Abstract
Inverted packaging structure is a promising alternative for thermal isolation between light-emitting diode (LED) chips and quantum dot (QD) converters with effective heat dissipation. However, serious reflection loss occurs at the lead frame owing to the inverted bonding of LED chips. In this study, the scattering nanoparticles-induced reflection effect has been developed to enhance the optical efficiency of inverted QD-LEDs combined with the centrifugation technique. The strong back-scattered effect of boron nitride (BN) nanoparticles with a thin columnar structure is chosen for reflection enhancement according to the ray-tracing and finite different time-domain simulations. Furthermore, a centrifugation technique is introduced to control the equilibrium geometry of the BN-incorporating reflector (BNR) by changing the centrifugal speed. Results indicate that the luminous flux of inverted QD/BNR-LEDs using the optimized concave BNR structure largely increases by 82.8% compared with reference inverted QD-LEDs. The great enhancement is attributed to the light concentrated effect of the concave geometry and the strong diffusion reflection ability of BN scattering nanoparticles. Consequently, the smart design on reflection properties of inverted QD-LEDs is critical for achieving high optical performances.
Issue Section:
Research Papers
References
1.
Pust
,
P.
,
Schmidt
,
P. J.
, and
Schnick
,
W.
, 2015
, “
A Revolution in Lighting
,” Nat. Mater.
,
14
(5
), pp. 454
–458
.10.1038/nmat42702.
Nakamura
,
S.
,
Mukai
,
T.
, and
Senoh
,
M.
, 1994
, “
Candela-Class High-Brightness InGaN/AlGaN Double-Heterostructure Blue-Light-Emitting Diodes
,” Appl. Phys. Lett.
,
64
(13
), pp. 1687
–1689
.10.1063/1.1118323.
Jang
,
E.
,
Jun
,
S.
,
Jang
,
H.
,
Lim
,
J.
,
Kim
,
B.
, and
Kim
,
Y.
, 2010
, “
White-Light-Emitting Diodes With Quantum Dot Color Converters for Display Backlights
,” Adv. Mater.
,
22
(28
), pp. 3076
–3080
.10.1002/adma.2010005254.
Li
,
Z. T.
,
Cao
,
K.
,
Li
,
J. S.
,
Tang
,
Y.
,
Xu
,
L.
,
Ding
,
X. R.
, and
Yu
,
B. H.
, 2019
, “
Investigation of Light-Extraction Mechanisms of Multiscale Patterned Arrays With Rough Morphology for GaN-Based Thin-Film LEDs
,” IEEE Access
,
7
, pp. 73890
–73898
.10.1109/ACCESS.2019.29210585.
Ye
,
S.
,
Xiao
,
F.
,
Pan
,
Y.
,
Ma
,
Y.
, and
Zhang
,
Q.
, 2010
, “
Phosphors in Phosphor-Converted White Light-Emitting Diodes: Recent Advances in Materials, Techniques and Properties
,” Mater. Sci. Eng. R: Rep.
,
71
(1
), pp. 1
–34
.10.1016/j.mser.2010.07.0016.
Chen
,
K.-J.
,
Chen
,
H.-C.
,
Shih
,
M.-H.
,
Wang
,
C.-H.
,
Tsai
,
H.-H.
,
Chien
,
S.-H.
,
Lin
,
C. C.
, and
Kuo
,
H.-C.
, 2013
, “
Enhanced Luminous Efficiency of WLEDs Using a Dual-Layer Structure of the Remote Phosphor Package
,” J. Lightwave Technol.
,
31
, pp. 1941
–1945
.10.1109/JLT.2013.22603227.
Tsai
,
P.-Y.
,
Huang
,
H.-K.
,
Sung
,
J.-M.
,
Kan
,
M.-C.
, and
Wang
,
Y.-H.
, 2015
, “
High Thermal Stability and Wide Angle of White Light Chip-on-Board Package Using a Remote Phosphor Structure
,” IEEE Electron Device Lett.
