), which acted as the phosphor. The two polymers were blended in different weight ratios, which were found to affect the green (555 nm) and red (610 nm) emission intensity. The CIE-1931 coordinate, T_c and R_a all changed as the MEH-PPV content increased. The white LED of the polymer blend phosphor containing 33wt% MEH-PPV had a luminous efficiency of 54.2 lm/W at 20 mA with a CIE-1931 coordinate, T_c and R_a of (0.3328. 0.3547L 5488 and 71.4. respectively.

Original language	English
Pages (from-to)	1076-1079
Number of pages	4
Journal	Polymer Journal
Volume	41
Issue number	12
DOIs	https://doi.org/10.1295/polymj.PJ2009152
Publication status	Published - 2009

Keywords

Conjugated polymer blending
Electroluminescence
Phosphors
White light emitting diodes

ASJC Scopus subject areas

Polymers and Plastics
Materials Chemistry

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10.1295/polymj.PJ2009152

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@article{eb09ec5f7cb84a219011ae33313bf18a,

title = "White light emission from blue InGaN LED with fluorescent conjugated polymer blends",

abstract = "White LEDs were fabricated by precoating blue InGaN LEDs with blends of a green emitting polymer (Poly[{9, 9-dioctyl-2, 7-divinylenefluorenylene)-alto-co- (2-methoxy-5-(2-ethylhexyloxy)-l, 4-phenylene)], PFPV) and a red emitting polymer (Poly[l-methoxy-4-(2-ethylhexyloxy-2, 5-phenylenevinylene)], MEH-PPV), which acted as the phosphor. The two polymers were blended in different weight ratios, which were found to affect the green (555 nm) and red (610 nm) emission intensity. The CIE-1931 coordinate, Tc and Ra all changed as the MEH-PPV content increased. The white LED of the polymer blend phosphor containing 33wt% MEH-PPV had a luminous efficiency of 54.2 lm/W at 20 mA with a CIE-1931 coordinate, Tc and Ra of (0.3328. 0.3547L 5488 and 71.4. respectively.",

keywords = "Conjugated polymer blending, Electroluminescence, Phosphors, White light emitting diodes",

author = "Yu, {Hong Jeong} and Kwanhwi Park and Wonkeun Chung and Jihyun Klm and Chun, {Byung Hee} and Kim, {Sung Hyun}",

note = "Funding Information: Acknowledgment. The authors are grateful for financial support for this work from the Carbon Dioxide Reduction and Sequestration Center, a 21st Century Frontier R&D Program funded by the Ministry of Science and Technology of Korea.",

year = "2009",

doi = "10.1295/polymj.PJ2009152",

language = "English",

volume = "41",

pages = "1076--1079",

journal = "Polymer Journal",

issn = "0032-3896",

publisher = "Nature Publishing Group",

number = "12",

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TY - JOUR

T1 - White light emission from blue InGaN LED with fluorescent conjugated polymer blends

AU - Yu, Hong Jeong

AU - Park, Kwanhwi

AU - Chung, Wonkeun

AU - Klm, Jihyun

AU - Chun, Byung Hee

AU - Kim, Sung Hyun

N1 - Funding Information: Acknowledgment. The authors are grateful for financial support for this work from the Carbon Dioxide Reduction and Sequestration Center, a 21st Century Frontier R&D Program funded by the Ministry of Science and Technology of Korea.

PY - 2009

Y1 - 2009

N2 - White LEDs were fabricated by precoating blue InGaN LEDs with blends of a green emitting polymer (Poly[{9, 9-dioctyl-2, 7-divinylenefluorenylene)-alto-co- (2-methoxy-5-(2-ethylhexyloxy)-l, 4-phenylene)], PFPV) and a red emitting polymer (Poly[l-methoxy-4-(2-ethylhexyloxy-2, 5-phenylenevinylene)], MEH-PPV), which acted as the phosphor. The two polymers were blended in different weight ratios, which were found to affect the green (555 nm) and red (610 nm) emission intensity. The CIE-1931 coordinate, Tc and Ra all changed as the MEH-PPV content increased. The white LED of the polymer blend phosphor containing 33wt% MEH-PPV had a luminous efficiency of 54.2 lm/W at 20 mA with a CIE-1931 coordinate, Tc and Ra of (0.3328. 0.3547L 5488 and 71.4. respectively.

AB - White LEDs were fabricated by precoating blue InGaN LEDs with blends of a green emitting polymer (Poly[{9, 9-dioctyl-2, 7-divinylenefluorenylene)-alto-co- (2-methoxy-5-(2-ethylhexyloxy)-l, 4-phenylene)], PFPV) and a red emitting polymer (Poly[l-methoxy-4-(2-ethylhexyloxy-2, 5-phenylenevinylene)], MEH-PPV), which acted as the phosphor. The two polymers were blended in different weight ratios, which were found to affect the green (555 nm) and red (610 nm) emission intensity. The CIE-1931 coordinate, Tc and Ra all changed as the MEH-PPV content increased. The white LED of the polymer blend phosphor containing 33wt% MEH-PPV had a luminous efficiency of 54.2 lm/W at 20 mA with a CIE-1931 coordinate, Tc and Ra of (0.3328. 0.3547L 5488 and 71.4. respectively.

KW - Conjugated polymer blending

KW - Electroluminescence

KW - Phosphors

KW - White light emitting diodes

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U2 - 10.1295/polymj.PJ2009152

DO - 10.1295/polymj.PJ2009152

M3 - Article

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SN - 0032-3896

VL - 41

SP - 1076

EP - 1079

JO - Polymer Journal

JF - Polymer Journal

IS - 12

ER -

White light emission from blue InGaN LED with fluorescent conjugated polymer blends

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Keywords

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