PMID- 33921533
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20240401
IS  - 2072-666X (Print)
IS  - 2072-666X (Electronic)
IS  - 2072-666X (Linking)
VI  - 12
IP  - 4
DP  - 2021 Apr 12
TI  - Color-Tunable White LEDs with Single Chip Realized through Phosphor Pattern and 
      Thermal-Modulating Optical Film.
LID - 10.3390/mi12040421 [doi]
LID - 421
AB  - In this paper, a new method to regulate the correlated color temperature (CCT) of 
      white light-emitting diodes (LEDs) is proposed for the single-chip packaging 
      structure, in which the blue light distribution emitted from the chip in the 
      red/yellow phosphor layer was modulated through changing the 
      paraffin-polydimethylsiloxane (PDMS) film transparence and haze. The results show 
      that the transmittance of the paraffin-PDMS film can be modulated from 49.76% to 
      97.64%, while the haze of that ranges from 88.19% to 63.10%. When the thickness 
      of paraffin-PDMS film is 0.6 mm, and the paraffin-PDMS film concentration is 30 
      wt%, the CCT of white LED decreases from 15177 K to 3615 K with the increase of 
      thermal load in the paraffin-PDMS film. The modulating range of its CCT reaches 
      11562 K. The maximum CCT variation at the same test condition is only 536 K in 
      the repeated experiments within one week.
FAU - Su, Zhenpeng
AU  - Su Z
AUID- ORCID: 0000-0002-4094-057X
AD  - Institute of Technological Sciences, Wuhan University, Wuhan 430072, China.
FAU - Zhao, Bo
AU  - Zhao B
AD  - School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, 
      China.
FAU - Gong, Zheng
AU  - Gong Z
AD  - School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, 
      China.
FAU - Peng, Yang
AU  - Peng Y
AUID- ORCID: 0000-0002-1282-9487
AD  - School of Aerospace Engineering, Huazhong University of Science and Technology, 
      Wuhan 430074, China.
FAU - Bai, Fan
AU  - Bai F
AUID- ORCID: 0000-0002-1080-5596
AD  - School of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, Korea.
FAU - Zheng, Huai
AU  - Zheng H
AD  - Institute of Technological Sciences, Wuhan University, Wuhan 430072, China.
AD  - School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, 
      China.
FAU - Joo, Sang Woo
AU  - Joo SW
AD  - School of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, Korea.
LA  - eng
GR  - 51975423/National Natural Science Foundation of China/
GR  - NRF-2018R1A2B3001246/National Research Foundation of Korea/
PT  - Journal Article
DEP - 20210412
PL  - Switzerland
TA  - Micromachines (Basel)
JT  - Micromachines
JID - 101640903
PMC - PMC8069560
OTO - NOTNLM
OT  - LED packaging
OT  - correlated color temperature (CCT)
OT  - light-emitting diodes (LEDs)
OT  - paraffin-PDMS film
COIS- The authors declare no conflict of interest.
EDAT- 2021/05/01 06:00
MHDA- 2021/05/01 06:01
PMCR- 2021/04/12
CRDT- 2021/04/30 01:19
PHST- 2021/03/17 00:00 [received]
PHST- 2021/04/08 00:00 [revised]
PHST- 2021/04/09 00:00 [accepted]
PHST- 2021/04/30 01:19 [entrez]
PHST- 2021/05/01 06:00 [pubmed]
PHST- 2021/05/01 06:01 [medline]
PHST- 2021/04/12 00:00 [pmc-release]
AID - mi12040421 [pii]
AID - micromachines-12-00421 [pii]
AID - 10.3390/mi12040421 [doi]
PST - epublish
SO  - Micromachines (Basel). 2021 Apr 12;12(4):421. doi: 10.3390/mi12040421.