,
36
(3
), pp. 250
–252
.10.1109/LED.2015.23887748.
Li
,
Z.
,
Yong
,
T.
,
Li
,
J.
,
Wu
,
C.
,
Ding
,
X.
, and
Yu
,
B.
, 2018
, “
High Color Uniformity of White Light-Emitting Diodes Using Chip-Scaled Package
,” IEEE Photonics Technol. Lett.
,
30
(11
), pp. 989
–992
.10.1109/LPT.2018.28265429.
Li
,
Z.
,
Song
,
C.
,
Li
,
J.
,
Liang
,
G.
,
Rao
,
L.
,
Yu
,
S.
,
Ding
,
X.
,
Tang
,
Y.
,
Yu
,
B.
,
Ou
,
J.
,
Lemmer
,
U.
, and
Gomard
,
G.
, 2020
, “
Highly Efficient and Water-Stable Lead Halide Perovskite Quantum Dots Using Superhydrophobic Aerogel Inorganic Matrix for White Light-Emitting Diodes
,” Adv. Mater. Technol.
,
5
(2
), p. 1900941
.10.1002/admt.20190094110.
Huang Chen
,
S.-W.
,
Shen
,
C.-C.
,
Wu
,
T.
,
Liao
,
Z.-Y.
,
Chen
,
L.-F.
,
Zhou
,
J.-R.
,
Lee
,
C.-F.
,
Lin
,
C.-H.
,
Lin
,
C.-C.
,
Sher
,
C.-W.
,
Lee
,
P.-T.
,
Tzou
,
A.-J.
,
Chen
,
Z.
, and
Kuo
,
H.-C.
, 2019
, “
Full-Color Monolithic Hybrid Quantum Dot Nanoring Micro Light-Emitting Diodes With Improved Efficiency Using Atomic Layer Deposition and Nonradiative Resonant Energy Transfer
,” Photonics Res.
,
7
(4
), pp. 416
–422
.10.1364/PRJ.7.00041611.
Xie
,
B.
,
Liu
,
H.
,
Hu
,
R.
,
Wang
,
C.
,
Hao
,
J.
,
Wang
,
K.
, and
Luo
,
X.
, 2018
, “
Targeting Cooling for Quantum Dots in White QDs-LEDs by Hexagonal Boron Nitride Platelets With Electrostatic Bonding
,” Adv. Funct. Mater.
,
28
(30
), p. 1801407
.10.1002/adfm.20180140712.
Li
,
J.
,
Tang
,
Y.
,
Li
,
Z.
,
Ding
,
X.
,
Yu
,
B.
, and
Lin
,
L.
, 2019
, “
Largely Enhancing Luminous Efficacy, Color-Conversion Efficiency, and Stability for Quantum Dot White LEDs Using the Two-Dimensional Hexagonal Pore Structure of SBA-15 Mesoporous Particles
,” ACS Appl. Mater. Interfaces
,
11
(20
), pp. 18808
–18816
.10.1021/acsami.8b2229813.
Chen
,
H. W.
,
Zhu
,
R. D.
,
He
,
J.
,
Duan
,
W.
,
Hu
,
W.
,
Lu
,
Y. Q.
,
Li
,
M. C.
,
Lee
,
S. L.
,
Dong
,
Y. J.
, and
Wu
,
S. T.
, 2017
, “
Going Beyond the Limit of an LCD's Color Gamut
,” Light Sci. Appl.
,
6
(9
), p. e17043.10.1038/lsa.2017.4314.
Wu
,
T.
,
Sher
,
C.-W.
,
Lin
,
Y.
,
Lee
,
C.-F.
,
Liang
,
S.
,
Lu
,
Y.
,
Huang Chen
,
S.-W.
,
Guo
,
W.
,
Kuo
,
H.-C.
, and
Chen
,
Z.
, 2018
, “
Mini-LED and Micro-LED: Promising Candidates for the Next Generation Display Technology
,” Appl. Sci.
,
8
(9
), p. 1557
.10.3390/app809155715.
Kim
,
T.-H.
,
Jun
,
S.
,
Cho
,
K.-S.
,
Choi
,
B. L.
, and
Jang
,
E.
, 2013
, “
Bright and Stable Quantum Dots and Their Applications in Full-Color Displays
,” MRS Bull.
,
38
(9
), pp. 712
–720
.10.1557/mrs.2013.18416.
Han
,
H.-V.
,
Lin
,
H.-Y.
,
Lin
,
C.-C.
,
Chong
,
W.-C.
,
Li
,
J.-R.
,
Chen
,
K.-J.
,
Yu
,
P.
,
Chen
,
T.-M.
,
Chen
,
H.-M.
,
Lau
,
K.-M.
, and
Kuo
,
H.-C.
, 2015
, “
Resonant-Enhanced Full-Color Emission of Quantum-Dot-Based Micro LED Display Technology
,” Opt. Express
,
23
(25
), pp. 32504
–32515
.10.1364/OE.23.03250417.
Lin
,
H.-Y.
,
Sher
,
C.-W.
,
Hsieh
,
D.-H.
,
Chen
,
X.-Y.
,
Chen
,
H.-M. P.
,
Chen
,
T.-M.
,
Lau
,
K.-M.
,
Chen
,
C.-H.
,
Lin
,
C.-C.
, and
Kuo
,
H.-C.
, 2017
, “
Optical Cross-Talk Reduction in a Quantum-Dot-Based Full-Color Micro-Light-Emitting-Diode Display by a Lithographic-Fabricated Photoresist Mold
,” Photonics Res.
,
5
(5
), pp. 411
–416
.10.1364/PRJ.5.00041118.
Li
,
J. S.
,
Tang
,
Y.
,
Li
,
Z. T.
,
Ding
,
X. R.
,
Rao
,
L. S.
, and
Yu
,
B. H.
, 2018
, “
Effect of Quantum Dot Scattering and Absorption on the Optical Performance of White Light-Emitting Diodes
,” IEEE Trans. Electron Devices
,
65
(7
), pp. 2877
–2884
.10.1109/TED.2018.283079819.
Sher
,
C.-W.
,
Lin
,
C.-H.
,
Lin
,
H.-Y.
,
Lin
,
C.-C.
,
Huang
,
C.-H.
,
Chen
,
K.-J.
,
Li
,
J.-R.
,
Wang
,
K.-Y.
,
Tu
,
H.-H.
,
Fu
,
C.-C.
, and
Kuo
,
H.-C.
, 2016
, “
High Quality Liquid-Type Quantum Dots White Light-Emitting Diode
,” Nanoscale
,
8
(2
), pp. 1117
–1122
.10.1039/C5NR05676D20.
Li
,
J.-S.
,
Tang
,
Y.
,
Li
,
Z.-T.
,
Rao
,
L.-S.
,
Ding
,
X.-R.
, and
Yu
,
B.-H.
, 2018
, “
High Efficiency Solid–Liquid Hybrid-State Quantum Dot Light-Emitting Diodes
,” Photonics Res.
,
6
(12
), pp. 1107
–1115
.10.1364/PRJ.6.00110721.
Sadeghi
,
S.
,
Kumar
,
B. G.
,
Melikov
,
R.
,
Aria
,
M. M.
,
Jalali
,
H. B.
, and
Nizamoglu
,
S.
, 2018
, “
Quantum Dot White LEDs With High Luminous Efficiency
,” Optica
,
5
(7
), pp. 793
–802
.10.1364/OPTICA.5.00079322.
Li
,
J.
,
Tang
,
Y.
,
Li
,
Z.
,
Ding
,
X.
,
Rao
,
L.
, and
Yu
,
B.
, 2019
, “
Investigation of Stability and Optical Performance of Quantum-Dot-Based LEDs With Methyl-terminated-PDMS-Based Liquid-Type Packaging Structure
,” Opt. Lett.
,
44
(1
), pp. 90
–93
.10.1364/OL.44.00009023.
Wang
,
H.
,
Mou
,
Y.
,
Peng
,
Y.
,
Liu
,
J.
,
Liang
,
R.
,
Chen
,
M.
,
Dai
,
J.
, and
Chen
,
C.
, 2019
, “
White Light-Emitting Diodes With High Color Quality Fabricated Using Phosphor-in-Glass Integrated With Liquid-Type Quantum Dot
,” IEEE Electron Device Lett.
,
40
(4
), pp. 601
–604
.10.1109/led.2019.289771824.
Li
,
J.-S.
,
Tang
,
Y.
,
Li
,
Z.-T.
,
Kang
,
W.-Q.
,
Ding
,
X.-R.
, and
Yu
,
B.-H.
, 2019
, “
Study on Reabsorption Properties of Quantum Dot Color Convertors for Light-Emitting Diode Packaging
,” ASME J. Electron. Packag.
,
141
(4
), p. 041006
.10.1115/1.404447525.
Xie
,
B.
,
Liu
,
H.
,
Sun
,
X.
,
Yu
,
X.
,
Wu
,
R.
,
Wang
,
K.
, and
Luo
,
X.
, 2019
, “
Reduced Working Temperature of Quantum Dots-Light-Emitting Diodes Optimized by Quantum Dots at Silica-on-Chip Structure
,” ASME J. Electron. Packag.
,
141
(3
), p. 031001
.10.1115/1.404298126.
Li
,
J.-S.
,
Tang
,
Y.
,
Li
,
Z.-T.
,
Liang
,
G.-W.
,
Ding
,
X.-R.
, and
Yu
,
B.-H.
, 2019
, “
High Thermal Performance and Reliability of Quantum-Dot-Based Light-Emitting Diodes With Watt-Level Injection Power
,” IEEE Trans. Device Mater. Reliab.
,
19
(1
), pp. 120
–125
.10.1109/TDMR.2018.288629927.
Li
,
Z. T.
,
Li
,
J. X.
,
Li
,
J. S.
,
Du
,
X. W.
,
Song
,
C. J.
, and
Tang
,
Y.
, 2019
, “
Thermal Impact of LED Chips on Quantum Dots in Remote-Chip and on-Chip Packaging Structures
,” IEEE Trans. Electron Devices
,
66
(11
), pp. 4817
–4822
.10.1109/TED.2019.294191128.
Woo
,
J. Y.
,
Kim
,
K. N.
,
Jeong
,
S.
, and
Han
,
C.-S.
, 2010
, “
Thermal Behavior of a Quantum Dot Nanocomposite as a Color Converting Material and Its Application to White LED
,” Nanotechnology
,
21
(49
), p. 495704
.10.1088/0957-4484/21/49/49570429.
Abe
,
S.
,
Joos
,
J. J.
,
Martin
,
L. I.
,
Hens
,
Z.
, and
Smet
,
P. F.
, 2017
, “
Hybrid Remote Quantum Dot/Powder Phosphor Designs for Display Backlights
,” Light: Sci. Appl.
,
6
(6
), p. e16271
.10.1038/lsa.2016.27130.
Tang
,
Y.
,
Lu
,
H. G.
,
Li
,
J. S.
,
Li
,
Z. T.
,
Du
,
X. W.
,
Ding
,
X. R.
, and
Yu
,
B. H.
, 2019
, “
Improvement of Optical and Thermal Properties for Quantum Dots WLEDs by Controlling Layer Location
,” IEEE Access
,
7
, pp. 77642
–77648
.10.1109/ACCESS.2019.291972931.
Xie
,
B.
,
Chen
,
W.
,
Hao
,
J.
,
Wu
,
D.
,
Yu
,
X.
,
Chen
,
Y.
,
Hu
,
R.
,
Wang
,
K.
, and
Luo
,
X.
, 2016
, “
Structural Optimization for Remote White Light-Emitting Diodes With Quantum Dots and Phosphor: Packaging Sequence Matters
,” Opt. Express
,
24
(26
), pp. A1560
–A1570
.10.1364/OE.24.0A156032.
Lei
,
X.
,
Zheng
,
H.
,
Guo
,
X.
,
Chu
,
J.
,
Liu
,
S.
, and
Liu
,
P.
, 2016
, “
Optical Performance Enhancement of Quantum Dot-Based Light-Emitting Diodes Through an Optimized Remote Structure
,” IEEE Trans. Electron Devices
,
63
(2
), pp. 691
–697
.10.1109/TED.2015.250802633.
Li
,
Z. T.
,
Song
,
C. J.
,
Qiu
,
Z. Y.
,
Li
,
J. S.
,
Cao
,
K.
,
Ding
,
X. R.
, and
Tang
,
Y.
, 2019
, “
Study on the Thermal and Optical Performance of Quantum Dot White Light-Emitting Diodes Using Metal-Based Inverted Packaging Structure
,” IEEE Trans. Electron Devices
,
66
(7
), pp. 3020
–3027
.10.1109/TED.2019.291701034.
Chen
,
K.-J.
,
Han
,
H.-V.
,
Chen
,
H.-C.
,
Lin
,
C.-C.
,
Chien
,
S.-H.
,
Huang
,
C.-C.
,
Chen
,
T.-M.
,
Shih
,
M.-H.
, and
Kuo
,
H.-C.
, 2014
, “
White Light Emitting Diodes With Enhanced CCT Uniformity and Luminous Flux Using ZrO2 Nanoparticles
,” Nanoscale
,
6
(10
), pp. 5378
–5383
.10.1039/C3NR06894C35.
Tang
,
Y.
,
Li
,
Z.
,
Li
,
Z. T.
,
Li
,
J. S.
,
Yu
,
S. D.
, and
Rao
,
L. S.
, 2018
, “
Enhancement of Luminous Efficiency and Uniformity of CCT for Quantum Dot-Converted LEDs by Incorporating With ZnO Nanoparticles
,” IEEE Trans. Electron Devices
,
65
(1
), pp. 158
–164
.10.1109/TED.2017.277178536.
Flock
,
S. T.
,
Patterson
,
M. S.
,
Wilson
,
B. C.
, and
Wyman
,
D. R.
, 1989
, “
Monte Carlo Modeling of Light Propagation in Highly Scattering Tissues. I. Model Predictions and Comparison With Diffusion Theory
,” IEEE Trans. Biomed. Eng.
,
36
(12
), pp. 1162
–1168
.10.1109/TBME.1989.117362437.
Jones
,
A.
, 1999
, “
Light Scattering for Particle Characterization
,” Prog. Energy Combust. Sci.
,
25
(1
), pp. 1
–53
.10.1016/S0360-1285(98)00017-338.
Li
,
J.
,
Chen
,
J.
,
Lin
,
L.
,
Li
,
Z.
,
Tang
,
Y.
,
Yu
,
B.
, and
Ding
,
X.
, 2015
, “
A Detailed Study on Phosphor-Converted Light-Emitting Diodes With Multi-Phosphor Configuration Using the Finite Difference Time-Domain and Ray-Tracing Methods
,” IEEE J. Quantum Electron.
,
51
(10
), pp. 1
–10
.10.1109/JQE.2015.247234139.
Brakke
,
K. A.
, 1992
, “
The Surface Evolver
,” Exp. Math.
,
1
(2
), pp. 141
–165
.10.1080/10586458.1992.1050425340.
Chou
,
T.-H.
,
Hong
,
S.-J.
,
Liang
,
Y.-E.
,
Tsao
,
H.-K.
, and
Sheng
,
Y.-J.
, 2011
, “
Equilibrium Phase Diagram of Drop-on-Fiber: Coexistent States and Gravity Effect
,” Langmuir
,
27
(7
), pp. 3685
–3692
.10.1021/la2000969Copyright © 2021 by ASME
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